meta-xilinx-core: Bring in a copy of wic from poky

Import a copy of wic and lib/oe as of poky commit:
   8f74fa4073d4b2ba8e0d9559aa654f3cafcf373a

Signed-off-by: Mark Hatle <mark.hatle@amd.com>

38 files changed, 11892 insertions, 0 deletions

diff --git a/meta-xilinx-core/lib/oe/__init__.py b/meta-xilinx-core/lib/oe/__init__.py
new file mode 100644
index 00000000..6eb536ad
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/__init__.py
@@ -0,0 +1,12 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+from pkgutil import extend_path
+__path__ = extend_path(__path__, __name__)
+
+BBIMPORTS = ["data", "path", "utils", "types", "package", "packagedata", \
+             "packagegroup", "sstatesig", "lsb", "cachedpath", "license", \
+             "qa", "reproducible", "rust", "buildcfg", "go"]
diff --git a/meta-xilinx-core/lib/oe/buildcfg.py b/meta-xilinx-core/lib/oe/buildcfg.py
new file mode 100644
index 00000000..27b059b8
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/buildcfg.py
@@ -0,0 +1,79 @@
+
+import os
+import subprocess
+import bb.process
+
+def detect_revision(d):
+    path = get_scmbasepath(d)
+    return get_metadata_git_revision(path)
+
+def detect_branch(d):
+    path = get_scmbasepath(d)
+    return get_metadata_git_branch(path)
+
+def get_scmbasepath(d):
+    return os.path.join(d.getVar('COREBASE'), 'meta')
+
+def get_metadata_git_branch(path):
+    try:
+        rev, _ = bb.process.run('git rev-parse --abbrev-ref HEAD', cwd=path)
+    except bb.process.ExecutionError:
+        rev = '<unknown>'
+    return rev.strip()
+
+def get_metadata_git_revision(path):
+    try:
+        rev, _ = bb.process.run('git rev-parse HEAD', cwd=path)
+    except bb.process.ExecutionError:
+        rev = '<unknown>'
+    return rev.strip()
+
+def get_metadata_git_toplevel(path):
+    try:
+        toplevel, _ = bb.process.run('git rev-parse --show-toplevel', cwd=path)
+    except bb.process.ExecutionError:
+        return ""
+    return toplevel.strip()
+
+def get_metadata_git_remotes(path):
+    try:
+        remotes_list, _ = bb.process.run('git remote', cwd=path)
+        remotes = remotes_list.split()
+    except bb.process.ExecutionError:
+        remotes = []
+    return remotes
+
+def get_metadata_git_remote_url(path, remote):
+    try:
+        uri, _ = bb.process.run('git remote get-url {remote}'.format(remote=remote), cwd=path)
+    except bb.process.ExecutionError:
+        return ""
+    return uri.strip()
+
+def get_metadata_git_describe(path):
+    try:
+        describe, _ = bb.process.run('git describe --tags', cwd=path)
+    except bb.process.ExecutionError:
+        return ""
+    return describe.strip()
+
+def is_layer_modified(path):
+    try:
+        subprocess.check_output("""cd %s; export PSEUDO_UNLOAD=1; set -e;
+                                git diff --quiet --no-ext-diff
+                                git diff --quiet --no-ext-diff --cached""" % path,
+                                shell=True,
+                                stderr=subprocess.STDOUT)
+        return ""
+    except subprocess.CalledProcessError as ex:
+        # Silently treat errors as "modified", without checking for the
+        # (expected) return code 1 in a modified git repo. For example, we get
+        # output and a 129 return code when a layer isn't a git repo at all.
+        return " -- modified"
+
+def get_layer_revisions(d):
+    layers = (d.getVar("BBLAYERS") or "").split()
+    revisions = []
+    for i in layers:
+        revisions.append((i, os.path.basename(i), get_metadata_git_branch(i).strip(), get_metadata_git_revision(i), is_layer_modified(i)))
+    return revisions
diff --git a/meta-xilinx-core/lib/oe/buildhistory_analysis.py b/meta-xilinx-core/lib/oe/buildhistory_analysis.py
new file mode 100644
index 00000000..4edad015
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/buildhistory_analysis.py
@@ -0,0 +1,723 @@
+# Report significant differences in the buildhistory repository since a specific revision
+#
+# Copyright (C) 2012-2013, 2016-2017 Intel Corporation
+# Author: Paul Eggleton <paul.eggleton@linux.intel.com>
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Note: requires GitPython 0.3.1+
+#
+# You can use this from the command line by running scripts/buildhistory-diff
+#
+
+import sys
+import os.path
+import difflib
+import git
+import re
+import shlex
+import hashlib
+import collections
+import bb.utils
+import bb.tinfoil
+
+
+# How to display fields
+list_fields = ['DEPENDS', 'RPROVIDES', 'RDEPENDS', 'RRECOMMENDS', 'RSUGGESTS', 'RREPLACES', 'RCONFLICTS', 'FILES', 'FILELIST', 'USER_CLASSES', 'IMAGE_CLASSES', 'IMAGE_FEATURES', 'IMAGE_LINGUAS', 'IMAGE_INSTALL', 'BAD_RECOMMENDATIONS', 'PACKAGE_EXCLUDE']
+list_order_fields = ['PACKAGES']
+defaultval_map = {'PKG': 'PKG', 'PKGE': 'PE', 'PKGV': 'PV', 'PKGR': 'PR'}
+numeric_fields = ['PKGSIZE', 'IMAGESIZE']
+# Fields to monitor
+monitor_fields = ['RPROVIDES', 'RDEPENDS', 'RRECOMMENDS', 'RREPLACES', 'RCONFLICTS', 'PACKAGES', 'FILELIST', 'PKGSIZE', 'IMAGESIZE', 'PKG']
+ver_monitor_fields = ['PKGE', 'PKGV', 'PKGR']
+# Percentage change to alert for numeric fields
+monitor_numeric_threshold = 10
+# Image files to monitor (note that image-info.txt is handled separately)
+img_monitor_files = ['installed-package-names.txt', 'files-in-image.txt']
+
+colours = {
+    'colour_default': '',
+    'colour_add':     '',
+    'colour_remove':  '',
+}
+
+def init_colours(use_colours):
+    global colours
+    if use_colours:
+        colours = {
+            'colour_default': '\033[0m',
+            'colour_add':     '\033[1;32m',
+            'colour_remove':  '\033[1;31m',
+        }
+    else:
+        colours = {
+            'colour_default': '',
+            'colour_add':     '',
+            'colour_remove':  '',
+        }
+
+class ChangeRecord:
+    def __init__(self, path, fieldname, oldvalue, newvalue, monitored):
+        self.path = path
+        self.fieldname = fieldname
+        self.oldvalue = oldvalue
+        self.newvalue = newvalue
+        self.monitored = monitored
+        self.filechanges = None
+
+    def __str__(self):
+        return self._str_internal(True)
+
+    def _str_internal(self, outer):
+        if outer:
+            if '/image-files/' in self.path:
+                prefix = '%s: ' % self.path.split('/image-files/')[0]
+            else:
+                prefix = '%s: ' % self.path
+        else:
+            prefix = ''
+
+        def pkglist_combine(depver):
+            pkglist = []
+            for k,v in depver.items():
+                if v:
+                    pkglist.append("%s (%s)" % (k,v))
+                else:
+                    pkglist.append(k)
+            return pkglist
+
+        def detect_renamed_dirs(aitems, bitems):
+            adirs = set(map(os.path.dirname, aitems))
+            bdirs = set(map(os.path.dirname, bitems))
+            files_ab = [(name, sorted(os.path.basename(item) for item in aitems if os.path.dirname(item) == name)) \
+                                for name in adirs - bdirs]
+            files_ba = [(name, sorted(os.path.basename(item) for item in bitems if os.path.dirname(item) == name)) \
+                                for name in bdirs - adirs]
+            renamed_dirs = []
+            for dir1, files1 in files_ab:
+                rename = False
+                for dir2, files2 in files_ba:
+                    if files1 == files2 and not rename:
+                        renamed_dirs.append((dir1,dir2))
+                        # Make sure that we don't use this (dir, files) pair again.
+                        files_ba.remove((dir2,files2))
+                        # If a dir has already been found to have a rename, stop and go no further.
+                        rename = True
+
+            # remove files that belong to renamed dirs from aitems and bitems
+            for dir1, dir2 in renamed_dirs:
+                aitems = [item for item in aitems if os.path.dirname(item) not in (dir1, dir2)]
+                bitems = [item for item in bitems if os.path.dirname(item) not in (dir1, dir2)]
+            return renamed_dirs, aitems, bitems
+
+        if self.fieldname in list_fields or self.fieldname in list_order_fields:
+            renamed_dirs = []
+            changed_order = False
+            if self.fieldname in ['RPROVIDES', 'RDEPENDS', 'RRECOMMENDS', 'RSUGGESTS', 'RREPLACES', 'RCONFLICTS']:
+                (depvera, depverb) = compare_pkg_lists(self.oldvalue, self.newvalue)
+                aitems = pkglist_combine(depvera)
+                bitems = pkglist_combine(depverb)
+            else:
+                if self.fieldname == 'FILELIST':
+                    aitems = shlex.split(self.oldvalue)
+                    bitems = shlex.split(self.newvalue)
+                    renamed_dirs, aitems, bitems = detect_renamed_dirs(aitems, bitems)
+                else:
+                    aitems = self.oldvalue.split()
+                    bitems = self.newvalue.split()
+
+            removed = list(set(aitems) - set(bitems))
+            added = list(set(bitems) - set(aitems))
+
+            if not removed and not added and self.fieldname in ['RPROVIDES', 'RDEPENDS', 'RRECOMMENDS', 'RSUGGESTS', 'RREPLACES', 'RCONFLICTS']:
+                depvera = bb.utils.explode_dep_versions2(self.oldvalue, sort=False)
+                depverb = bb.utils.explode_dep_versions2(self.newvalue, sort=False)
+                for i, j in zip(depvera.items(), depverb.items()):
+                    if i[0] != j[0]:
+                        changed_order = True
+                        break
+
+            lines = []
+            if renamed_dirs:
+                for dfrom, dto in renamed_dirs:
+                    lines.append('directory renamed {colour_remove}{}{colour_default} -> {colour_add}{}{colour_default}'.format(dfrom, dto, **colours))
+            if removed or added:
+                if removed and not bitems:
+                    lines.append('removed all items "{colour_remove}{}{colour_default}"'.format(' '.join(removed), **colours))
+                else:
+                    if removed:
+                        lines.append('removed "{colour_remove}{value}{colour_default}"'.format(value=' '.join(removed), **colours))
+                    if added:
+                        lines.append('added "{colour_add}{value}{colour_default}"'.format(value=' '.join(added), **colours))
+            else:
+                lines.append('changed order')
+
+            if not (removed or added or changed_order):
+                out = ''
+            else:
+                out = '%s: %s' % (self.fieldname, ', '.join(lines))
+
+        elif self.fieldname in numeric_fields:
+            aval = int(self.oldvalue or 0)
+            bval = int(self.newvalue or 0)
+            if aval != 0:
+                percentchg = ((bval - aval) / float(aval)) * 100
+            else:
+                percentchg = 100
+            out = '{} changed from {colour_remove}{}{colour_default} to {colour_add}{}{colour_default} ({}{:.0f}%)'.format(self.fieldname, self.oldvalue or "''", self.newvalue or "''", '+' if percentchg > 0 else '', percentchg, **colours)
+        elif self.fieldname in defaultval_map:
+            out = '{} changed from {colour_remove}{}{colour_default} to {colour_add}{}{colour_default}'.format(self.fieldname, self.oldvalue, self.newvalue, **colours)
+            if self.fieldname == 'PKG' and '[default]' in self.newvalue:
+                out += ' - may indicate debian renaming failure'
+        elif self.fieldname in ['pkg_preinst', 'pkg_postinst', 'pkg_prerm', 'pkg_postrm']:
+            if self.oldvalue and self.newvalue:
+                out = '%s changed:\n  ' % self.fieldname
+            elif self.newvalue:
+                out = '%s added:\n  ' % self.fieldname
+            elif self.oldvalue:
+                out = '%s cleared:\n  ' % self.fieldname
+            alines = self.oldvalue.splitlines()
+            blines = self.newvalue.splitlines()
+            diff = difflib.unified_diff(alines, blines, self.fieldname, self.fieldname, lineterm='')
+            out += '\n  '.join(list(diff)[2:])
+            out += '\n  --'
+        elif self.fieldname in img_monitor_files or '/image-files/' in self.path or self.fieldname == "sysroot":
+            if self.filechanges or (self.oldvalue and self.newvalue):
+                fieldname = self.fieldname
+                if '/image-files/' in self.path:
+                    fieldname = os.path.join('/' + self.path.split('/image-files/')[1], self.fieldname)
+                    out = 'Changes to %s:\n  ' % fieldname
+                else:
+                    if outer:
+                        prefix = 'Changes to %s ' % self.path
+                    out = '(%s):\n  ' % self.fieldname
+                if self.filechanges:
+                    out += '\n  '.join(['%s' % i for i in self.filechanges])
+                else:
+                    alines = self.oldvalue.splitlines()
+                    blines = self.newvalue.splitlines()
+                    diff = difflib.unified_diff(alines, blines, fieldname, fieldname, lineterm='')
+                    out += '\n  '.join(list(diff))
+                    out += '\n  --'
+            else:
+                out = ''
+        else:
+            out = '{} changed from "{colour_remove}{}{colour_default}" to "{colour_add}{}{colour_default}"'.format(self.fieldname, self.oldvalue, self.newvalue, **colours)
+
+        return '%s%s' % (prefix, out) if out else ''
+
+class FileChange:
+    changetype_add = 'A'
+    changetype_remove = 'R'
+    changetype_type = 'T'
+    changetype_perms = 'P'
+    changetype_ownergroup = 'O'
+    changetype_link = 'L'
+    changetype_move = 'M'
+
+    def __init__(self, path, changetype, oldvalue = None, newvalue = None):
+        self.path = path
+        self.changetype = changetype
+        self.oldvalue = oldvalue
+        self.newvalue = newvalue
+
+    def _ftype_str(self, ftype):
+        if ftype == '-':
+            return 'file'
+        elif ftype == 'd':
+            return 'directory'
+        elif ftype == 'l':
+            return 'symlink'
+        elif ftype == 'c':
+            return 'char device'
+        elif ftype == 'b':
+            return 'block device'
+        elif ftype == 'p':
+            return 'fifo'
+        elif ftype == 's':
+            return 'socket'
+        else:
+            return 'unknown (%s)' % ftype
+
+    def __str__(self):
+        if self.changetype == self.changetype_add:
+            return '%s was added' % self.path
+        elif self.changetype == self.changetype_remove:
+            return '%s was removed' % self.path
+        elif self.changetype == self.changetype_type:
+            return '%s changed type from %s to %s' % (self.path, self._ftype_str(self.oldvalue), self._ftype_str(self.newvalue))
+        elif self.changetype == self.changetype_perms:
+            return '%s changed permissions from %s to %s' % (self.path, self.oldvalue, self.newvalue)
+        elif self.changetype == self.changetype_ownergroup:
+            return '%s changed owner/group from %s to %s' % (self.path, self.oldvalue, self.newvalue)
+        elif self.changetype == self.changetype_link:
+            return '%s changed symlink target from %s to %s' % (self.path, self.oldvalue, self.newvalue)
+        elif self.changetype == self.changetype_move:
+            return '%s moved to %s' % (self.path, self.oldvalue)
+        else:
+            return '%s changed (unknown)' % self.path
+
+def blob_to_dict(blob):
+    alines = [line for line in blob.data_stream.read().decode('utf-8').splitlines()]
+    adict = {}
+    for line in alines:
+        splitv = [i.strip() for i in line.split('=',1)]
+        if len(splitv) > 1:
+            adict[splitv[0]] = splitv[1]
+    return adict
+
+
+def file_list_to_dict(lines):
+    adict = {}
+    for line in lines:
+        # Leave the last few fields intact so we handle file names containing spaces
+        splitv = line.split(None,4)
+        # Grab the path and remove the leading .
+        path = splitv[4][1:].strip()
+        # Handle symlinks
+        if(' -> ' in path):
+            target = path.split(' -> ')[1]
+            path = path.split(' -> ')[0]
+            adict[path] = splitv[0:3] + [target]
+        else:
+            adict[path] = splitv[0:3]
+    return adict
+
+numeric_removal = str.maketrans('0123456789', 'XXXXXXXXXX')
+
+def compare_file_lists(alines, blines, compare_ownership=True):
+    adict = file_list_to_dict(alines)
+    bdict = file_list_to_dict(blines)
+    filechanges = []
+    additions = []
+    removals = []
+    for path, splitv in adict.items():
+        newsplitv = bdict.pop(path, None)
+        if newsplitv:
+            # Check type
+            oldvalue = splitv[0][0]
+            newvalue = newsplitv[0][0]
+            if oldvalue != newvalue:
+                filechanges.append(FileChange(path, FileChange.changetype_type, oldvalue, newvalue))
+
+            # Check permissions
+            oldvalue = splitv[0][1:]
+            newvalue = newsplitv[0][1:]
+            if oldvalue != newvalue:
+                filechanges.append(FileChange(path, FileChange.changetype_perms, oldvalue, newvalue))
+
+            if compare_ownership:
+                # Check owner/group
+                oldvalue = '%s/%s' % (splitv[1], splitv[2])
+                newvalue = '%s/%s' % (newsplitv[1], newsplitv[2])
+                if oldvalue != newvalue:
+                    filechanges.append(FileChange(path, FileChange.changetype_ownergroup, oldvalue, newvalue))
+
+            # Check symlink target
+            if newsplitv[0][0] == 'l':
+                if len(splitv) > 3:
+                    oldvalue = splitv[3]
+                else:
+                    oldvalue = None
+                newvalue = newsplitv[3]
+                if oldvalue != newvalue:
+                    filechanges.append(FileChange(path, FileChange.changetype_link, oldvalue, newvalue))
+        else:
+            removals.append(path)
+
+    # Whatever is left over has been added
+    for path in bdict:
+        additions.append(path)
+
+    # Rather than print additions and removals, its nicer to print file 'moves'
+    # where names or paths are similar.
+    revmap_remove = {}
+    for removal in removals:
+        translated = removal.translate(numeric_removal)
+        if translated not in revmap_remove:
+            revmap_remove[translated] = []
+        revmap_remove[translated].append(removal)
+
+    #
+    # We want to detect renames of large trees of files like
+    # /lib/modules/5.4.40-yocto-standard to /lib/modules/5.4.43-yocto-standard
+    #
+    renames = {}
+    for addition in additions.copy():
+        if addition not in additions:
+            continue
+        translated = addition.translate(numeric_removal)
+        if translated in revmap_remove:
+            if len(revmap_remove[translated]) != 1:
+                continue
+            removal = revmap_remove[translated][0]
+            commondir = addition.split("/")
+            commondir2 = removal.split("/")
+            idx = None
+            for i in range(len(commondir)):
+                if commondir[i] != commondir2[i]:
+                    idx = i
+                    break
+            commondir = "/".join(commondir[:i+1])
+            commondir2 = "/".join(commondir2[:i+1])
+            # If the common parent is in one dict and not the other its likely a rename
+            # so iterate through those files and process as such
+            if commondir2 not in bdict and commondir not in adict:
+                if commondir not in renames:
+                    renames[commondir] = commondir2
+                    for addition2 in additions.copy():
+                        if addition2.startswith(commondir):
+                            removal2 = addition2.replace(commondir, commondir2)
+                            if removal2 in removals:
+                                additions.remove(addition2)
+                                removals.remove(removal2)
+                    continue
+            filechanges.append(FileChange(removal, FileChange.changetype_move, addition))
+            if addition in additions:
+                additions.remove(addition)
+            if removal in removals:
+                removals.remove(removal)
+    for rename in renames:
+        filechanges.append(FileChange(renames[rename], FileChange.changetype_move, rename))
+
+    for addition in additions:
+        filechanges.append(FileChange(addition, FileChange.changetype_add))
+    for removal in removals:
+        filechanges.append(FileChange(removal, FileChange.changetype_remove))
+
+    return filechanges
+
+
+def compare_lists(alines, blines):
+    removed = list(set(alines) - set(blines))
+    added = list(set(blines) - set(alines))
+
+    filechanges = []
+    for pkg in removed:
+        filechanges.append(FileChange(pkg, FileChange.changetype_remove))
+    for pkg in added:
+        filechanges.append(FileChange(pkg, FileChange.changetype_add))
+
+    return filechanges
+
+
+def compare_pkg_lists(astr, bstr):
+    depvera = bb.utils.explode_dep_versions2(astr)
+    depverb = bb.utils.explode_dep_versions2(bstr)
+
+    # Strip out changes where the version has increased
+    remove = []
+    for k in depvera:
+        if k in depverb:
+            dva = depvera[k]
+            dvb = depverb[k]
+            if dva and dvb and len(dva) == len(dvb):
+                # Since length is the same, sort so that prefixes (e.g. >=) will line up
+                dva.sort()
+                dvb.sort()
+                removeit = True
+                for dvai, dvbi in zip(dva, dvb):
+                    if dvai != dvbi:
+                        aiprefix = dvai.split(' ')[0]
+                        biprefix = dvbi.split(' ')[0]
+                        if aiprefix == biprefix and aiprefix in ['>=', '=']:
+                            if bb.utils.vercmp(bb.utils.split_version(dvai), bb.utils.split_version(dvbi)) > 0:
+                                removeit = False
+                                break
+                        else:
+                            removeit = False
+                            break
+                if removeit:
+                    remove.append(k)
+
+    for k in remove:
+        depvera.pop(k)
+        depverb.pop(k)
+
+    return (depvera, depverb)
+
+
+def compare_dict_blobs(path, ablob, bblob, report_all, report_ver):
+    adict = blob_to_dict(ablob)
+    bdict = blob_to_dict(bblob)
+
+    pkgname = os.path.basename(path)
+
+    defaultvals = {}
+    defaultvals['PKG'] = pkgname
+    defaultvals['PKGE'] = '0'
+
+    changes = []
+    keys = list(set(adict.keys()) | set(bdict.keys()) | set(defaultval_map.keys()))
+    for key in keys:
+        astr = adict.get(key, '')
+        bstr = bdict.get(key, '')
+        if key in ver_monitor_fields:
+            monitored = report_ver or astr or bstr
+        else:
+            monitored = key in monitor_fields
+        mapped_key = defaultval_map.get(key, '')
+        if mapped_key:
+            if not astr:
+                astr = '%s [default]' % adict.get(mapped_key, defaultvals.get(key, ''))
+            if not bstr:
+                bstr = '%s [default]' % bdict.get(mapped_key, defaultvals.get(key, ''))
+
+        if astr != bstr:
+            if (not report_all) and key in numeric_fields:
+                aval = int(astr or 0)
+                bval = int(bstr or 0)
+                if aval != 0:
+                    percentchg = ((bval - aval) / float(aval)) * 100
+                else:
+                    percentchg = 100
+                if abs(percentchg) < monitor_numeric_threshold:
+                    continue
+            elif (not report_all) and key in list_fields:
+                if key == "FILELIST" and (path.endswith("-dbg") or path.endswith("-src")) and bstr.strip() != '':
+                    continue
+                if key in ['RPROVIDES', 'RDEPENDS', 'RRECOMMENDS', 'RSUGGESTS', 'RREPLACES', 'RCONFLICTS']:
+                    (depvera, depverb) = compare_pkg_lists(astr, bstr)
+                    if depvera == depverb:
+                        continue
+                if key == 'FILELIST':
+                    alist = shlex.split(astr)
+                    blist = shlex.split(bstr)
+                else:
+                    alist = astr.split()
+                    blist = bstr.split()
+                alist.sort()
+                blist.sort()
+                # We don't care about the removal of self-dependencies
+                if pkgname in alist and not pkgname in blist:
+                    alist.remove(pkgname)
+                if ' '.join(alist) == ' '.join(blist):
+                    continue
+
+            if key == 'PKGR' and not report_all:
+                vers = []
+                # strip leading 'r' and dots
+                for ver in (astr.split()[0], bstr.split()[0]):
+                    if ver.startswith('r'):
+                        ver = ver[1:]
+                    vers.append(ver.replace('.', ''))
+                maxlen = max(len(vers[0]), len(vers[1]))
+                try:
+                    # pad with '0' and convert to int
+                    vers = [int(ver.ljust(maxlen, '0')) for ver in vers]
+                except ValueError:
+                    pass
+                else:
+                     # skip decrements and increments
+                    if abs(vers[0] - vers[1]) == 1:
+                        continue
+
+            chg = ChangeRecord(path, key, astr, bstr, monitored)
+            changes.append(chg)
+    return changes
+
+
+def compare_siglists(a_blob, b_blob, taskdiff=False):
+    # FIXME collapse down a recipe's tasks?
+    alines = a_blob.data_stream.read().decode('utf-8').splitlines()
+    blines = b_blob.data_stream.read().decode('utf-8').splitlines()
+    keys = []
+    pnmap = {}
+    def readsigs(lines):
+        sigs = {}
+        for line in lines:
+            linesplit = line.split()
+            if len(linesplit) > 2:
+                sigs[linesplit[0]] = linesplit[2]
+                if not linesplit[0] in keys:
+                    keys.append(linesplit[0])
+                pnmap[linesplit[1]] = linesplit[0].rsplit('.', 1)[0]
+        return sigs
+    adict = readsigs(alines)
+    bdict = readsigs(blines)
+    out = []
+
+    changecount = 0
+    addcount = 0
+    removecount = 0
+    if taskdiff:
+        with bb.tinfoil.Tinfoil() as tinfoil:
+            tinfoil.prepare(config_only=True)
+
+            changes = collections.OrderedDict()
+
+            def compare_hashfiles(pn, taskname, hash1, hash2):
+                hashes = [hash1, hash2]
+                hashfiles = bb.siggen.find_siginfo(pn, taskname, hashes, tinfoil.config_data)
+
+                if not taskname:
+                    (pn, taskname) = pn.rsplit('.', 1)
+                    pn = pnmap.get(pn, pn)
+                desc = '%s.%s' % (pn, taskname)
+
+                if len(hashfiles) == 0:
+                    out.append("Unable to find matching sigdata for %s with hashes %s or %s" % (desc, hash1, hash2))
+                elif not hash1 in hashfiles:
+                    out.append("Unable to find matching sigdata for %s with hash %s" % (desc, hash1))
+                elif not hash2 in hashfiles:
+                    out.append("Unable to find matching sigdata for %s with hash %s" % (desc, hash2))
+                else:
+                    out2 = bb.siggen.compare_sigfiles(hashfiles[hash1]['path'], hashfiles[hash2]['path'], recursecb, collapsed=True)
+                    for line in out2:
+                        m = hashlib.sha256()
+                        m.update(line.encode('utf-8'))
+                        entry = changes.get(m.hexdigest(), (line, []))
+                        if desc not in entry[1]:
+                            changes[m.hexdigest()] = (line, entry[1] + [desc])
+
+            # Define recursion callback
+            def recursecb(key, hash1, hash2):
+                compare_hashfiles(key, None, hash1, hash2)
+                return []
+
+            for key in keys:
+                siga = adict.get(key, None)
+                sigb = bdict.get(key, None)
+                if siga is not None and sigb is not None and siga != sigb:
+                    changecount += 1
+                    (pn, taskname) = key.rsplit('.', 1)
+                    compare_hashfiles(pn, taskname, siga, sigb)
+                elif siga is None:
+                    addcount += 1
+                elif sigb is None:
+                    removecount += 1
+        for key, item in changes.items():
+            line, tasks = item
+            if len(tasks) == 1:
+                desc = tasks[0]
+            elif len(tasks) == 2:
+                desc = '%s and %s' % (tasks[0], tasks[1])
+            else:
+                desc = '%s and %d others' % (tasks[-1], len(tasks)-1)
+            out.append('%s: %s' % (desc, line))
+    else:
+        for key in keys:
+            siga = adict.get(key, None)
+            sigb = bdict.get(key, None)
+            if siga is not None and sigb is not None and siga != sigb:
+                out.append('%s changed from %s to %s' % (key, siga, sigb))
+                changecount += 1
+            elif siga is None:
+                out.append('%s was added' % key)
+                addcount += 1
+            elif sigb is None:
+                out.append('%s was removed' % key)
+                removecount += 1
+    out.append('Summary: %d tasks added, %d tasks removed, %d tasks modified (%.1f%%)' % (addcount, removecount, changecount, (changecount / float(len(bdict)) * 100)))
+    return '\n'.join(out)
+
+
+def process_changes(repopath, revision1, revision2='HEAD', report_all=False, report_ver=False,
+                    sigs=False, sigsdiff=False, exclude_path=None):
+    repo = git.Repo(repopath)
+    assert repo.bare == False
+    commit = repo.commit(revision1)
+    diff = commit.diff(revision2)
+
+    changes = []
+
+    if sigs or sigsdiff:
+        for d in diff.iter_change_type('M'):
+            if d.a_blob.path == 'siglist.txt':
+                changes.append(compare_siglists(d.a_blob, d.b_blob, taskdiff=sigsdiff))
+        return changes
+
+    for d in diff.iter_change_type('M'):
+        path = os.path.dirname(d.a_blob.path)
+        if path.startswith('packages/'):
+            filename = os.path.basename(d.a_blob.path)
+            if filename == 'latest':
+                changes.extend(compare_dict_blobs(path, d.a_blob, d.b_blob, report_all, report_ver))
+            elif filename.startswith('latest.'):
+                chg = ChangeRecord(path, filename, d.a_blob.data_stream.read().decode('utf-8'), d.b_blob.data_stream.read().decode('utf-8'), True)
+                changes.append(chg)
+            elif filename == 'sysroot':
+                alines = d.a_blob.data_stream.read().decode('utf-8').splitlines()
+                blines = d.b_blob.data_stream.read().decode('utf-8').splitlines()
+                filechanges = compare_file_lists(alines,blines, compare_ownership=False)
+                if filechanges:
+                    chg = ChangeRecord(path, filename, None, None, True)
+                    chg.filechanges = filechanges
+                    changes.append(chg)
+
+        elif path.startswith('images/'):
+            filename = os.path.basename(d.a_blob.path)
+            if filename in img_monitor_files:
+                if filename == 'files-in-image.txt':
+                    alines = d.a_blob.data_stream.read().decode('utf-8').splitlines()
+                    blines = d.b_blob.data_stream.read().decode('utf-8').splitlines()
+                    filechanges = compare_file_lists(alines,blines)
+                    if filechanges:
+                        chg = ChangeRecord(path, filename, None, None, True)
+                        chg.filechanges = filechanges
+                        changes.append(chg)
+                elif filename == 'installed-package-names.txt':
+                    alines = d.a_blob.data_stream.read().decode('utf-8').splitlines()
+                    blines = d.b_blob.data_stream.read().decode('utf-8').splitlines()
+                    filechanges = compare_lists(alines,blines)
+                    if filechanges:
+                        chg = ChangeRecord(path, filename, None, None, True)
+                        chg.filechanges = filechanges
+                        changes.append(chg)
+                else:
+                    chg = ChangeRecord(path, filename, d.a_blob.data_stream.read().decode('utf-8'), d.b_blob.data_stream.read().decode('utf-8'), True)
+                    changes.append(chg)
+            elif filename == 'image-info.txt':
+                changes.extend(compare_dict_blobs(path, d.a_blob, d.b_blob, report_all, report_ver))
+            elif '/image-files/' in path:
+                chg = ChangeRecord(path, filename, d.a_blob.data_stream.read().decode('utf-8'), d.b_blob.data_stream.read().decode('utf-8'), True)
+                changes.append(chg)
+
+    # Look for added preinst/postinst/prerm/postrm
+    # (without reporting newly added recipes)
+    addedpkgs = []
+    addedchanges = []
+    for d in diff.iter_change_type('A'):
+        path = os.path.dirname(d.b_blob.path)
+        if path.startswith('packages/'):
+            filename = os.path.basename(d.b_blob.path)
+            if filename == 'latest':
+                addedpkgs.append(path)
+            elif filename.startswith('latest.'):
+                chg = ChangeRecord(path, filename[7:], '', d.b_blob.data_stream.read().decode('utf-8'), True)
+                addedchanges.append(chg)
+    for chg in addedchanges:
+        found = False
+        for pkg in addedpkgs:
+            if chg.path.startswith(pkg):
+                found = True
+                break
+        if not found:
+            changes.append(chg)
+
+    # Look for cleared preinst/postinst/prerm/postrm
+    for d in diff.iter_change_type('D'):
+        path = os.path.dirname(d.a_blob.path)
+        if path.startswith('packages/'):
+            filename = os.path.basename(d.a_blob.path)
+            if filename != 'latest' and filename.startswith('latest.'):
+                chg = ChangeRecord(path, filename[7:], d.a_blob.data_stream.read().decode('utf-8'), '', True)
+                changes.append(chg)
+
+    # filter out unwanted paths
+    if exclude_path:
+        for chg in changes:
+            if chg.filechanges:
+                fchgs = []
+                for fchg in chg.filechanges:
+                    for epath in exclude_path:
+                        if fchg.path.startswith(epath):
+                           break
+                    else:
+                        fchgs.append(fchg)
+                chg.filechanges = fchgs
+
+    if report_all:
+        return changes
+    else:
+        return [chg for chg in changes if chg.monitored]
diff --git a/meta-xilinx-core/lib/oe/cachedpath.py b/meta-xilinx-core/lib/oe/cachedpath.py
new file mode 100644
index 00000000..0138b791
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/cachedpath.py
@@ -0,0 +1,237 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Based on standard python library functions but avoid
+# repeated stat calls. Its assumed the files will not change from under us
+# so we can cache stat calls.
+#
+
+import os
+import errno
+import stat as statmod
+
+class CachedPath(object):
+    def __init__(self):
+        self.statcache = {}
+        self.lstatcache = {}
+        self.normpathcache = {}
+        return
+
+    def updatecache(self, x):
+        x = self.normpath(x)
+        if x in self.statcache:
+            del self.statcache[x]
+        if x in self.lstatcache:
+            del self.lstatcache[x]
+
+    def normpath(self, path):
+        if path in self.normpathcache:
+            return self.normpathcache[path]
+        newpath = os.path.normpath(path)
+        self.normpathcache[path] = newpath
+        return newpath
+
+    def _callstat(self, path):
+        if path in self.statcache:
+            return self.statcache[path]
+        try:
+            st = os.stat(path)
+            self.statcache[path] = st
+            return st
+        except os.error:
+            self.statcache[path] = False
+            return False
+
+    # We might as well call lstat and then only 
+    # call stat as well in the symbolic link case
+    # since this turns out to be much more optimal
+    # in real world usage of this cache
+    def callstat(self, path):
+        path = self.normpath(path)
+        self.calllstat(path)
+        return self.statcache[path]
+
+    def calllstat(self, path):
+        path = self.normpath(path)
+        if path in self.lstatcache:
+            return self.lstatcache[path]
+        #bb.error("LStatpath:" + path)
+        try:
+            lst = os.lstat(path)
+            self.lstatcache[path] = lst
+            if not statmod.S_ISLNK(lst.st_mode):
+                self.statcache[path] = lst
+            else:
+                self._callstat(path)
+            return lst
+        except (os.error, AttributeError):
+            self.lstatcache[path] = False
+            self.statcache[path] = False
+            return False
+
+    # This follows symbolic links, so both islink() and isdir() can be true
+    # for the same path ono systems that support symlinks
+    def isfile(self, path):
+        """Test whether a path is a regular file"""
+        st = self.callstat(path)
+        if not st:
+            return False
+        return statmod.S_ISREG(st.st_mode)
+
+    # Is a path a directory?
+    # This follows symbolic links, so both islink() and isdir()
+    # can be true for the same path on systems that support symlinks
+    def isdir(self, s):
+        """Return true if the pathname refers to an existing directory."""
+        st = self.callstat(s)
+        if not st:
+            return False
+        return statmod.S_ISDIR(st.st_mode)
+
+    def islink(self, path):
+        """Test whether a path is a symbolic link"""
+        st = self.calllstat(path)
+        if not st:
+            return False
+        return statmod.S_ISLNK(st.st_mode)
+
+    # Does a path exist?
+    # This is false for dangling symbolic links on systems that support them.
+    def exists(self, path):
+        """Test whether a path exists.  Returns False for broken symbolic links"""
+        if self.callstat(path):
+            return True
+        return False
+
+    def lexists(self, path):
+        """Test whether a path exists.  Returns True for broken symbolic links"""
+        if self.calllstat(path):
+            return True
+        return False
+
+    def stat(self, path):
+        return self.callstat(path)
+
+    def lstat(self, path):
+        return self.calllstat(path)
+
+    def walk(self, top, topdown=True, onerror=None, followlinks=False):
+        # Matches os.walk, not os.path.walk()
+
+        # We may not have read permission for top, in which case we can't
+        # get a list of the files the directory contains.  os.path.walk
+        # always suppressed the exception then, rather than blow up for a
+        # minor reason when (say) a thousand readable directories are still
+        # left to visit.  That logic is copied here.
+        try:
+            names = os.listdir(top)
+        except os.error as err:
+            if onerror is not None:
+                onerror(err)
+            return
+
+        dirs, nondirs = [], []
+        for name in names:
+            if self.isdir(os.path.join(top, name)):
+                dirs.append(name)
+            else:
+                nondirs.append(name)
+
+        if topdown:
+            yield top, dirs, nondirs
+        for name in dirs:
+            new_path = os.path.join(top, name)
+            if followlinks or not self.islink(new_path):
+                for x in self.walk(new_path, topdown, onerror, followlinks):
+                    yield x
+        if not topdown:
+            yield top, dirs, nondirs
+
+    ## realpath() related functions
+    def __is_path_below(self, file, root):
+        return (file + os.path.sep).startswith(root)
+
+    def __realpath_rel(self, start, rel_path, root, loop_cnt, assume_dir):
+        """Calculates real path of symlink 'start' + 'rel_path' below
+        'root'; no part of 'start' below 'root' must contain symlinks. """
+        have_dir = True
+
+        for d in rel_path.split(os.path.sep):
+            if not have_dir and not assume_dir:
+                raise OSError(errno.ENOENT, "no such directory %s" % start)
+
+            if d == os.path.pardir: # '..'
+                if len(start) >= len(root):
+                    # do not follow '..' before root
+                    start = os.path.dirname(start)
+                else:
+                    # emit warning?
+                    pass
+            else:
+                (start, have_dir) = self.__realpath(os.path.join(start, d),
+                                                    root, loop_cnt, assume_dir)
+
+            assert(self.__is_path_below(start, root))
+
+        return start
+
+    def __realpath(self, file, root, loop_cnt, assume_dir):
+        while self.islink(file) and len(file) >= len(root):
+            if loop_cnt == 0:
+                raise OSError(errno.ELOOP, file)
+
+            loop_cnt -= 1
+            target = os.path.normpath(os.readlink(file))
+    
+            if not os.path.isabs(target):
+                tdir = os.path.dirname(file)
+                assert(self.__is_path_below(tdir, root))
+            else:
+                tdir = root
+
+            file = self.__realpath_rel(tdir, target, root, loop_cnt, assume_dir)
+
+        try:
+            is_dir = self.isdir(file)
+        except:
+            is_dir = False
+
+        return (file, is_dir)
+
+    def realpath(self, file, root, use_physdir = True, loop_cnt = 100, assume_dir = False):
+        """ Returns the canonical path of 'file' with assuming a
+        toplevel 'root' directory. When 'use_physdir' is set, all
+        preceding path components of 'file' will be resolved first;
+        this flag should be set unless it is guaranteed that there is
+        no symlink in the path. When 'assume_dir' is not set, missing
+        path components will raise an ENOENT error"""
+
+        root = os.path.normpath(root)
+        file = os.path.normpath(file)
+
+        if not root.endswith(os.path.sep):
+            # letting root end with '/' makes some things easier
+            root = root + os.path.sep
+
+        if not self.__is_path_below(file, root):
+            raise OSError(errno.EINVAL, "file '%s' is not below root" % file)
+
+        try:
+            if use_physdir:
+                file = self.__realpath_rel(root, file[(len(root) - 1):], root, loop_cnt, assume_dir)
+            else:
+                file = self.__realpath(file, root, loop_cnt, assume_dir)[0]
+        except OSError as e:
+            if e.errno == errno.ELOOP:
+                # make ELOOP more readable; without catching it, there will
+                # be printed a backtrace with 100s of OSError exceptions
+                # else
+                raise OSError(errno.ELOOP,
+                              "too much recursions while resolving '%s'; loop in '%s'" %
+                              (file, e.strerror))
+
+            raise
+
+        return file
diff --git a/meta-xilinx-core/lib/oe/classextend.py b/meta-xilinx-core/lib/oe/classextend.py
new file mode 100644
index 00000000..5161d33d
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/classextend.py
@@ -0,0 +1,159 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import collections
+
+def get_packages(d):
+    pkgs = d.getVar("PACKAGES_NONML")
+    extcls = d.getVar("EXTENDERCLASS")
+    return extcls.rename_packages_internal(pkgs)
+
+def get_depends(varprefix, d):
+    extcls = d.getVar("EXTENDERCLASS")
+    return extcls.map_depends_variable(varprefix + "_NONML")
+
+class ClassExtender(object):
+    def __init__(self, extname, d):
+        self.extname = extname
+        self.d = d
+        self.pkgs_mapping = []
+        self.d.setVar("EXTENDERCLASS", self)
+
+    def extend_name(self, name):
+        if name.startswith("kernel-") or name == "virtual/kernel":
+            return name
+        if name.startswith("rtld"):
+            return name
+        if name.endswith("-crosssdk"):
+            return name
+        if name.endswith("-" + self.extname):
+            name = name.replace("-" + self.extname, "")
+        if name.startswith("virtual/"):
+            # Assume large numbers of dashes means a triplet is present and we don't need to convert
+            if name.count("-") >= 3 and name.endswith(("-go", "-binutils", "-gcc", "-g++")):
+                return name
+            subs = name.split("/", 1)[1]
+            if not subs.startswith(self.extname):
+                return "virtual/" + self.extname + "-" + subs
+            return name
+        if name.startswith("/") or (name.startswith("${") and name.endswith("}")):
+            return name
+        if not name.startswith(self.extname):
+            return self.extname + "-" + name
+        return name
+
+    def map_variable(self, varname, setvar = True):
+        var = self.d.getVar(varname)
+        if not var:
+            return ""
+        var = var.split()
+        newvar = []
+        for v in var:
+            newvar.append(self.extend_name(v))
+        newdata =  " ".join(newvar)
+        if setvar:
+            self.d.setVar(varname, newdata)
+        return newdata
+
+    def map_regexp_variable(self, varname, setvar = True):
+        var = self.d.getVar(varname)
+        if not var:
+            return ""
+        var = var.split()
+        newvar = []
+        for v in var:
+            if v.startswith("^" + self.extname):
+                newvar.append(v)
+            elif v.startswith("^"):
+                newvar.append("^" + self.extname + "-" + v[1:])
+            else:
+                newvar.append(self.extend_name(v))
+        newdata =  " ".join(newvar)
+        if setvar:
+            self.d.setVar(varname, newdata)
+        return newdata
+
+    def map_depends(self, dep):
+        if dep.endswith(("-native", "-native-runtime")) or ('nativesdk-' in dep) or ('cross-canadian' in dep) or ('-crosssdk-' in dep):
+            return dep
+        else:
+            # Do not extend for that already have multilib prefix
+            var = self.d.getVar("MULTILIB_VARIANTS")
+            if var:
+                var = var.split()
+                for v in var:
+                    if dep.startswith(v):
+                        return dep
+            return self.extend_name(dep)
+
+    def map_depends_variable(self, varname, suffix = ""):
+        # We need to preserve EXTENDPKGV so it can be expanded correctly later
+        if suffix:
+            varname = varname + ":" + suffix
+        orig = self.d.getVar("EXTENDPKGV", False)
+        self.d.setVar("EXTENDPKGV", "EXTENDPKGV")
+        deps = self.d.getVar(varname)
+        if not deps:
+            self.d.setVar("EXTENDPKGV", orig)
+            return
+        deps = bb.utils.explode_dep_versions2(deps)
+        newdeps = collections.OrderedDict()
+        for dep in deps:
+            newdeps[self.map_depends(dep)] = deps[dep]
+
+        if not varname.endswith("_NONML"):
+            self.d.renameVar(varname, varname + "_NONML")
+            self.d.setVar(varname, "${@oe.classextend.get_depends('%s', d)}" % varname)
+            self.d.appendVarFlag(varname, "vardeps", " " + varname + "_NONML")
+        ret = bb.utils.join_deps(newdeps, False).replace("EXTENDPKGV", "${EXTENDPKGV}")
+        self.d.setVar("EXTENDPKGV", orig)
+        return ret
+
+    def map_packagevars(self):
+        for pkg in (self.d.getVar("PACKAGES").split() + [""]):
+            self.map_depends_variable("RDEPENDS", pkg)
+            self.map_depends_variable("RRECOMMENDS", pkg)
+            self.map_depends_variable("RSUGGESTS", pkg)
+            self.map_depends_variable("RPROVIDES", pkg)
+            self.map_depends_variable("RREPLACES", pkg)
+            self.map_depends_variable("RCONFLICTS", pkg)
+            self.map_depends_variable("PKG", pkg)
+
+    def rename_packages(self):
+        for pkg in (self.d.getVar("PACKAGES") or "").split():
+            if pkg.startswith(self.extname):
+               self.pkgs_mapping.append([pkg.split(self.extname + "-")[1], pkg])
+               continue
+            self.pkgs_mapping.append([pkg, self.extend_name(pkg)])
+
+        self.d.renameVar("PACKAGES", "PACKAGES_NONML")
+        self.d.setVar("PACKAGES", "${@oe.classextend.get_packages(d)}")
+
+    def rename_packages_internal(self, pkgs):
+        self.pkgs_mapping = []
+        for pkg in (self.d.expand(pkgs) or "").split():
+            if pkg.startswith(self.extname):
+               self.pkgs_mapping.append([pkg.split(self.extname + "-")[1], pkg])
+               continue
+            self.pkgs_mapping.append([pkg, self.extend_name(pkg)])
+
+        return " ".join([row[1] for row in self.pkgs_mapping])
+
+    def rename_package_variables(self, variables):
+        for pkg_mapping in self.pkgs_mapping:
+            if pkg_mapping[0].startswith("${") and pkg_mapping[0].endswith("}"):
+                continue
+            for subs in variables:
+                self.d.renameVar("%s:%s" % (subs, pkg_mapping[0]), "%s:%s" % (subs, pkg_mapping[1]))
+
+class NativesdkClassExtender(ClassExtender):
+    def map_depends(self, dep):
+        if dep.startswith(self.extname):
+            return dep
+        if dep.endswith(("-native", "-native-runtime")) or ('nativesdk-' in dep) or ('-cross-' in dep) or ('-crosssdk-' in dep):
+            return dep
+        else:
+            return self.extend_name(dep)
diff --git a/meta-xilinx-core/lib/oe/classutils.py b/meta-xilinx-core/lib/oe/classutils.py
new file mode 100644
index 00000000..ec3f6ad7
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/classutils.py
@@ -0,0 +1,49 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+class ClassRegistryMeta(type):
+    """Give each ClassRegistry their own registry"""
+    def __init__(cls, name, bases, attrs):
+        cls.registry = {}
+        type.__init__(cls, name, bases, attrs)
+
+class ClassRegistry(type, metaclass=ClassRegistryMeta):
+    """Maintain a registry of classes, indexed by name.
+
+Note that this implementation requires that the names be unique, as it uses
+a dictionary to hold the classes by name.
+
+The name in the registry can be overridden via the 'name' attribute of the
+class, and the 'priority' attribute controls priority. The prioritized()
+method returns the registered classes in priority order.
+
+Subclasses of ClassRegistry may define an 'implemented' property to exert
+control over whether the class will be added to the registry (e.g. to keep
+abstract base classes out of the registry)."""
+    priority = 0
+    def __init__(cls, name, bases, attrs):
+        super(ClassRegistry, cls).__init__(name, bases, attrs)
+        try:
+            if not cls.implemented:
+                return
+        except AttributeError:
+            pass
+
+        try:
+            cls.name
+        except AttributeError:
+            cls.name = name
+        cls.registry[cls.name] = cls
+
+    @classmethod
+    def prioritized(tcls):
+        return sorted(list(tcls.registry.values()),
+                      key=lambda v: (v.priority, v.name), reverse=True)
+
+    def unregister(cls):
+        for key in cls.registry.keys():
+            if cls.registry[key] is cls:
+                del cls.registry[key]
diff --git a/meta-xilinx-core/lib/oe/copy_buildsystem.py b/meta-xilinx-core/lib/oe/copy_buildsystem.py
new file mode 100644
index 00000000..81abfbf9
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/copy_buildsystem.py
@@ -0,0 +1,293 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# This class should provide easy access to the different aspects of the
+# buildsystem such as layers, bitbake location, etc.
+#
+# SDK_LAYERS_EXCLUDE: Layers which will be excluded from SDK layers.
+# SDK_LAYERS_EXCLUDE_PATTERN: The simiar to SDK_LAYERS_EXCLUDE, this supports
+#                             python regular expression, use space as separator,
+#                              e.g.: ".*-downloads closed-.*"
+#
+
+import stat
+import shutil
+
+def _smart_copy(src, dest):
+    import subprocess
+    # smart_copy will choose the correct function depending on whether the
+    # source is a file or a directory.
+    mode = os.stat(src).st_mode
+    if stat.S_ISDIR(mode):
+        bb.utils.mkdirhier(dest)
+        cmd = "tar --exclude='.git' --exclude='__pycache__' --xattrs --xattrs-include='*' -cf - -C %s -p . \
+        | tar --xattrs --xattrs-include='*' -xf - -C %s" % (src, dest)
+        subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
+    else:
+        shutil.copyfile(src, dest)
+        shutil.copymode(src, dest)
+
+class BuildSystem(object):
+    def __init__(self, context, d):
+        self.d = d
+        self.context = context
+        self.layerdirs = [os.path.abspath(pth) for pth in d.getVar('BBLAYERS').split()]
+        self.layers_exclude = (d.getVar('SDK_LAYERS_EXCLUDE') or "").split()
+        self.layers_exclude_pattern = d.getVar('SDK_LAYERS_EXCLUDE_PATTERN')
+
+    def copy_bitbake_and_layers(self, destdir, workspace_name=None):
+        import re
+        # Copy in all metadata layers + bitbake (as repositories)
+        copied_corebase = None
+        layers_copied = []
+        bb.utils.mkdirhier(destdir)
+        layers = list(self.layerdirs)
+
+        corebase = os.path.abspath(self.d.getVar('COREBASE'))
+        layers.append(corebase)
+        # The bitbake build system uses the meta-skeleton layer as a layout
+        # for common recipies, e.g: the recipetool script to create kernel recipies
+        # Add the meta-skeleton layer to be included as part of the eSDK installation
+        layers.append(os.path.join(corebase, 'meta-skeleton'))
+
+        # Exclude layers
+        for layer_exclude in self.layers_exclude:
+            if layer_exclude in layers:
+                bb.note('Excluded %s from sdk layers since it is in SDK_LAYERS_EXCLUDE' % layer_exclude)
+                layers.remove(layer_exclude)
+
+        if self.layers_exclude_pattern:
+            layers_cp = layers[:]
+            for pattern in self.layers_exclude_pattern.split():
+                for layer in layers_cp:
+                    if re.match(pattern, layer):
+                        bb.note('Excluded %s from sdk layers since matched SDK_LAYERS_EXCLUDE_PATTERN' % layer)
+                        layers.remove(layer)
+
+        workspace_newname = workspace_name
+        if workspace_newname:
+            layernames = [os.path.basename(layer) for layer in layers]
+            extranum = 0
+            while workspace_newname in layernames:
+                extranum += 1
+                workspace_newname = '%s-%d' % (workspace_name, extranum)
+
+        corebase_files = self.d.getVar('COREBASE_FILES').split()
+        corebase_files = [corebase + '/' +x for x in corebase_files]
+        # Make sure bitbake goes in
+        bitbake_dir = bb.__file__.rsplit('/', 3)[0]
+        corebase_files.append(bitbake_dir)
+
+        for layer in layers:
+            layerconf = os.path.join(layer, 'conf', 'layer.conf')
+            layernewname = os.path.basename(layer)
+            workspace = False
+            if os.path.exists(layerconf):
+                with open(layerconf, 'r') as f:
+                    if f.readline().startswith("# ### workspace layer auto-generated by devtool ###"):
+                        if workspace_newname:
+                            layernewname = workspace_newname
+                            workspace = True
+                        else:
+                            bb.plain("NOTE: Excluding local workspace layer %s from %s" % (layer, self.context))
+                            continue
+
+            # If the layer was already under corebase, leave it there
+            # since layers such as meta have issues when moved.
+            layerdestpath = destdir
+            if corebase == os.path.dirname(layer):
+                layerdestpath += '/' + os.path.basename(corebase)
+            # If the layer is located somewhere under the same parent directory
+            # as corebase we keep the layer structure.
+            elif os.path.commonpath([layer, corebase]) == os.path.dirname(corebase):
+                layer_relative = os.path.relpath(layer, os.path.dirname(corebase))
+                if os.path.dirname(layer_relative) != layernewname:
+                    layerdestpath += '/' + os.path.dirname(layer_relative)
+
+            layerdestpath += '/' + layernewname
+
+            layer_relative = os.path.relpath(layerdestpath,
+                                             destdir)
+            # Treat corebase as special since it typically will contain
+            # build directories or other custom items.
+            if corebase == layer:
+                copied_corebase = layer_relative
+                bb.utils.mkdirhier(layerdestpath)
+                for f in corebase_files:
+                    f_basename = os.path.basename(f)
+                    destname = os.path.join(layerdestpath, f_basename)
+                    _smart_copy(f, destname)
+            else:
+                layers_copied.append(layer_relative)
+
+                if os.path.exists(os.path.join(layerdestpath, 'conf/layer.conf')):
+                    bb.note("Skipping layer %s, already handled" % layer)
+                else:
+                    _smart_copy(layer, layerdestpath)
+
+            if workspace:
+                # Make some adjustments original workspace layer
+                # Drop sources (recipe tasks will be locked, so we don't need them)
+                srcdir = os.path.join(layerdestpath, 'sources')
+                if os.path.isdir(srcdir):
+                    shutil.rmtree(srcdir)
+                # Drop all bbappends except the one for the image the SDK is being built for
+                # (because of externalsrc, the workspace bbappends will interfere with the
+                # locked signatures if present, and we don't need them anyway)
+                image_bbappend = os.path.splitext(os.path.basename(self.d.getVar('FILE')))[0] + '.bbappend'
+                appenddir = os.path.join(layerdestpath, 'appends')
+                if os.path.isdir(appenddir):
+                    for fn in os.listdir(appenddir):
+                        if fn == image_bbappend:
+                            continue
+                        else:
+                            os.remove(os.path.join(appenddir, fn))
+                # Drop README
+                readme = os.path.join(layerdestpath, 'README')
+                if os.path.exists(readme):
+                    os.remove(readme)
+                # Filter out comments in layer.conf and change layer name
+                layerconf = os.path.join(layerdestpath, 'conf', 'layer.conf')
+                with open(layerconf, 'r') as f:
+                    origlines = f.readlines()
+                with open(layerconf, 'w') as f:
+                    for line in origlines:
+                        if line.startswith('#'):
+                            continue
+                        line = line.replace('workspacelayer', workspace_newname)
+                        f.write(line)
+
+        # meta-skeleton layer is added as part of the build system
+        # but not as a layer included in the build, therefore it is
+        # not reported to the function caller.
+        for layer in layers_copied:
+            if layer.endswith('/meta-skeleton'):
+                layers_copied.remove(layer)
+                break
+
+        return copied_corebase, layers_copied
+
+def generate_locked_sigs(sigfile, d):
+    bb.utils.mkdirhier(os.path.dirname(sigfile))
+    depd = d.getVar('BB_TASKDEPDATA', False)
+    tasks = ['%s:%s' % (v[2], v[1]) for v in depd.values()]
+    bb.parse.siggen.dump_lockedsigs(sigfile, tasks)
+
+def prune_lockedsigs(excluded_tasks, excluded_targets, lockedsigs, onlynative, pruned_output):
+    with open(lockedsigs, 'r') as infile:
+        bb.utils.mkdirhier(os.path.dirname(pruned_output))
+        with open(pruned_output, 'w') as f:
+            invalue = False
+            for line in infile:
+                if invalue:
+                    if line.endswith('\\\n'):
+                        splitval = line.strip().split(':')
+                        if not splitval[1] in excluded_tasks and not splitval[0] in excluded_targets:
+                            if onlynative:
+                                if 'nativesdk' in splitval[0]:
+                                    f.write(line)
+                            else:
+                                f.write(line)
+                    else:
+                        f.write(line)
+                        invalue = False
+                elif line.startswith('SIGGEN_LOCKEDSIGS'):
+                    invalue = True
+                    f.write(line)
+
+def merge_lockedsigs(copy_tasks, lockedsigs_main, lockedsigs_extra, merged_output, copy_output=None):
+    merged = {}
+    arch_order = []
+    with open(lockedsigs_main, 'r') as f:
+        invalue = None
+        for line in f:
+            if invalue:
+                if line.endswith('\\\n'):
+                    merged[invalue].append(line)
+                else:
+                    invalue = None
+            elif line.startswith('SIGGEN_LOCKEDSIGS_t-'):
+                invalue = line[18:].split('=', 1)[0].rstrip()
+                merged[invalue] = []
+                arch_order.append(invalue)
+
+    with open(lockedsigs_extra, 'r') as f:
+        invalue = None
+        tocopy = {}
+        for line in f:
+            if invalue:
+                if line.endswith('\\\n'):
+                    if not line in merged[invalue]:
+                        target, task = line.strip().split(':')[:2]
+                        if not copy_tasks or task in copy_tasks:
+                            tocopy[invalue].append(line)
+                        merged[invalue].append(line)
+                else:
+                    invalue = None
+            elif line.startswith('SIGGEN_LOCKEDSIGS_t-'):
+                invalue = line[18:].split('=', 1)[0].rstrip()
+                if not invalue in merged:
+                    merged[invalue] = []
+                    arch_order.append(invalue)
+                tocopy[invalue] = []
+
+    def write_sigs_file(fn, types, sigs):
+        fulltypes = []
+        bb.utils.mkdirhier(os.path.dirname(fn))
+        with open(fn, 'w') as f:
+            for typename in types:
+                lines = sigs[typename]
+                if lines:
+                    f.write('SIGGEN_LOCKEDSIGS_%s = "\\\n' % typename)
+                    for line in lines:
+                        f.write(line)
+                    f.write('    "\n')
+                    fulltypes.append(typename)
+            f.write('SIGGEN_LOCKEDSIGS_TYPES = "%s"\n' % ' '.join(fulltypes))
+
+    if copy_output:
+        write_sigs_file(copy_output, list(tocopy.keys()), tocopy)
+    if merged_output:
+        write_sigs_file(merged_output, arch_order, merged)
+
+def create_locked_sstate_cache(lockedsigs, input_sstate_cache, output_sstate_cache, d, fixedlsbstring="", filterfile=None):
+    import shutil
+    bb.note('Generating sstate-cache...')
+
+    nativelsbstring = d.getVar('NATIVELSBSTRING')
+    bb.process.run("PYTHONDONTWRITEBYTECODE=1 gen-lockedsig-cache %s %s %s %s %s" % (lockedsigs, input_sstate_cache, output_sstate_cache, nativelsbstring, filterfile or ''))
+    if fixedlsbstring and nativelsbstring != fixedlsbstring:
+        nativedir = output_sstate_cache + '/' + nativelsbstring
+        if os.path.isdir(nativedir):
+            destdir = os.path.join(output_sstate_cache, fixedlsbstring)
+            for root, _, files in os.walk(nativedir):
+                for fn in files:
+                    src = os.path.join(root, fn)
+                    dest = os.path.join(destdir, os.path.relpath(src, nativedir))
+                    if os.path.exists(dest):
+                        # Already exists, and it'll be the same file, so just delete it
+                        os.unlink(src)
+                    else:
+                        bb.utils.mkdirhier(os.path.dirname(dest))
+                        shutil.move(src, dest)
+
+def check_sstate_task_list(d, targets, filteroutfile, cmdprefix='', cwd=None, logfile=None):
+    import subprocess
+
+    bb.note('Generating sstate task list...')
+
+    if not cwd:
+        cwd = os.getcwd()
+    if logfile:
+        logparam = '-l %s' % logfile
+    else:
+        logparam = ''
+    cmd = "%sPYTHONDONTWRITEBYTECODE=1 BB_SETSCENE_ENFORCE=1 PSEUDO_DISABLED=1 oe-check-sstate %s -s -o %s %s" % (cmdprefix, targets, filteroutfile, logparam)
+    env = dict(d.getVar('BB_ORIGENV', False))
+    env.pop('BUILDDIR', '')
+    env.pop('BBPATH', '')
+    pathitems = env['PATH'].split(':')
+    env['PATH'] = ':'.join([item for item in pathitems if not item.endswith('/bitbake/bin')])
+    bb.process.run(cmd, stderr=subprocess.STDOUT, env=env, cwd=cwd, executable='/bin/bash')
diff --git a/meta-xilinx-core/lib/oe/cve_check.py b/meta-xilinx-core/lib/oe/cve_check.py
new file mode 100644
index 00000000..ed5c714c
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/cve_check.py
@@ -0,0 +1,245 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: MIT
+#
+
+import collections
+import re
+import itertools
+import functools
+
+_Version = collections.namedtuple(
+    "_Version", ["release", "patch_l", "pre_l", "pre_v"]
+)
+
+@functools.total_ordering
+class Version():
+
+    def __init__(self, version, suffix=None):
+
+        suffixes = ["alphabetical", "patch"]
+
+        if str(suffix) == "alphabetical":
+            version_pattern =  r"""r?v?(?:(?P<release>[0-9]+(?:[-\.][0-9]+)*)(?P<patch>[-_\.]?(?P<patch_l>[a-z]))?(?P<pre>[-_\.]?(?P<pre_l>(rc|alpha|beta|pre|preview|dev))[-_\.]?(?P<pre_v>[0-9]+)?)?)(.*)?"""
+        elif str(suffix) == "patch":
+            version_pattern =  r"""r?v?(?:(?P<release>[0-9]+(?:[-\.][0-9]+)*)(?P<patch>[-_\.]?(p|patch)(?P<patch_l>[0-9]+))?(?P<pre>[-_\.]?(?P<pre_l>(rc|alpha|beta|pre|preview|dev))[-_\.]?(?P<pre_v>[0-9]+)?)?)(.*)?"""
+        else:
+            version_pattern =  r"""r?v?(?:(?P<release>[0-9]+(?:[-\.][0-9]+)*)(?P<pre>[-_\.]?(?P<pre_l>(rc|alpha|beta|pre|preview|dev))[-_\.]?(?P<pre_v>[0-9]+)?)?)(.*)?"""
+        regex = re.compile(r"^\s*" + version_pattern + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+        match = regex.search(version)
+        if not match:
+            raise Exception("Invalid version: '{0}'".format(version))
+
+        self._version = _Version(
+            release=tuple(int(i) for i in match.group("release").replace("-",".").split(".")),
+            patch_l=match.group("patch_l") if str(suffix) in suffixes and match.group("patch_l") else "",
+            pre_l=match.group("pre_l"),
+            pre_v=match.group("pre_v")
+        )
+
+        self._key = _cmpkey(
+            self._version.release,
+            self._version.patch_l,
+            self._version.pre_l,
+            self._version.pre_v
+        )
+
+    def __eq__(self, other):
+        if not isinstance(other, Version):
+            return NotImplemented
+        return self._key == other._key
+
+    def __gt__(self, other):
+        if not isinstance(other, Version):
+            return NotImplemented
+        return self._key > other._key
+
+def _cmpkey(release, patch_l, pre_l, pre_v):
+    # remove leading 0
+    _release = tuple(
+        reversed(list(itertools.dropwhile(lambda x: x == 0, reversed(release))))
+    )
+
+    _patch = patch_l.upper()
+
+    if pre_l is None and pre_v is None:
+        _pre = float('inf')
+    else:
+        _pre = float(pre_v) if pre_v else float('-inf')
+    return _release, _patch, _pre
+
+
+def get_patched_cves(d):
+    """
+    Get patches that solve CVEs using the "CVE: " tag.
+    """
+
+    import re
+    import oe.patch
+
+    cve_match = re.compile(r"CVE:( CVE-\d{4}-\d+)+")
+
+    # Matches the last "CVE-YYYY-ID" in the file name, also if written
+    # in lowercase. Possible to have multiple CVE IDs in a single
+    # file name, but only the last one will be detected from the file name.
+    # However, patch files contents addressing multiple CVE IDs are supported
+    # (cve_match regular expression)
+    cve_file_name_match = re.compile(r".*(CVE-\d{4}-\d+)", re.IGNORECASE)
+
+    patched_cves = set()
+    patches = oe.patch.src_patches(d)
+    bb.debug(2, "Scanning %d patches for CVEs" % len(patches))
+    for url in patches:
+        patch_file = bb.fetch.decodeurl(url)[2]
+
+        # Check patch file name for CVE ID
+        fname_match = cve_file_name_match.search(patch_file)
+        if fname_match:
+            cve = fname_match.group(1).upper()
+            patched_cves.add(cve)
+            bb.debug(2, "Found %s from patch file name %s" % (cve, patch_file))
+
+        # Remote patches won't be present and compressed patches won't be
+        # unpacked, so say we're not scanning them
+        if not os.path.isfile(patch_file):
+            bb.note("%s is remote or compressed, not scanning content" % patch_file)
+            continue
+
+        with open(patch_file, "r", encoding="utf-8") as f:
+            try:
+                patch_text = f.read()
+            except UnicodeDecodeError:
+                bb.debug(1, "Failed to read patch %s using UTF-8 encoding"
+                        " trying with iso8859-1" %  patch_file)
+                f.close()
+                with open(patch_file, "r", encoding="iso8859-1") as f:
+                    patch_text = f.read()
+
+        # Search for one or more "CVE: " lines
+        text_match = False
+        for match in cve_match.finditer(patch_text):
+            # Get only the CVEs without the "CVE: " tag
+            cves = patch_text[match.start()+5:match.end()]
+            for cve in cves.split():
+                bb.debug(2, "Patch %s solves %s" % (patch_file, cve))
+                patched_cves.add(cve)
+                text_match = True
+
+        if not fname_match and not text_match:
+            bb.debug(2, "Patch %s doesn't solve CVEs" % patch_file)
+
+    # Search for additional patched CVEs
+    for cve in (d.getVarFlags("CVE_STATUS") or {}):
+        decoded_status, _, _ = decode_cve_status(d, cve)
+        if decoded_status == "Patched":
+            bb.debug(2, "CVE %s is additionally patched" % cve)
+            patched_cves.add(cve)
+
+    return patched_cves
+
+
+def get_cpe_ids(cve_product, version):
+    """
+    Get list of CPE identifiers for the given product and version
+    """
+
+    version = version.split("+git")[0]
+
+    cpe_ids = []
+    for product in cve_product.split():
+        # CVE_PRODUCT in recipes may include vendor information for CPE identifiers. If not,
+        # use wildcard for vendor.
+        if ":" in product:
+            vendor, product = product.split(":", 1)
+        else:
+            vendor = "*"
+
+        cpe_id = 'cpe:2.3:*:{}:{}:{}:*:*:*:*:*:*:*'.format(vendor, product, version)
+        cpe_ids.append(cpe_id)
+
+    return cpe_ids
+
+def cve_check_merge_jsons(output, data):
+    """
+    Merge the data in the "package" property to the main data file
+    output
+    """
+    if output["version"] != data["version"]:
+        bb.error("Version mismatch when merging JSON outputs")
+        return
+
+    for product in output["package"]:
+        if product["name"] == data["package"][0]["name"]:
+            bb.error("Error adding the same package %s twice" % product["name"])
+            return
+
+    output["package"].append(data["package"][0])
+
+def update_symlinks(target_path, link_path):
+    """
+    Update a symbolic link link_path to point to target_path.
+    Remove the link and recreate it if exist and is different.
+    """
+    if link_path != target_path and os.path.exists(target_path):
+        if os.path.exists(os.path.realpath(link_path)):
+            os.remove(link_path)
+        os.symlink(os.path.basename(target_path), link_path)
+
+
+def convert_cve_version(version):
+    """
+    This function converts from CVE format to Yocto version format.
+    eg 8.3_p1 -> 8.3p1, 6.2_rc1 -> 6.2-rc1
+
+    Unless it is redefined using CVE_VERSION in the recipe,
+    cve_check uses the version in the name of the recipe (${PV})
+    to check vulnerabilities against a CVE in the database downloaded from NVD.
+
+    When the version has an update, i.e.
+    "p1" in OpenSSH 8.3p1,
+    "-rc1" in linux kernel 6.2-rc1,
+    the database stores the version as version_update (8.3_p1, 6.2_rc1).
+    Therefore, we must transform this version before comparing to the
+    recipe version.
+
+    In this case, the parameter of the function is 8.3_p1.
+    If the version uses the Release Candidate format, "rc",
+    this function replaces the '_' by '-'.
+    If the version uses the Update format, "p",
+    this function removes the '_' completely.
+    """
+    import re
+
+    matches = re.match('^([0-9.]+)_((p|rc)[0-9]+)$', version)
+
+    if not matches:
+        return version
+
+    version = matches.group(1)
+    update = matches.group(2)
+
+    if matches.group(3) == "rc":
+        return version + '-' + update
+
+    return version + update
+
+def decode_cve_status(d, cve):
+    """
+    Convert CVE_STATUS into status, detail and description.
+    """
+    status = d.getVarFlag("CVE_STATUS", cve)
+    if not status:
+        return ("", "", "")
+
+    status_split = status.split(':', 1)
+    detail = status_split[0]
+    description = status_split[1].strip() if (len(status_split) > 1) else ""
+
+    status_mapping = d.getVarFlag("CVE_CHECK_STATUSMAP", detail)
+    if status_mapping is None:
+        bb.warn('Invalid detail "%s" for CVE_STATUS[%s] = "%s", fallback to Unpatched' % (detail, cve, status))
+        status_mapping = "Unpatched"
+
+    return (status_mapping, detail, description)
diff --git a/meta-xilinx-core/lib/oe/data.py b/meta-xilinx-core/lib/oe/data.py
new file mode 100644
index 00000000..37121cfa
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/data.py
@@ -0,0 +1,53 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import json
+import oe.maketype
+
+def typed_value(key, d):
+    """Construct a value for the specified metadata variable, using its flags
+    to determine the type and parameters for construction."""
+    var_type = d.getVarFlag(key, 'type')
+    flags = d.getVarFlags(key)
+    if flags is not None:
+        flags = dict((flag, d.expand(value))
+                     for flag, value in list(flags.items()))
+    else:
+        flags = {}
+
+    try:
+        return oe.maketype.create(d.getVar(key) or '', var_type, **flags)
+    except (TypeError, ValueError) as exc:
+        bb.msg.fatal("Data", "%s: %s" % (key, str(exc)))
+
+def export2json(d, json_file, expand=True, searchString="",replaceString=""):
+    data2export = {}
+    keys2export = []
+
+    for key in d.keys():
+        if key.startswith("_"):
+            continue
+        elif key.startswith("BB"):
+            continue
+        elif key.startswith("B_pn"):
+            continue
+        elif key.startswith("do_"):
+            continue
+        elif d.getVarFlag(key, "func"):
+            continue
+
+        keys2export.append(key)
+
+    for key in keys2export:
+        try:
+            data2export[key] = d.getVar(key, expand).replace(searchString,replaceString)
+        except bb.data_smart.ExpansionError:
+            data2export[key] = ''
+        except AttributeError:
+            pass
+
+    with open(json_file, "w") as f:
+        json.dump(data2export, f, skipkeys=True, indent=4, sort_keys=True)
diff --git a/meta-xilinx-core/lib/oe/distro_check.py b/meta-xilinx-core/lib/oe/distro_check.py
new file mode 100644
index 00000000..3494520f
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/distro_check.py
@@ -0,0 +1,314 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+def create_socket(url, d):
+    import urllib
+    from bb.utils import export_proxies
+
+    export_proxies(d)
+    return urllib.request.urlopen(url)
+
+def get_links_from_url(url, d):
+    "Return all the href links found on the web location"
+
+    from bs4 import BeautifulSoup, SoupStrainer
+
+    soup = BeautifulSoup(create_socket(url,d), "html.parser", parse_only=SoupStrainer("a"))
+    hyperlinks = []
+    for line in soup.find_all('a', href=True):
+        hyperlinks.append(line['href'].strip('/'))
+    return hyperlinks
+
+def find_latest_numeric_release(url, d):
+    "Find the latest listed numeric release on the given url"
+    max=0
+    maxstr=""
+    for link in get_links_from_url(url, d):
+        try:
+            # TODO use bb.utils.vercmp_string_op()
+            release = float(link)
+        except:
+            release = 0
+        if release > max:
+            max = release
+            maxstr = link
+    return maxstr
+
+def is_src_rpm(name):
+    "Check if the link is pointing to a src.rpm file"
+    return name.endswith(".src.rpm")
+
+def package_name_from_srpm(srpm):
+    "Strip out the package name from the src.rpm filename"
+
+    # ca-certificates-2016.2.7-1.0.fc24.src.rpm
+    # ^name           ^ver     ^release^removed
+    (name, version, release) = srpm.replace(".src.rpm", "").rsplit("-", 2)
+    return name
+
+def get_source_package_list_from_url(url, section, d):
+    "Return a sectioned list of package names from a URL list"
+
+    bb.note("Reading %s: %s" % (url, section))
+    links = get_links_from_url(url, d)
+    srpms = filter(is_src_rpm, links)
+    names_list = map(package_name_from_srpm, srpms)
+
+    new_pkgs = set()
+    for pkgs in names_list:
+       new_pkgs.add(pkgs + ":" + section)
+    return new_pkgs
+
+def get_source_package_list_from_url_by_letter(url, section, d):
+    import string
+    from urllib.error import HTTPError
+    packages = set()
+    for letter in (string.ascii_lowercase + string.digits):
+        # Not all subfolders may exist, so silently handle 404
+        try:
+            packages |= get_source_package_list_from_url(url + "/" + letter, section, d)
+        except HTTPError as e:
+            if e.code != 404: raise
+    return packages
+
+def get_latest_released_fedora_source_package_list(d):
+    "Returns list of all the name os packages in the latest fedora distro"
+    latest = find_latest_numeric_release("http://archive.fedoraproject.org/pub/fedora/linux/releases/", d)
+    package_names = get_source_package_list_from_url_by_letter("http://archive.fedoraproject.org/pub/fedora/linux/releases/%s/Everything/source/tree/Packages/" % latest, "main", d)
+    package_names |= get_source_package_list_from_url_by_letter("http://archive.fedoraproject.org/pub/fedora/linux/updates/%s/SRPMS/" % latest, "updates", d)
+    return latest, package_names
+
+def get_latest_released_opensuse_source_package_list(d):
+    "Returns list of all the name os packages in the latest opensuse distro"
+    latest = find_latest_numeric_release("http://download.opensuse.org/source/distribution/leap", d)
+
+    package_names = get_source_package_list_from_url("http://download.opensuse.org/source/distribution/leap/%s/repo/oss/suse/src/" % latest, "main", d)
+    package_names |= get_source_package_list_from_url("http://download.opensuse.org/update/leap/%s/oss/src/" % latest, "updates", d)
+    return latest, package_names
+
+def get_latest_released_clear_source_package_list(d):
+    latest = find_latest_numeric_release("https://download.clearlinux.org/releases/", d)
+    package_names = get_source_package_list_from_url("https://download.clearlinux.org/releases/%s/clear/source/SRPMS/" % latest, "main", d)
+    return latest, package_names
+
+def find_latest_debian_release(url, d):
+    "Find the latest listed debian release on the given url"
+
+    releases = [link.replace("Debian", "")
+                for link in get_links_from_url(url, d)
+                if link.startswith("Debian")]
+    releases.sort()
+    try:
+        return releases[-1]
+    except:
+        return "_NotFound_"
+
+def get_debian_style_source_package_list(url, section, d):
+    "Return the list of package-names stored in the debian style Sources.gz file"
+    import gzip
+
+    package_names = set()
+    for line in gzip.open(create_socket(url, d), mode="rt"):
+        if line.startswith("Package:"):
+            pkg = line.split(":", 1)[1].strip()
+            package_names.add(pkg + ":" + section)
+    return package_names
+
+def get_latest_released_debian_source_package_list(d):
+    "Returns list of all the name of packages in the latest debian distro"
+    latest = find_latest_debian_release("http://ftp.debian.org/debian/dists/", d)
+    url = "http://ftp.debian.org/debian/dists/stable/main/source/Sources.gz"
+    package_names = get_debian_style_source_package_list(url, "main", d)
+    url = "http://ftp.debian.org/debian/dists/stable-proposed-updates/main/source/Sources.gz"
+    package_names |= get_debian_style_source_package_list(url, "updates", d)
+    return latest, package_names
+
+def find_latest_ubuntu_release(url, d):
+    """
+    Find the latest listed Ubuntu release on the given ubuntu/dists/ URL.
+
+    To avoid matching development releases look for distributions that have
+    updates, so the resulting distro could be any supported release.
+    """
+    url += "?C=M;O=D" # Descending Sort by Last Modified
+    for link in get_links_from_url(url, d):
+        if "-updates" in link:
+            distro = link.replace("-updates", "")
+            return distro
+    return "_NotFound_"
+
+def get_latest_released_ubuntu_source_package_list(d):
+    "Returns list of all the name os packages in the latest ubuntu distro"
+    latest = find_latest_ubuntu_release("http://archive.ubuntu.com/ubuntu/dists/", d)
+    url = "http://archive.ubuntu.com/ubuntu/dists/%s/main/source/Sources.gz" % latest
+    package_names = get_debian_style_source_package_list(url, "main", d)
+    url = "http://archive.ubuntu.com/ubuntu/dists/%s-updates/main/source/Sources.gz" % latest
+    package_names |= get_debian_style_source_package_list(url, "updates", d)
+    return latest, package_names
+
+def create_distro_packages_list(distro_check_dir, d):
+    import shutil
+
+    pkglst_dir = os.path.join(distro_check_dir, "package_lists")
+    bb.utils.remove(pkglst_dir, True)
+    bb.utils.mkdirhier(pkglst_dir)
+
+    per_distro_functions = (
+                            ("Debian", get_latest_released_debian_source_package_list),
+                            ("Ubuntu", get_latest_released_ubuntu_source_package_list),
+                            ("Fedora", get_latest_released_fedora_source_package_list),
+                            ("openSUSE", get_latest_released_opensuse_source_package_list),
+                            ("Clear", get_latest_released_clear_source_package_list),
+                           )
+
+    for name, fetcher_func in per_distro_functions:
+        try:
+            release, package_list = fetcher_func(d)
+        except Exception as e:
+            bb.warn("Cannot fetch packages for %s: %s" % (name, e))
+        bb.note("Distro: %s, Latest Release: %s, # src packages: %d" % (name, release, len(package_list)))
+        if len(package_list) == 0:
+            bb.error("Didn't fetch any packages for %s %s" % (name, release))
+
+        package_list_file = os.path.join(pkglst_dir, name + "-" + release)
+        with open(package_list_file, 'w') as f:
+            for pkg in sorted(package_list):
+                f.write(pkg + "\n")
+
+def update_distro_data(distro_check_dir, datetime, d):
+    """
+    If distro packages list data is old then rebuild it.
+    The operations has to be protected by a lock so that
+    only one thread performes it at a time.
+    """
+    if not os.path.isdir (distro_check_dir):
+        try:
+            bb.note ("Making new directory: %s" % distro_check_dir)
+            os.makedirs (distro_check_dir)
+        except OSError:
+            raise Exception('Unable to create directory %s' % (distro_check_dir))
+
+
+    datetime_file = os.path.join(distro_check_dir, "build_datetime")
+    saved_datetime = "_invalid_"
+    import fcntl
+    try:
+        if not os.path.exists(datetime_file):
+            open(datetime_file, 'w+').close() # touch the file so that the next open won't fail
+
+        f = open(datetime_file, "r+")
+        fcntl.lockf(f, fcntl.LOCK_EX)
+        saved_datetime = f.read()
+        if saved_datetime[0:8] != datetime[0:8]:
+            bb.note("The build datetime did not match: saved:%s current:%s" % (saved_datetime, datetime))
+            bb.note("Regenerating distro package lists")
+            create_distro_packages_list(distro_check_dir, d)
+            f.seek(0)
+            f.write(datetime)
+
+    except OSError as e:
+        raise Exception('Unable to open timestamp: %s' % e)
+    finally:
+        fcntl.lockf(f, fcntl.LOCK_UN)
+        f.close()
+
+def compare_in_distro_packages_list(distro_check_dir, d):
+    if not os.path.isdir(distro_check_dir):
+        raise Exception("compare_in_distro_packages_list: invalid distro_check_dir passed")
+
+    localdata = bb.data.createCopy(d)
+    pkglst_dir = os.path.join(distro_check_dir, "package_lists")
+    matching_distros = []
+    pn = recipe_name = d.getVar('PN')
+    bb.note("Checking: %s" % pn)
+
+    if pn.find("-native") != -1:
+        pnstripped = pn.split("-native")
+        localdata.setVar('OVERRIDES', "pn-" + pnstripped[0] + ":" + d.getVar('OVERRIDES'))
+        recipe_name = pnstripped[0]
+
+    if pn.startswith("nativesdk-"):
+        pnstripped = pn.split("nativesdk-")
+        localdata.setVar('OVERRIDES', "pn-" + pnstripped[1] + ":" + d.getVar('OVERRIDES'))
+        recipe_name = pnstripped[1]
+
+    if pn.find("-cross") != -1:
+        pnstripped = pn.split("-cross")
+        localdata.setVar('OVERRIDES', "pn-" + pnstripped[0] + ":" + d.getVar('OVERRIDES'))
+        recipe_name = pnstripped[0]
+
+    if pn.find("-initial") != -1:
+        pnstripped = pn.split("-initial")
+        localdata.setVar('OVERRIDES', "pn-" + pnstripped[0] + ":" + d.getVar('OVERRIDES'))
+        recipe_name = pnstripped[0]
+
+    bb.note("Recipe: %s" % recipe_name)
+
+    distro_exceptions = dict({"OE-Core":'OE-Core', "OpenedHand":'OpenedHand', "Intel":'Intel', "Upstream":'Upstream', "Windriver":'Windriver', "OSPDT":'OSPDT Approved', "Poky":'poky'})
+    tmp = localdata.getVar('DISTRO_PN_ALIAS') or ""
+    for str in tmp.split():
+        if str and str.find("=") == -1 and distro_exceptions[str]:
+            matching_distros.append(str)
+
+    distro_pn_aliases = {}
+    for str in tmp.split():
+        if "=" in str:
+            (dist, pn_alias) = str.split('=')
+            distro_pn_aliases[dist.strip().lower()] = pn_alias.strip()
+
+    for file in os.listdir(pkglst_dir):
+        (distro, distro_release) = file.split("-")
+        f = open(os.path.join(pkglst_dir, file), "r")
+        for line in f:
+            (pkg, section) = line.split(":")
+            if distro.lower() in distro_pn_aliases:
+                pn = distro_pn_aliases[distro.lower()]
+            else:
+                pn = recipe_name
+            if pn == pkg:
+                matching_distros.append(distro + "-" + section[:-1]) # strip the \n at the end
+                f.close()
+                break
+        f.close()
+
+    for item in tmp.split():
+        matching_distros.append(item)
+    bb.note("Matching: %s" % matching_distros)
+    return matching_distros
+
+def create_log_file(d, logname):
+    logpath = d.getVar('LOG_DIR')
+    bb.utils.mkdirhier(logpath)
+    logfn, logsuffix = os.path.splitext(logname)
+    logfile = os.path.join(logpath, "%s.%s%s" % (logfn, d.getVar('DATETIME'), logsuffix))
+    if not os.path.exists(logfile):
+            slogfile = os.path.join(logpath, logname)
+            if os.path.exists(slogfile):
+                    os.remove(slogfile)
+            open(logfile, 'w+').close()
+            os.symlink(logfile, slogfile)
+            d.setVar('LOG_FILE', logfile)
+    return logfile
+
+
+def save_distro_check_result(result, datetime, result_file, d):
+    pn = d.getVar('PN')
+    logdir = d.getVar('LOG_DIR')
+    if not logdir:
+        bb.error("LOG_DIR variable is not defined, can't write the distro_check results")
+        return
+    bb.utils.mkdirhier(logdir)
+
+    line = pn
+    for i in result:
+        line = line + "," + i
+    f = open(result_file, "a")
+    import fcntl
+    fcntl.lockf(f, fcntl.LOCK_EX)
+    f.seek(0, os.SEEK_END) # seek to the end of file
+    f.write(line + "\n")
+    fcntl.lockf(f, fcntl.LOCK_UN)
+    f.close()
diff --git a/meta-xilinx-core/lib/oe/elf.py b/meta-xilinx-core/lib/oe/elf.py
new file mode 100644
index 00000000..eab2349a
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/elf.py
@@ -0,0 +1,145 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+def machine_dict(d):
+#           TARGET_OS  TARGET_ARCH   MACHINE, OSABI, ABIVERSION, Little Endian, 32bit?
+    machdata = {
+            "darwin9" : { 
+                        "arm" :       (40,     0,    0,          True,          32),
+                      },
+            "eabi" : {
+                        "arm" :       (40,     0,    0,          True,          32),
+                      },
+            "elf" : {
+                        "aarch64" :   (183,    0,    0,          True,          64),
+                        "aarch64_be" :(183,    0,    0,          False,         64),
+                        "i586" :      (3,      0,    0,          True,          32),
+                        "i686" :      (3,      0,    0,          True,          32),
+                        "x86_64":     (62,     0,    0,          True,          64),
+                        "epiphany":   (4643,   0,    0,          True,          32),
+                        "lm32":       (138,    0,    0,          False,         32),
+                        "loongarch64":(258,    0,    0,          True,          64),
+                        "mips":       ( 8,     0,    0,          False,         32),
+                        "mipsel":     ( 8,     0,    0,          True,          32),
+                        "microblaze":  (189,   0,    0,          False,         32),
+                        "microblazeel":(189,   0,    0,          True,          32),
+                        "powerpc":    (20,     0,    0,          False,         32),
+                        "riscv32":    (243,    0,    0,          True,          32),
+                        "riscv64":    (243,    0,    0,          True,          64),
+                      },
+            "linux" : { 
+                        "aarch64" :   (183,    0,    0,          True,          64),
+                        "aarch64_be" :(183,    0,    0,          False,         64),
+                        "arm" :       (40,    97,    0,          True,          32),
+                        "armeb":      (40,    97,    0,          False,         32),
+                        "powerpc":    (20,     0,    0,          False,         32),
+                        "powerpc64":  (21,     0,    0,          False,         64),
+                        "powerpc64le":  (21,     0,    0,          True,         64),
+                        "i386":       ( 3,     0,    0,          True,          32),
+                        "i486":       ( 3,     0,    0,          True,          32),
+                        "i586":       ( 3,     0,    0,          True,          32),
+                        "i686":       ( 3,     0,    0,          True,          32),
+                        "x86_64":     (62,     0,    0,          True,          64),
+                        "ia64":       (50,     0,    0,          True,          64),
+                        "alpha":      (36902,  0,    0,          True,          64),
+                        "hppa":       (15,     3,    0,          False,         32),
+                        "loongarch64":(258,    0,    0,          True,          64),
+                        "m68k":       ( 4,     0,    0,          False,         32),
+                        "mips":       ( 8,     0,    0,          False,         32),
+                        "mipsel":     ( 8,     0,    0,          True,          32),
+                        "mips64":     ( 8,     0,    0,          False,         64),
+                        "mips64el":   ( 8,     0,    0,          True,          64),
+                        "mipsisa32r6":   ( 8,  0,    0,          False,         32),
+                        "mipsisa32r6el": ( 8,  0,    0,          True,          32),
+                        "mipsisa64r6":   ( 8,  0,    0,          False,         64),
+                        "mipsisa64r6el": ( 8,  0,    0,          True,          64),
+                        "nios2":      (113,    0,    0,          True,          32),
+                        "riscv32":    (243,    0,    0,          True,          32),
+                        "riscv64":    (243,    0,    0,          True,          64),
+                        "s390":       (22,     0,    0,          False,         32),
+                        "sh4":        (42,     0,    0,          True,          32),
+                        "sparc":      ( 2,     0,    0,          False,         32),
+                        "microblaze":  (189,   0,    0,          False,         32),
+                        "microblazeel":(189,   0,    0,          True,          32),
+                      },
+            "linux-android" : {
+                        "aarch64" :   (183,    0,    0,          True,          64),
+                        "i686":       ( 3,     0,    0,          True,          32),
+                        "x86_64":     (62,     0,    0,          True,          64),
+                      },
+            "linux-androideabi" : {
+                        "arm" :       (40,    97,    0,          True,          32),
+                      },
+            "linux-musl" : { 
+                        "aarch64" :   (183,    0,    0,            True,          64),
+                        "aarch64_be" :(183,    0,    0,            False,         64),
+                        "arm" :       (  40,    97,    0,          True,          32),
+                        "armeb":      (  40,    97,    0,          False,         32),
+                        "powerpc":    (  20,     0,    0,          False,         32),
+                        "powerpc64":  (  21,     0,    0,          False,         64),
+                        "powerpc64le":  (21,     0,    0,          True,         64),
+                        "i386":       (   3,     0,    0,          True,          32),
+                        "i486":       (   3,     0,    0,          True,          32),
+                        "i586":       (   3,     0,    0,          True,          32),
+                        "i686":       (   3,     0,    0,          True,          32),
+                        "x86_64":     (  62,     0,    0,          True,          64),
+                        "mips":       (   8,     0,    0,          False,         32),
+                        "mipsel":     (   8,     0,    0,          True,          32),
+                        "mips64":     (   8,     0,    0,          False,         64),
+                        "mips64el":   (   8,     0,    0,          True,          64),
+                        "microblaze":  (189,     0,    0,          False,         32),
+                        "microblazeel":(189,     0,    0,          True,          32),
+                        "riscv32":    (243,      0,    0,          True,          32),
+                        "riscv64":    (243,      0,    0,          True,          64),
+                        "sh4":        (  42,     0,    0,          True,          32),
+                      },
+            "uclinux-uclibc" : {
+                        "bfin":       ( 106,     0,    0,          True,         32),
+                      }, 
+            "linux-gnueabi" : {
+                        "arm" :       (40,     0,    0,          True,          32),
+                        "armeb" :     (40,     0,    0,          False,         32),
+                      },
+            "linux-musleabi" : {
+                        "arm" :       (40,     0,    0,          True,          32),
+                        "armeb" :     (40,     0,    0,          False,         32),
+                      },
+            "linux-gnuspe" : {
+                        "powerpc":    (20,     0,    0,          False,         32),
+                      },
+            "linux-muslspe" : {
+                        "powerpc":    (20,     0,    0,          False,         32),
+                      },
+            "linux-gnu" :       {
+                        "powerpc":    (20,     0,    0,          False,         32),
+                        "sh4":        (42,     0,    0,          True,          32),
+                      },
+            "linux-gnu_ilp32" :     {
+                        "aarch64" :   (183,    0,    0,          True,          32),
+                      },
+            "linux-gnux32" :       {
+                        "x86_64":     (62,     0,    0,          True,          32),
+                      },
+            "linux-muslx32" :       {
+                        "x86_64":     (62,     0,    0,          True,          32),
+                      },
+            "linux-gnun32" :       {
+                        "mips64":       ( 8,     0,    0,          False,         32),
+                        "mips64el":     ( 8,     0,    0,          True,          32),
+                        "mipsisa64r6":  ( 8,     0,    0,          False,         32),
+                        "mipsisa64r6el":( 8,     0,    0,          True,          32),
+                      },
+        }
+
+    # Add in any extra user supplied data which may come from a BSP layer, removing the
+    # need to always change this class directly
+    extra_machdata = (d and d.getVar("PACKAGEQA_EXTRA_MACHDEFFUNCS" or None) or "").split()
+    for m in extra_machdata:
+        call = m + "(machdata, d)"
+        locs = { "machdata" : machdata, "d" : d}
+        machdata = bb.utils.better_eval(call, locs)
+
+    return machdata
diff --git a/meta-xilinx-core/lib/oe/go.py b/meta-xilinx-core/lib/oe/go.py
new file mode 100644
index 00000000..dfd957d1
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/go.py
@@ -0,0 +1,34 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: MIT
+#
+
+import re
+
+def map_arch(a):
+    if re.match('i.86', a):
+        return '386'
+    elif a == 'x86_64':
+        return 'amd64'
+    elif re.match('arm.*', a):
+        return 'arm'
+    elif re.match('aarch64.*', a):
+        return 'arm64'
+    elif re.match('mips64el.*', a):
+        return 'mips64le'
+    elif re.match('mips64.*', a):
+        return 'mips64'
+    elif a == 'mips':
+        return 'mips'
+    elif a == 'mipsel':
+        return 'mipsle'
+    elif re.match('p(pc|owerpc)(64le)', a):
+        return 'ppc64le'
+    elif re.match('p(pc|owerpc)(64)', a):
+        return 'ppc64'
+    elif a == 'riscv64':
+        return 'riscv64'
+    elif a == 'loongarch64':
+        return 'loong64'
+    return ''
diff --git a/meta-xilinx-core/lib/oe/gpg_sign.py b/meta-xilinx-core/lib/oe/gpg_sign.py
new file mode 100644
index 00000000..ede6186c
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/gpg_sign.py
@@ -0,0 +1,160 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+"""Helper module for GPG signing"""
+
+import bb
+import os
+import shlex
+import subprocess
+import tempfile
+
+class LocalSigner(object):
+    """Class for handling local (on the build host) signing"""
+    def __init__(self, d):
+        self.gpg_bin = d.getVar('GPG_BIN') or \
+                  bb.utils.which(os.getenv('PATH'), 'gpg')
+        self.gpg_cmd = [self.gpg_bin]
+        self.gpg_agent_bin = bb.utils.which(os.getenv('PATH'), "gpg-agent")
+        # Without this we see "Cannot allocate memory" errors when running processes in parallel
+        # It needs to be set for any gpg command since any agent launched can stick around in memory
+        # and this parameter must be set.
+        if self.gpg_agent_bin:
+            self.gpg_cmd += ["--agent-program=%s|--auto-expand-secmem" % (self.gpg_agent_bin)]
+        self.gpg_path = d.getVar('GPG_PATH')
+        self.rpm_bin = bb.utils.which(os.getenv('PATH'), "rpmsign")
+        self.gpg_version = self.get_gpg_version()
+
+
+    def export_pubkey(self, output_file, keyid, armor=True):
+        """Export GPG public key to a file"""
+        cmd = self.gpg_cmd + ["--no-permission-warning", "--batch", "--yes", "--export", "-o", output_file]
+        if self.gpg_path:
+            cmd += ["--homedir", self.gpg_path]
+        if armor:
+            cmd += ["--armor"]
+        cmd += [keyid]
+        subprocess.check_output(cmd, stderr=subprocess.STDOUT)
+
+    def sign_rpms(self, files, keyid, passphrase, digest, sign_chunk, fsk=None, fsk_password=None):
+        """Sign RPM files"""
+
+        cmd = self.rpm_bin + " --addsign --define '_gpg_name %s'  " % keyid
+        gpg_args = '--no-permission-warning --batch --passphrase=%s --agent-program=%s|--auto-expand-secmem' % (passphrase, self.gpg_agent_bin)
+        if self.gpg_version > (2,1,):
+            gpg_args += ' --pinentry-mode=loopback'
+        cmd += "--define '_gpg_sign_cmd_extra_args %s' " % gpg_args
+        cmd += "--define '_binary_filedigest_algorithm %s' " % digest
+        if self.gpg_bin:
+            cmd += "--define '__gpg %s' " % self.gpg_bin
+        if self.gpg_path:
+            cmd += "--define '_gpg_path %s' " % self.gpg_path
+        if fsk:
+            cmd += "--signfiles --fskpath %s " % fsk
+            if fsk_password:
+                cmd += "--define '_file_signing_key_password %s' " % fsk_password
+
+        # Sign in chunks
+        for i in range(0, len(files), sign_chunk):
+            subprocess.check_output(shlex.split(cmd + ' '.join(files[i:i+sign_chunk])), stderr=subprocess.STDOUT)
+
+    def detach_sign(self, input_file, keyid, passphrase_file, passphrase=None, armor=True, output_suffix=None, use_sha256=False):
+        """Create a detached signature of a file"""
+
+        if passphrase_file and passphrase:
+            raise Exception("You should use either passphrase_file of passphrase, not both")
+
+        cmd = self.gpg_cmd + ['--detach-sign', '--no-permission-warning', '--batch',
+               '--no-tty', '--yes', '--passphrase-fd', '0', '-u', keyid]
+
+        if self.gpg_path:
+            cmd += ['--homedir', self.gpg_path]
+        if armor:
+            cmd += ['--armor']
+        if use_sha256:
+            cmd += ['--digest-algo', "SHA256"]
+
+        #gpg > 2.1 supports password pipes only through the loopback interface
+        #gpg < 2.1 errors out if given unknown parameters
+        if self.gpg_version > (2,1,):
+            cmd += ['--pinentry-mode', 'loopback']
+
+        try:
+            if passphrase_file:
+                with open(passphrase_file) as fobj:
+                    passphrase = fobj.readline();
+
+            if not output_suffix:
+                output_suffix = 'asc' if armor else 'sig'
+            output_file = input_file + "." + output_suffix
+            with tempfile.TemporaryDirectory(dir=os.path.dirname(output_file)) as tmp_dir:
+                tmp_file = os.path.join(tmp_dir, os.path.basename(output_file))
+                cmd += ['-o', tmp_file]
+
+                cmd += [input_file]
+
+                job = subprocess.Popen(cmd, stdin=subprocess.PIPE, stderr=subprocess.PIPE)
+                (_, stderr) = job.communicate(passphrase.encode("utf-8"))
+
+                if job.returncode:
+                    bb.fatal("GPG exited with code %d: %s" % (job.returncode, stderr.decode("utf-8")))
+
+                os.rename(tmp_file, output_file)
+        except IOError as e:
+            bb.error("IO error (%s): %s" % (e.errno, e.strerror))
+            raise Exception("Failed to sign '%s'" % input_file)
+
+        except OSError as e:
+            bb.error("OS error (%s): %s" % (e.errno, e.strerror))
+            raise Exception("Failed to sign '%s" % input_file)
+
+
+    def get_gpg_version(self):
+        """Return the gpg version as a tuple of ints"""
+        try:
+            cmd = self.gpg_cmd + ["--version", "--no-permission-warning"]
+            ver_str = subprocess.check_output(cmd).split()[2].decode("utf-8")
+            return tuple([int(i) for i in ver_str.split("-")[0].split('.')])
+        except subprocess.CalledProcessError as e:
+            bb.fatal("Could not get gpg version: %s" % e)
+
+
+    def verify(self, sig_file, valid_sigs = ''):
+        """Verify signature"""
+        cmd = self.gpg_cmd + ["--verify", "--no-permission-warning", "--status-fd", "1"]
+        if self.gpg_path:
+            cmd += ["--homedir", self.gpg_path]
+
+        cmd += [sig_file]
+        status = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        # Valid if any key matches if unspecified
+        if not valid_sigs:
+            ret = False if status.returncode else True
+            return ret
+
+        import re
+        goodsigs = []
+        sigre = re.compile(r'^\[GNUPG:\] GOODSIG (\S+)\s(.*)$')
+        for l in status.stdout.decode("utf-8").splitlines():
+            s = sigre.match(l)
+            if s:
+                goodsigs += [s.group(1)]
+
+        for sig in valid_sigs.split():
+            if sig in goodsigs:
+                return True
+        if len(goodsigs):
+            bb.warn('No accepted signatures found. Good signatures found: %s.' % ' '.join(goodsigs))
+        return False
+
+
+def get_signer(d, backend):
+    """Get signer object for the specified backend"""
+    # Use local signing by default
+    if backend == 'local':
+        return LocalSigner(d)
+    else:
+        bb.fatal("Unsupported signing backend '%s'" % backend)
diff --git a/meta-xilinx-core/lib/oe/license.py b/meta-xilinx-core/lib/oe/license.py
new file mode 100644
index 00000000..d9c8d94d
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/license.py
@@ -0,0 +1,261 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+"""Code for parsing OpenEmbedded license strings"""
+
+import ast
+import re
+from fnmatch import fnmatchcase as fnmatch
+
+def license_ok(license, dont_want_licenses):
+    """ Return False if License exist in dont_want_licenses else True """
+    for dwl in dont_want_licenses:
+        if fnmatch(license, dwl):
+            return False
+    return True
+
+def obsolete_license_list():
+    return ["AGPL-3", "AGPL-3+", "AGPLv3", "AGPLv3+", "AGPLv3.0", "AGPLv3.0+", "AGPL-3.0", "AGPL-3.0+", "BSD-0-Clause",
+            "GPL-1", "GPL-1+", "GPLv1", "GPLv1+", "GPLv1.0", "GPLv1.0+", "GPL-1.0", "GPL-1.0+", "GPL-2", "GPL-2+", "GPLv2",
+            "GPLv2+", "GPLv2.0", "GPLv2.0+", "GPL-2.0", "GPL-2.0+", "GPL-3", "GPL-3+", "GPLv3", "GPLv3+", "GPLv3.0", "GPLv3.0+",
+            "GPL-3.0", "GPL-3.0+", "LGPLv2", "LGPLv2+", "LGPLv2.0", "LGPLv2.0+", "LGPL-2.0", "LGPL-2.0+", "LGPL2.1", "LGPL2.1+",
+            "LGPLv2.1", "LGPLv2.1+", "LGPL-2.1", "LGPL-2.1+", "LGPLv3", "LGPLv3+", "LGPL-3.0", "LGPL-3.0+", "MPL-1", "MPLv1",
+            "MPLv1.1", "MPLv2", "MIT-X", "MIT-style", "openssl", "PSF", "PSFv2", "Python-2", "Apachev2", "Apache-2", "Artisticv1",
+            "Artistic-1", "AFL-2", "AFL-1", "AFLv2", "AFLv1", "CDDLv1", "CDDL-1", "EPLv1.0", "FreeType", "Nauman",
+            "tcl", "vim", "SGIv1"]
+
+class LicenseError(Exception):
+    pass
+
+class LicenseSyntaxError(LicenseError):
+    def __init__(self, licensestr, exc):
+        self.licensestr = licensestr
+        self.exc = exc
+        LicenseError.__init__(self)
+
+    def __str__(self):
+        return "error in '%s': %s" % (self.licensestr, self.exc)
+
+class InvalidLicense(LicenseError):
+    def __init__(self, license):
+        self.license = license
+        LicenseError.__init__(self)
+
+    def __str__(self):
+        return "invalid characters in license '%s'" % self.license
+
+license_operator_chars = '&|() '
+license_operator = re.compile(r'([' + license_operator_chars + '])')
+license_pattern = re.compile(r'[a-zA-Z0-9.+_\-]+$')
+
+class LicenseVisitor(ast.NodeVisitor):
+    """Get elements based on OpenEmbedded license strings"""
+    def get_elements(self, licensestr):
+        new_elements = []
+        elements = list([x for x in license_operator.split(licensestr) if x.strip()])
+        for pos, element in enumerate(elements):
+            if license_pattern.match(element):
+                if pos > 0 and license_pattern.match(elements[pos-1]):
+                    new_elements.append('&')
+                element = '"' + element + '"'
+            elif not license_operator.match(element):
+                raise InvalidLicense(element)
+            new_elements.append(element)
+
+        return new_elements
+
+    """Syntax tree visitor which can accept elements previously generated with
+    OpenEmbedded license string"""
+    def visit_elements(self, elements):
+        self.visit(ast.parse(' '.join(elements)))
+
+    """Syntax tree visitor which can accept OpenEmbedded license strings"""
+    def visit_string(self, licensestr):
+        self.visit_elements(self.get_elements(licensestr))
+
+class FlattenVisitor(LicenseVisitor):
+    """Flatten a license tree (parsed from a string) by selecting one of each
+    set of OR options, in the way the user specifies"""
+    def __init__(self, choose_licenses):
+        self.choose_licenses = choose_licenses
+        self.licenses = []
+        LicenseVisitor.__init__(self)
+
+    def visit_Str(self, node):
+        self.licenses.append(node.s)
+
+    def visit_Constant(self, node):
+        self.licenses.append(node.value)
+
+    def visit_BinOp(self, node):
+        if isinstance(node.op, ast.BitOr):
+            left = FlattenVisitor(self.choose_licenses)
+            left.visit(node.left)
+
+            right = FlattenVisitor(self.choose_licenses)
+            right.visit(node.right)
+
+            selected = self.choose_licenses(left.licenses, right.licenses)
+            self.licenses.extend(selected)
+        else:
+            self.generic_visit(node)
+
+def flattened_licenses(licensestr, choose_licenses):
+    """Given a license string and choose_licenses function, return a flat list of licenses"""
+    flatten = FlattenVisitor(choose_licenses)
+    try:
+        flatten.visit_string(licensestr)
+    except SyntaxError as exc:
+        raise LicenseSyntaxError(licensestr, exc)
+    return flatten.licenses
+
+def is_included(licensestr, include_licenses=None, exclude_licenses=None):
+    """Given a license string, a list of licenses to include and a list of
+    licenses to exclude, determine if the license string matches the include
+    list and does not match the exclude list.
+
+    Returns a tuple holding the boolean state and a list of the applicable
+    licenses that were excluded if state is False, or the licenses that were
+    included if the state is True."""
+
+    def include_license(license):
+        return any(fnmatch(license, pattern) for pattern in include_licenses)
+
+    def exclude_license(license):
+        return any(fnmatch(license, pattern) for pattern in exclude_licenses)
+
+    def choose_licenses(alpha, beta):
+        """Select the option in an OR which is the 'best' (has the most
+        included licenses and no excluded licenses)."""
+        # The factor 1000 below is arbitrary, just expected to be much larger
+        # than the number of licenses actually specified. That way the weight
+        # will be negative if the list of licenses contains an excluded license,
+        # but still gives a higher weight to the list with the most included
+        # licenses.
+        alpha_weight = (len(list(filter(include_license, alpha))) -
+                        1000 * (len(list(filter(exclude_license, alpha))) > 0))
+        beta_weight = (len(list(filter(include_license, beta))) -
+                       1000 * (len(list(filter(exclude_license, beta))) > 0))
+        if alpha_weight >= beta_weight:
+            return alpha
+        else:
+            return beta
+
+    if not include_licenses:
+        include_licenses = ['*']
+
+    if not exclude_licenses:
+        exclude_licenses = []
+
+    licenses = flattened_licenses(licensestr, choose_licenses)
+    excluded = [lic for lic in licenses if exclude_license(lic)]
+    included = [lic for lic in licenses if include_license(lic)]
+    if excluded:
+        return False, excluded
+    else:
+        return True, included
+
+class ManifestVisitor(LicenseVisitor):
+    """Walk license tree (parsed from a string) removing the incompatible
+    licenses specified"""
+    def __init__(self, dont_want_licenses, canonical_license, d):
+        self._dont_want_licenses = dont_want_licenses
+        self._canonical_license = canonical_license
+        self._d = d
+        self._operators = []
+
+        self.licenses = []
+        self.licensestr = ''
+
+        LicenseVisitor.__init__(self)
+
+    def visit(self, node):
+        if isinstance(node, ast.Str):
+            lic = node.s
+
+            if license_ok(self._canonical_license(self._d, lic),
+                    self._dont_want_licenses) == True:
+                if self._operators:
+                    ops = []
+                    for op in self._operators:
+                        if op == '[':
+                            ops.append(op)
+                        elif op == ']':
+                            ops.append(op)
+                        else:
+                            if not ops:
+                                ops.append(op)
+                            elif ops[-1] in ['[', ']']:
+                                ops.append(op)
+                            else:
+                                ops[-1] = op 
+
+                    for op in ops:
+                        if op == '[' or op == ']':
+                            self.licensestr += op
+                        elif self.licenses:
+                            self.licensestr += ' ' + op + ' '
+
+                    self._operators = []
+
+                self.licensestr += lic
+                self.licenses.append(lic)
+        elif isinstance(node, ast.BitAnd):
+            self._operators.append("&")
+        elif isinstance(node, ast.BitOr):
+            self._operators.append("|")
+        elif isinstance(node, ast.List):
+            self._operators.append("[")
+        elif isinstance(node, ast.Load):
+            self.licensestr += "]"
+
+        self.generic_visit(node)
+
+def manifest_licenses(licensestr, dont_want_licenses, canonical_license, d):
+    """Given a license string and dont_want_licenses list,
+       return license string filtered and a list of licenses"""
+    manifest = ManifestVisitor(dont_want_licenses, canonical_license, d)
+
+    try:
+        elements = manifest.get_elements(licensestr)
+
+        # Replace '()' to '[]' for handle in ast as List and Load types.
+        elements = ['[' if e == '(' else e for e in elements]
+        elements = [']' if e == ')' else e for e in elements]
+
+        manifest.visit_elements(elements)
+    except SyntaxError as exc:
+        raise LicenseSyntaxError(licensestr, exc)
+
+    # Replace '[]' to '()' for output correct license.
+    manifest.licensestr = manifest.licensestr.replace('[', '(').replace(']', ')')
+
+    return (manifest.licensestr, manifest.licenses)
+
+class ListVisitor(LicenseVisitor):
+    """Record all different licenses found in the license string"""
+    def __init__(self):
+        self.licenses = set()
+
+    def visit_Str(self, node):
+        self.licenses.add(node.s)
+
+    def visit_Constant(self, node):
+        self.licenses.add(node.value)
+
+def list_licenses(licensestr):
+    """Simply get a list of all licenses mentioned in a license string.
+       Binary operators are not applied or taken into account in any way"""
+    visitor = ListVisitor()
+    try:
+        visitor.visit_string(licensestr)
+    except SyntaxError as exc:
+        raise LicenseSyntaxError(licensestr, exc)
+    return visitor.licenses
+
+def apply_pkg_license_exception(pkg, bad_licenses, exceptions):
+    """Return remaining bad licenses after removing any package exceptions"""
+
+    return [lic for lic in bad_licenses if pkg + ':' + lic not in exceptions]
diff --git a/meta-xilinx-core/lib/oe/lsb.py b/meta-xilinx-core/lib/oe/lsb.py
new file mode 100644
index 00000000..3ec03e50
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/lsb.py
@@ -0,0 +1,123 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+def get_os_release():
+    """Get all key-value pairs from /etc/os-release as a dict"""
+    from collections import OrderedDict
+
+    data = OrderedDict()
+    if os.path.exists('/etc/os-release'):
+        with open('/etc/os-release') as f:
+            for line in f:
+                try:
+                    key, val = line.rstrip().split('=', 1)
+                except ValueError:
+                    continue
+                data[key.strip()] = val.strip('"')
+    return data
+
+def release_dict_osr():
+    """ Populate a dict with pertinent values from /etc/os-release """
+    data = {}
+    os_release = get_os_release()
+    if 'ID' in os_release:
+        data['DISTRIB_ID'] = os_release['ID']
+    if 'VERSION_ID' in os_release:
+        data['DISTRIB_RELEASE'] = os_release['VERSION_ID']
+
+    return data
+
+def release_dict_lsb():
+    """ Return the output of lsb_release -ir as a dictionary """
+    from subprocess import PIPE
+
+    try:
+        output, err = bb.process.run(['lsb_release', '-ir'], stderr=PIPE)
+    except bb.process.CmdError as exc:
+        return {}
+
+    lsb_map = { 'Distributor ID': 'DISTRIB_ID',
+                'Release': 'DISTRIB_RELEASE'}
+    lsb_keys = lsb_map.keys()
+
+    data = {}
+    for line in output.splitlines():
+        if line.startswith("-e"):
+            line = line[3:]
+        try:
+            key, value = line.split(":\t", 1)
+        except ValueError:
+            continue
+        if key in lsb_keys:
+            data[lsb_map[key]] = value
+
+    if len(data.keys()) != 2:
+        return None
+
+    return data
+
+def release_dict_file():
+    """ Try to gather release information manually when other methods fail """
+    data = {}
+    try:
+        if os.path.exists('/etc/lsb-release'):
+            data = {}
+            with open('/etc/lsb-release') as f:
+                for line in f:
+                    key, value = line.split("=", 1)
+                    data[key] = value.strip()
+        elif os.path.exists('/etc/redhat-release'):
+            data = {}
+            with open('/etc/redhat-release') as f:
+                distro = f.readline().strip()
+            import re
+            match = re.match(r'(.*) release (.*) \((.*)\)', distro)
+            if match:
+                data['DISTRIB_ID'] = match.group(1)
+                data['DISTRIB_RELEASE'] = match.group(2)
+        elif os.path.exists('/etc/SuSE-release'):
+            data = {}
+            data['DISTRIB_ID'] = 'SUSE LINUX'
+            with open('/etc/SuSE-release') as f:
+                for line in f:
+                    if line.startswith('VERSION = '):
+                        data['DISTRIB_RELEASE'] = line[10:].rstrip()
+                        break
+
+    except IOError:
+        return {}
+    return data
+
+def distro_identifier(adjust_hook=None):
+    """Return a distro identifier string based upon lsb_release -ri,
+       with optional adjustment via a hook"""
+
+    import re
+
+    # Try /etc/os-release first, then the output of `lsb_release -ir` and
+    # finally fall back on parsing various release files in order to determine
+    # host distro name and version.
+    distro_data = release_dict_osr()
+    if not distro_data:
+        distro_data = release_dict_lsb()
+    if not distro_data:
+        distro_data = release_dict_file()
+
+    distro_id = distro_data.get('DISTRIB_ID', '')
+    release = distro_data.get('DISTRIB_RELEASE', '')
+
+    if adjust_hook:
+        distro_id, release = adjust_hook(distro_id, release)
+    if not distro_id:
+        return "unknown"
+    # Filter out any non-alphanumerics and convert to lowercase
+    distro_id = re.sub(r'\W', '', distro_id).lower()
+
+    if release:
+        id_str = '{0}-{1}'.format(distro_id, release)
+    else:
+        id_str = distro_id
+    return id_str.replace(' ','-').replace('/','-')
diff --git a/meta-xilinx-core/lib/oe/maketype.py b/meta-xilinx-core/lib/oe/maketype.py
new file mode 100644
index 00000000..7a83bdf6
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/maketype.py
@@ -0,0 +1,107 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+"""OpenEmbedded variable typing support
+
+Types are defined in the metadata by name, using the 'type' flag on a
+variable.  Other flags may be utilized in the construction of the types.  See
+the arguments of the type's factory for details.
+"""
+
+import inspect
+import oe.types as types
+from collections.abc import Callable
+
+available_types = {}
+
+class MissingFlag(TypeError):
+    """A particular flag is required to construct the type, but has not been
+    provided."""
+    def __init__(self, flag, type):
+        self.flag = flag
+        self.type = type
+        TypeError.__init__(self)
+
+    def __str__(self):
+        return "Type '%s' requires flag '%s'" % (self.type, self.flag)
+
+def factory(var_type):
+    """Return the factory for a specified type."""
+    if var_type is None:
+        raise TypeError("No type specified. Valid types: %s" %
+                        ', '.join(available_types))
+    try:
+        return available_types[var_type]
+    except KeyError:
+        raise TypeError("Invalid type '%s':\n  Valid types: %s" %
+                        (var_type, ', '.join(available_types)))
+
+def create(value, var_type, **flags):
+    """Create an object of the specified type, given the specified flags and
+    string value."""
+    obj = factory(var_type)
+    objflags = {}
+    for flag in obj.flags:
+        if flag not in flags:
+            if flag not in obj.optflags:
+                raise MissingFlag(flag, var_type)
+        else:
+            objflags[flag] = flags[flag]
+
+    return obj(value, **objflags)
+
+def get_callable_args(obj):
+    """Grab all but the first argument of the specified callable, returning
+    the list, as well as a list of which of the arguments have default
+    values."""
+    if type(obj) is type:
+        obj = obj.__init__
+
+    sig = inspect.signature(obj)
+    args = list(sig.parameters.keys())
+    defaults = list(s for s in sig.parameters.keys() if sig.parameters[s].default != inspect.Parameter.empty)
+    flaglist = []
+    if args:
+        if len(args) > 1 and args[0] == 'self':
+            args = args[1:]
+        flaglist.extend(args)
+
+    optional = set()
+    if defaults:
+        optional |= set(flaglist[-len(defaults):])
+    return flaglist, optional
+
+def factory_setup(name, obj):
+    """Prepare a factory for use."""
+    args, optional = get_callable_args(obj)
+    extra_args = args[1:]
+    if extra_args:
+        obj.flags, optional = extra_args, optional
+        obj.optflags = set(optional)
+    else:
+        obj.flags = obj.optflags = ()
+
+    if not hasattr(obj, 'name'):
+        obj.name = name
+
+def register(name, factory):
+    """Register a type, given its name and a factory callable.
+
+    Determines the required and optional flags from the factory's
+    arguments."""
+    factory_setup(name, factory)
+    available_types[factory.name] = factory
+
+
+# Register all our included types
+for name in dir(types):
+    if name.startswith('_'):
+        continue
+
+    obj = getattr(types, name)
+    if not isinstance(obj, Callable):
+        continue
+
+    register(name, obj)
diff --git a/meta-xilinx-core/lib/oe/manifest.py b/meta-xilinx-core/lib/oe/manifest.py
new file mode 100644
index 00000000..61f18adc
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/manifest.py
@@ -0,0 +1,206 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+from abc import ABCMeta, abstractmethod
+import os
+import re
+import bb
+
+class Manifest(object, metaclass=ABCMeta):
+    """
+    This is an abstract class. Do not instantiate this directly.
+    """
+
+    PKG_TYPE_MUST_INSTALL = "mip"
+    PKG_TYPE_MULTILIB = "mlp"
+    PKG_TYPE_LANGUAGE = "lgp"
+    PKG_TYPE_ATTEMPT_ONLY = "aop"
+
+    MANIFEST_TYPE_IMAGE = "image"
+    MANIFEST_TYPE_SDK_HOST = "sdk_host"
+    MANIFEST_TYPE_SDK_TARGET = "sdk_target"
+
+    var_maps = {
+        MANIFEST_TYPE_IMAGE: {
+            "PACKAGE_INSTALL": PKG_TYPE_MUST_INSTALL,
+            "PACKAGE_INSTALL_ATTEMPTONLY": PKG_TYPE_ATTEMPT_ONLY,
+            "LINGUAS_INSTALL": PKG_TYPE_LANGUAGE
+        },
+        MANIFEST_TYPE_SDK_HOST: {
+            "TOOLCHAIN_HOST_TASK": PKG_TYPE_MUST_INSTALL,
+            "TOOLCHAIN_HOST_TASK_ATTEMPTONLY": PKG_TYPE_ATTEMPT_ONLY
+        },
+        MANIFEST_TYPE_SDK_TARGET: {
+            "TOOLCHAIN_TARGET_TASK": PKG_TYPE_MUST_INSTALL,
+            "TOOLCHAIN_TARGET_TASK_ATTEMPTONLY": PKG_TYPE_ATTEMPT_ONLY
+        }
+    }
+
+    INSTALL_ORDER = [
+        PKG_TYPE_LANGUAGE,
+        PKG_TYPE_MUST_INSTALL,
+        PKG_TYPE_ATTEMPT_ONLY,
+        PKG_TYPE_MULTILIB
+    ]
+
+    initial_manifest_file_header = \
+        "# This file was generated automatically and contains the packages\n" \
+        "# passed on to the package manager in order to create the rootfs.\n\n" \
+        "# Format:\n" \
+        "#  <package_type>,<package_name>\n" \
+        "# where:\n" \
+        "#   <package_type> can be:\n" \
+        "#      'mip' = must install package\n" \
+        "#      'aop' = attempt only package\n" \
+        "#      'mlp' = multilib package\n" \
+        "#      'lgp' = language package\n\n"
+
+    def __init__(self, d, manifest_dir=None, manifest_type=MANIFEST_TYPE_IMAGE):
+        self.d = d
+        self.manifest_type = manifest_type
+
+        if manifest_dir is None:
+            if manifest_type != self.MANIFEST_TYPE_IMAGE:
+                self.manifest_dir = self.d.getVar('SDK_DIR')
+            else:
+                self.manifest_dir = self.d.getVar('WORKDIR')
+        else:
+            self.manifest_dir = manifest_dir
+
+        bb.utils.mkdirhier(self.manifest_dir)
+
+        self.initial_manifest = os.path.join(self.manifest_dir, "%s_initial_manifest" % manifest_type)
+        self.final_manifest = os.path.join(self.manifest_dir, "%s_final_manifest" % manifest_type)
+        self.full_manifest = os.path.join(self.manifest_dir, "%s_full_manifest" % manifest_type)
+
+        # packages in the following vars will be split in 'must install' and
+        # 'multilib'
+        self.vars_to_split = ["PACKAGE_INSTALL",
+                              "TOOLCHAIN_HOST_TASK",
+                              "TOOLCHAIN_TARGET_TASK"]
+
+    """
+    This creates a standard initial manifest for core-image-(minimal|sato|sato-sdk).
+    This will be used for testing until the class is implemented properly!
+    """
+    def _create_dummy_initial(self):
+        image_rootfs = self.d.getVar('IMAGE_ROOTFS')
+        pkg_list = dict()
+        if image_rootfs.find("core-image-sato-sdk") > 0:
+            pkg_list[self.PKG_TYPE_MUST_INSTALL] = \
+                "packagegroup-core-x11-sato-games packagegroup-base-extended " \
+                "packagegroup-core-x11-sato packagegroup-core-x11-base " \
+                "packagegroup-core-sdk packagegroup-core-tools-debug " \
+                "packagegroup-core-boot packagegroup-core-tools-testapps " \
+                "packagegroup-core-eclipse-debug packagegroup-core-qt-demoapps " \
+                "apt packagegroup-core-tools-profile psplash " \
+                "packagegroup-core-standalone-sdk-target " \
+                "packagegroup-core-ssh-openssh dpkg kernel-dev"
+            pkg_list[self.PKG_TYPE_LANGUAGE] = \
+                "locale-base-en-us locale-base-en-gb"
+        elif image_rootfs.find("core-image-sato") > 0:
+            pkg_list[self.PKG_TYPE_MUST_INSTALL] = \
+                "packagegroup-core-ssh-dropbear packagegroup-core-x11-sato-games " \
+                "packagegroup-core-x11-base psplash apt dpkg packagegroup-base-extended " \
+                "packagegroup-core-x11-sato packagegroup-core-boot"
+            pkg_list['lgp'] = \
+                "locale-base-en-us locale-base-en-gb"
+        elif image_rootfs.find("core-image-minimal") > 0:
+            pkg_list[self.PKG_TYPE_MUST_INSTALL] = "packagegroup-core-boot"
+
+        with open(self.initial_manifest, "w+") as manifest:
+            manifest.write(self.initial_manifest_file_header)
+
+            for pkg_type in pkg_list:
+                for pkg in pkg_list[pkg_type].split():
+                    manifest.write("%s,%s\n" % (pkg_type, pkg))
+
+    """
+    This will create the initial manifest which will be used by Rootfs class to
+    generate the rootfs
+    """
+    @abstractmethod
+    def create_initial(self):
+        pass
+
+    """
+    This creates the manifest after everything has been installed.
+    """
+    @abstractmethod
+    def create_final(self):
+        pass
+
+    """
+    This creates the manifest after the package in initial manifest has been
+    dummy installed. It lists all *to be installed* packages. There is no real
+    installation, just a test.
+    """
+    @abstractmethod
+    def create_full(self, pm):
+        pass
+
+    """
+    The following function parses an initial manifest and returns a dictionary
+    object with the must install, attempt only, multilib and language packages.
+    """
+    def parse_initial_manifest(self):
+        pkgs = dict()
+
+        with open(self.initial_manifest) as manifest:
+            for line in manifest.read().split('\n'):
+                comment = re.match("^#.*", line)
+                pattern = "^(%s|%s|%s|%s),(.*)$" % \
+                          (self.PKG_TYPE_MUST_INSTALL,
+                           self.PKG_TYPE_ATTEMPT_ONLY,
+                           self.PKG_TYPE_MULTILIB,
+                           self.PKG_TYPE_LANGUAGE)
+                pkg = re.match(pattern, line)
+
+                if comment is not None:
+                    continue
+
+                if pkg is not None:
+                    pkg_type = pkg.group(1)
+                    pkg_name = pkg.group(2)
+
+                    if not pkg_type in pkgs:
+                        pkgs[pkg_type] = [pkg_name]
+                    else:
+                        pkgs[pkg_type].append(pkg_name)
+
+        return pkgs
+
+    '''
+    This following function parses a full manifest and return a list
+    object with packages.
+    '''
+    def parse_full_manifest(self):
+        installed_pkgs = list()
+        if not os.path.exists(self.full_manifest):
+            bb.note('full manifest not exist')
+            return installed_pkgs
+
+        with open(self.full_manifest, 'r') as manifest:
+            for pkg in manifest.read().split('\n'):
+                installed_pkgs.append(pkg.strip())
+
+        return installed_pkgs
+
+
+
+def create_manifest(d, final_manifest=False, manifest_dir=None,
+                    manifest_type=Manifest.MANIFEST_TYPE_IMAGE):
+    import importlib
+    manifest = importlib.import_module('oe.package_manager.' + d.getVar('IMAGE_PKGTYPE') + '.manifest').PkgManifest(d, manifest_dir, manifest_type)
+
+    if final_manifest:
+        manifest.create_final()
+    else:
+        manifest.create_initial()
+
+
+if __name__ == "__main__":
+    pass
diff --git a/meta-xilinx-core/lib/oe/npm_registry.py b/meta-xilinx-core/lib/oe/npm_registry.py
new file mode 100644
index 00000000..d97ced7c
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/npm_registry.py
@@ -0,0 +1,175 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: MIT
+#
+
+import bb
+import json
+import subprocess
+
+_ALWAYS_SAFE = frozenset('ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+                         'abcdefghijklmnopqrstuvwxyz'
+                         '0123456789'
+                         '_.-~()')
+
+MISSING_OK = object()
+
+REGISTRY = "https://registry.npmjs.org"
+
+# we can not use urllib.parse here because npm expects lowercase
+# hex-chars but urllib generates uppercase ones
+def uri_quote(s, safe = '/'):
+    res = ""
+    safe_set = set(safe)
+    for c in s:
+        if c in _ALWAYS_SAFE or c in safe_set:
+            res += c
+        else:
+            res += '%%%02x' % ord(c)
+    return res
+
+class PackageJson:
+    def __init__(self, spec):
+        self.__spec = spec
+
+    @property
+    def name(self):
+        return self.__spec['name']
+
+    @property
+    def version(self):
+        return self.__spec['version']
+
+    @property
+    def empty_manifest(self):
+        return {
+            'name': self.name,
+            'description': self.__spec.get('description', ''),
+            'versions': {},
+        }
+
+    def base_filename(self):
+        return uri_quote(self.name, safe = '@')
+
+    def as_manifest_entry(self, tarball_uri):
+        res = {}
+
+        ## NOTE: 'npm install' requires more than basic meta information;
+        ## e.g. it takes 'bin' from this manifest entry but not the actual
+        ## 'package.json'
+        for (idx,dflt) in [('name', None),
+                           ('description', ""),
+                           ('version', None),
+                           ('bin', MISSING_OK),
+                           ('man', MISSING_OK),
+                           ('scripts', MISSING_OK),
+                           ('directories', MISSING_OK),
+                           ('dependencies', MISSING_OK),
+                           ('devDependencies', MISSING_OK),
+                           ('optionalDependencies', MISSING_OK),
+                           ('license', "unknown")]:
+            if idx in self.__spec:
+                res[idx] = self.__spec[idx]
+            elif dflt == MISSING_OK:
+                pass
+            elif dflt != None:
+                res[idx] = dflt
+            else:
+                raise Exception("%s-%s: missing key %s" % (self.name,
+                                                           self.version,
+                                                           idx))
+
+        res['dist'] = {
+            'tarball': tarball_uri,
+        }
+
+        return res
+
+class ManifestImpl:
+    def __init__(self, base_fname, spec):
+        self.__base = base_fname
+        self.__spec = spec
+
+    def load(self):
+        try:
+            with open(self.filename, "r") as f:
+                res = json.load(f)
+        except IOError:
+            res = self.__spec.empty_manifest
+
+        return res
+
+    def save(self, meta):
+        with open(self.filename, "w") as f:
+            json.dump(meta, f, indent = 2)
+
+    @property
+    def filename(self):
+        return self.__base + ".meta"
+
+class Manifest:
+    def __init__(self, base_fname, spec):
+        self.__base = base_fname
+        self.__spec = spec
+        self.__lockf = None
+        self.__impl = None
+
+    def __enter__(self):
+        self.__lockf = bb.utils.lockfile(self.__base + ".lock")
+        self.__impl  = ManifestImpl(self.__base, self.__spec)
+        return self.__impl
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        bb.utils.unlockfile(self.__lockf)
+
+class NpmCache:
+    def __init__(self, cache):
+        self.__cache = cache
+
+    @property
+    def path(self):
+        return self.__cache
+
+    def run(self, type, key, fname):
+        subprocess.run(['oe-npm-cache', self.__cache, type, key, fname],
+                       check = True)
+
+class NpmRegistry:
+    def __init__(self, path, cache):
+        self.__path = path
+        self.__cache = NpmCache(cache + '/_cacache')
+        bb.utils.mkdirhier(self.__path)
+        bb.utils.mkdirhier(self.__cache.path)
+
+    @staticmethod
+    ## This function is critical and must match nodejs expectations
+    def _meta_uri(spec):
+        return REGISTRY + '/' + uri_quote(spec.name, safe = '@')
+
+    @staticmethod
+    ## Exact return value does not matter; just make it look like a
+    ## usual registry url
+    def _tarball_uri(spec):
+        return '%s/%s/-/%s-%s.tgz' % (REGISTRY,
+                                      uri_quote(spec.name, safe = '@'),
+                                      uri_quote(spec.name, safe = '@/'),
+                                      spec.version)
+
+    def add_pkg(self, tarball, pkg_json):
+        pkg_json = PackageJson(pkg_json)
+        base = os.path.join(self.__path, pkg_json.base_filename())
+
+        with Manifest(base, pkg_json) as manifest:
+            meta = manifest.load()
+            tarball_uri = self._tarball_uri(pkg_json)
+
+            meta['versions'][pkg_json.version] = pkg_json.as_manifest_entry(tarball_uri)
+
+            manifest.save(meta)
+
+            ## Cache entries are a little bit dependent on the nodejs
+            ## version; version specific cache implementation must
+            ## mitigate differences
+            self.__cache.run('meta', self._meta_uri(pkg_json), manifest.filename);
+            self.__cache.run('tgz',  tarball_uri, tarball);
diff --git a/meta-xilinx-core/lib/oe/overlayfs.py b/meta-xilinx-core/lib/oe/overlayfs.py
new file mode 100644
index 00000000..8b88900f
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/overlayfs.py
@@ -0,0 +1,54 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# This file contains common functions for overlayfs and its QA check
+
+# this function is based on https://github.com/systemd/systemd/blob/main/src/basic/unit-name.c
+def escapeSystemdUnitName(path):
+    escapeMap = {
+        '/': '-',
+        '-': "\\x2d",
+        '\\': "\\x5d"
+    }
+    return "".join([escapeMap.get(c, c) for c in path.strip('/')])
+
+def strForBash(s):
+    return s.replace('\\', '\\\\')
+
+def allOverlaysUnitName(d):
+    return d.getVar('PN') + '-overlays.service'
+
+def mountUnitName(unit):
+    return escapeSystemdUnitName(unit) + '.mount'
+
+def helperUnitName(unit):
+    return escapeSystemdUnitName(unit) + '-create-upper-dir.service'
+
+def unitFileList(d):
+    fileList = []
+    overlayMountPoints = d.getVarFlags("OVERLAYFS_MOUNT_POINT")
+
+    if not overlayMountPoints:
+        bb.fatal("A recipe uses overlayfs class but there is no OVERLAYFS_MOUNT_POINT set in your MACHINE configuration")
+
+    # check that we have required mount points set first
+    requiredMountPoints = d.getVarFlags('OVERLAYFS_WRITABLE_PATHS')
+    for mountPoint in requiredMountPoints:
+        if mountPoint not in overlayMountPoints:
+            bb.fatal("Missing required mount point for OVERLAYFS_MOUNT_POINT[%s] in your MACHINE configuration" % mountPoint)
+
+    for mountPoint in overlayMountPoints:
+        mountPointList = d.getVarFlag('OVERLAYFS_WRITABLE_PATHS', mountPoint)
+        if not mountPointList:
+            bb.debug(1, "No mount points defined for %s flag, don't add to file list", mountPoint)
+            continue
+        for path in mountPointList.split():
+            fileList.append(mountUnitName(path))
+            fileList.append(helperUnitName(path))
+
+    fileList.append(allOverlaysUnitName(d))
+
+    return fileList
+
diff --git a/meta-xilinx-core/lib/oe/package.py b/meta-xilinx-core/lib/oe/package.py
new file mode 100644
index 00000000..af0923a6
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/package.py
@@ -0,0 +1,2065 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import errno
+import fnmatch
+import itertools
+import os
+import shlex
+import re
+import glob
+import stat
+import mmap
+import subprocess
+import shutil
+
+import oe.cachedpath
+
+def runstrip(arg):
+    # Function to strip a single file, called from split_and_strip_files below
+    # A working 'file' (one which works on the target architecture)
+    #
+    # The elftype is a bit pattern (explained in is_elf below) to tell
+    # us what type of file we're processing...
+    # 4 - executable
+    # 8 - shared library
+    # 16 - kernel module
+
+    if len(arg) == 3:
+        (file, elftype, strip) = arg
+        extra_strip_sections = ''
+    else:
+        (file, elftype, strip, extra_strip_sections) = arg
+
+    newmode = None
+    if not os.access(file, os.W_OK) or os.access(file, os.R_OK):
+        origmode = os.stat(file)[stat.ST_MODE]
+        newmode = origmode | stat.S_IWRITE | stat.S_IREAD
+        os.chmod(file, newmode)
+
+    stripcmd = [strip]
+    skip_strip = False
+    # kernel module
+    if elftype & 16:
+        if is_kernel_module_signed(file):
+            bb.debug(1, "Skip strip on signed module %s" % file)
+            skip_strip = True
+        else:
+            stripcmd.extend(["--strip-debug", "--remove-section=.comment",
+                "--remove-section=.note", "--preserve-dates"])
+    # .so and shared library
+    elif ".so" in file and elftype & 8:
+        stripcmd.extend(["--remove-section=.comment", "--remove-section=.note", "--strip-unneeded"])
+    # shared or executable:
+    elif elftype & 8 or elftype & 4:
+        stripcmd.extend(["--remove-section=.comment", "--remove-section=.note"])
+        if extra_strip_sections != '':
+            for section in extra_strip_sections.split():
+                stripcmd.extend(["--remove-section=" + section])
+
+    stripcmd.append(file)
+    bb.debug(1, "runstrip: %s" % stripcmd)
+
+    if not skip_strip:
+        output = subprocess.check_output(stripcmd, stderr=subprocess.STDOUT)
+
+    if newmode:
+        os.chmod(file, origmode)
+
+# Detect .ko module by searching for "vermagic=" string
+def is_kernel_module(path):
+    with open(path) as f:
+        return mmap.mmap(f.fileno(), 0, prot=mmap.PROT_READ).find(b"vermagic=") >= 0
+
+# Detect if .ko module is signed
+def is_kernel_module_signed(path):
+    with open(path, "rb") as f:
+        f.seek(-28, 2)
+        module_tail = f.read()
+        return "Module signature appended" in "".join(chr(c) for c in bytearray(module_tail))
+
+# Return type (bits):
+# 0 - not elf
+# 1 - ELF
+# 2 - stripped
+# 4 - executable
+# 8 - shared library
+# 16 - kernel module
+def is_elf(path):
+    exec_type = 0
+    result = subprocess.check_output(["file", "-b", path], stderr=subprocess.STDOUT).decode("utf-8")
+
+    if "ELF" in result:
+        exec_type |= 1
+        if "not stripped" not in result:
+            exec_type |= 2
+        if "executable" in result:
+            exec_type |= 4
+        if "shared" in result:
+            exec_type |= 8
+        if "relocatable" in result:
+            if path.endswith(".ko") and path.find("/lib/modules/") != -1 and is_kernel_module(path):
+                exec_type |= 16
+    return (path, exec_type)
+
+def is_static_lib(path):
+    if path.endswith('.a') and not os.path.islink(path):
+        with open(path, 'rb') as fh:
+            # The magic must include the first slash to avoid
+            # matching golang static libraries
+            magic = b'!<arch>\x0a/'
+            start = fh.read(len(magic))
+            return start == magic
+    return False
+
+def strip_execs(pn, dstdir, strip_cmd, libdir, base_libdir, max_process, qa_already_stripped=False):
+    """
+    Strip executable code (like executables, shared libraries) _in_place_
+    - Based on sysroot_strip in staging.bbclass
+    :param dstdir: directory in which to strip files
+    :param strip_cmd: Strip command (usually ${STRIP})
+    :param libdir: ${libdir} - strip .so files in this directory
+    :param base_libdir: ${base_libdir} - strip .so files in this directory
+    :param max_process: number of stripping processes started in parallel
+    :param qa_already_stripped: Set to True if already-stripped' in ${INSANE_SKIP}
+    This is for proper logging and messages only.
+    """
+    import stat, errno, oe.path, oe.utils
+
+    elffiles = {}
+    inodes = {}
+    libdir = os.path.abspath(dstdir + os.sep + libdir)
+    base_libdir = os.path.abspath(dstdir + os.sep + base_libdir)
+    exec_mask = stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
+    #
+    # First lets figure out all of the files we may have to process
+    #
+    checkelf = []
+    inodecache = {}
+    for root, dirs, files in os.walk(dstdir):
+        for f in files:
+            file = os.path.join(root, f)
+
+            try:
+                ltarget = oe.path.realpath(file, dstdir, False)
+                s = os.lstat(ltarget)
+            except OSError as e:
+                (err, strerror) = e.args
+                if err != errno.ENOENT:
+                    raise
+                # Skip broken symlinks
+                continue
+            if not s:
+                continue
+            # Check its an excutable
+            if s[stat.ST_MODE] & exec_mask \
+                    or ((file.startswith(libdir) or file.startswith(base_libdir)) and ".so" in f) \
+                    or file.endswith('.ko'):
+                # If it's a symlink, and points to an ELF file, we capture the readlink target
+                if os.path.islink(file):
+                    continue
+
+                # It's a file (or hardlink), not a link
+                # ...but is it ELF, and is it already stripped?
+                checkelf.append(file)
+                inodecache[file] = s.st_ino
+    results = oe.utils.multiprocess_launch_mp(is_elf, checkelf, max_process)
+    for (file, elf_file) in results:
+                #elf_file = is_elf(file)
+                if elf_file & 1:
+                    if elf_file & 2:
+                        if qa_already_stripped:
+                            bb.note("Skipping file %s from %s for already-stripped QA test" % (file[len(dstdir):], pn))
+                        else:
+                            bb.warn("File '%s' from %s was already stripped, this will prevent future debugging!" % (file[len(dstdir):], pn))
+                        continue
+
+                    if inodecache[file] in inodes:
+                        os.unlink(file)
+                        os.link(inodes[inodecache[file]], file)
+                    else:
+                        # break hardlinks so that we do not strip the original.
+                        inodes[inodecache[file]] = file
+                        bb.utils.break_hardlinks(file)
+                        elffiles[file] = elf_file
+
+    #
+    # Now strip them (in parallel)
+    #
+    sfiles = []
+    for file in elffiles:
+        elf_file = int(elffiles[file])
+        sfiles.append((file, elf_file, strip_cmd))
+
+    oe.utils.multiprocess_launch_mp(runstrip, sfiles, max_process)
+
+
+def file_translate(file):
+    ft = file.replace("@", "@at@")
+    ft = ft.replace(" ", "@space@")
+    ft = ft.replace("\t", "@tab@")
+    ft = ft.replace("[", "@openbrace@")
+    ft = ft.replace("]", "@closebrace@")
+    ft = ft.replace("_", "@underscore@")
+    return ft
+
+def filedeprunner(arg):
+    import re, subprocess, shlex
+
+    (pkg, pkgfiles, rpmdeps, pkgdest) = arg
+    provides = {}
+    requires = {}
+
+    file_re = re.compile(r'\s+\d+\s(.*)')
+    dep_re = re.compile(r'\s+(\S)\s+(.*)')
+    r = re.compile(r'[<>=]+\s+\S*')
+
+    def process_deps(pipe, pkg, pkgdest, provides, requires):
+        file = None
+        for line in pipe.split("\n"):
+
+            m = file_re.match(line)
+            if m:
+                file = m.group(1)
+                file = file.replace(pkgdest + "/" + pkg, "")
+                file = file_translate(file)
+                continue
+
+            m = dep_re.match(line)
+            if not m or not file:
+                continue
+
+            type, dep = m.groups()
+
+            if type == 'R':
+                i = requires
+            elif type == 'P':
+                i = provides
+            else:
+               continue
+
+            if dep.startswith("python("):
+                continue
+
+            # Ignore all perl(VMS::...) and perl(Mac::...) dependencies. These
+            # are typically used conditionally from the Perl code, but are
+            # generated as unconditional dependencies.
+            if dep.startswith('perl(VMS::') or dep.startswith('perl(Mac::'):
+                continue
+
+            # Ignore perl dependencies on .pl files.
+            if dep.startswith('perl(') and dep.endswith('.pl)'):
+                continue
+
+            # Remove perl versions and perl module versions since they typically
+            # do not make sense when used as package versions.
+            if dep.startswith('perl') and r.search(dep):
+                dep = dep.split()[0]
+
+            # Put parentheses around any version specifications.
+            dep = r.sub(r'(\g<0>)',dep)
+
+            if file not in i:
+                i[file] = []
+            i[file].append(dep)
+
+        return provides, requires
+
+    output = subprocess.check_output(shlex.split(rpmdeps) + pkgfiles, stderr=subprocess.STDOUT).decode("utf-8")
+    provides, requires = process_deps(output, pkg, pkgdest, provides, requires)
+
+    return (pkg, provides, requires)
+
+
+def read_shlib_providers(d):
+    import re
+
+    shlib_provider = {}
+    shlibs_dirs = d.getVar('SHLIBSDIRS').split()
+    list_re = re.compile(r'^(.*)\.list$')
+    # Go from least to most specific since the last one found wins
+    for dir in reversed(shlibs_dirs):
+        bb.debug(2, "Reading shlib providers in %s" % (dir))
+        if not os.path.exists(dir):
+            continue
+        for file in sorted(os.listdir(dir)):
+            m = list_re.match(file)
+            if m:
+                dep_pkg = m.group(1)
+                try:
+                    fd = open(os.path.join(dir, file))
+                except IOError:
+                    # During a build unrelated shlib files may be deleted, so
+                    # handle files disappearing between the listdirs and open.
+                    continue
+                lines = fd.readlines()
+                fd.close()
+                for l in lines:
+                    s = l.strip().split(":")
+                    if s[0] not in shlib_provider:
+                        shlib_provider[s[0]] = {}
+                    shlib_provider[s[0]][s[1]] = (dep_pkg, s[2])
+    return shlib_provider
+
+# We generate a master list of directories to process, we start by
+# seeding this list with reasonable defaults, then load from
+# the fs-perms.txt files
+def fixup_perms(d):
+    import pwd, grp
+
+    cpath = oe.cachedpath.CachedPath()
+    dvar = d.getVar('PKGD')
+
+    # init using a string with the same format as a line as documented in
+    # the fs-perms.txt file
+    # <path> <mode> <uid> <gid> <walk> <fmode> <fuid> <fgid>
+    # <path> link <link target>
+    #
+    # __str__ can be used to print out an entry in the input format
+    #
+    # if fs_perms_entry.path is None:
+    #    an error occurred
+    # if fs_perms_entry.link, you can retrieve:
+    #    fs_perms_entry.path = path
+    #    fs_perms_entry.link = target of link
+    # if not fs_perms_entry.link, you can retrieve:
+    #    fs_perms_entry.path = path
+    #    fs_perms_entry.mode = expected dir mode or None
+    #    fs_perms_entry.uid = expected uid or -1
+    #    fs_perms_entry.gid = expected gid or -1
+    #    fs_perms_entry.walk = 'true' or something else
+    #    fs_perms_entry.fmode = expected file mode or None
+    #    fs_perms_entry.fuid = expected file uid or -1
+    #    fs_perms_entry_fgid = expected file gid or -1
+    class fs_perms_entry():
+        def __init__(self, line):
+            lsplit = line.split()
+            if len(lsplit) == 3 and lsplit[1].lower() == "link":
+                self._setlink(lsplit[0], lsplit[2])
+            elif len(lsplit) == 8:
+                self._setdir(lsplit[0], lsplit[1], lsplit[2], lsplit[3], lsplit[4], lsplit[5], lsplit[6], lsplit[7])
+            else:
+                msg = "Fixup Perms: invalid config line %s" % line
+                oe.qa.handle_error("perm-config", msg, d)
+                self.path = None
+                self.link = None
+
+        def _setdir(self, path, mode, uid, gid, walk, fmode, fuid, fgid):
+            self.path = os.path.normpath(path)
+            self.link = None
+            self.mode = self._procmode(mode)
+            self.uid  = self._procuid(uid)
+            self.gid  = self._procgid(gid)
+            self.walk = walk.lower()
+            self.fmode = self._procmode(fmode)
+            self.fuid = self._procuid(fuid)
+            self.fgid = self._procgid(fgid)
+
+        def _setlink(self, path, link):
+            self.path = os.path.normpath(path)
+            self.link = link
+
+        def _procmode(self, mode):
+            if not mode or (mode and mode == "-"):
+                return None
+            else:
+                return int(mode,8)
+
+        # Note uid/gid -1 has special significance in os.lchown
+        def _procuid(self, uid):
+            if uid is None or uid == "-":
+                return -1
+            elif uid.isdigit():
+                return int(uid)
+            else:
+                return pwd.getpwnam(uid).pw_uid
+
+        def _procgid(self, gid):
+            if gid is None or gid == "-":
+                return -1
+            elif gid.isdigit():
+                return int(gid)
+            else:
+                return grp.getgrnam(gid).gr_gid
+
+        # Use for debugging the entries
+        def __str__(self):
+            if self.link:
+                return "%s link %s" % (self.path, self.link)
+            else:
+                mode = "-"
+                if self.mode:
+                    mode = "0%o" % self.mode
+                fmode = "-"
+                if self.fmode:
+                    fmode = "0%o" % self.fmode
+                uid = self._mapugid(self.uid)
+                gid = self._mapugid(self.gid)
+                fuid = self._mapugid(self.fuid)
+                fgid = self._mapugid(self.fgid)
+                return "%s %s %s %s %s %s %s %s" % (self.path, mode, uid, gid, self.walk, fmode, fuid, fgid)
+
+        def _mapugid(self, id):
+            if id is None or id == -1:
+                return "-"
+            else:
+                return "%d" % id
+
+    # Fix the permission, owner and group of path
+    def fix_perms(path, mode, uid, gid, dir):
+        if mode and not os.path.islink(path):
+            #bb.note("Fixup Perms: chmod 0%o %s" % (mode, dir))
+            os.chmod(path, mode)
+        # -1 is a special value that means don't change the uid/gid
+        # if they are BOTH -1, don't bother to lchown
+        if not (uid == -1 and gid == -1):
+            #bb.note("Fixup Perms: lchown %d:%d %s" % (uid, gid, dir))
+            os.lchown(path, uid, gid)
+
+    # Return a list of configuration files based on either the default
+    # files/fs-perms.txt or the contents of FILESYSTEM_PERMS_TABLES
+    # paths are resolved via BBPATH
+    def get_fs_perms_list(d):
+        str = ""
+        bbpath = d.getVar('BBPATH')
+        fs_perms_tables = d.getVar('FILESYSTEM_PERMS_TABLES') or ""
+        for conf_file in fs_perms_tables.split():
+            confpath = bb.utils.which(bbpath, conf_file)
+            if confpath:
+                str += " %s" % bb.utils.which(bbpath, conf_file)
+            else:
+                bb.warn("cannot find %s specified in FILESYSTEM_PERMS_TABLES" % conf_file)
+        return str
+
+    fs_perms_table = {}
+    fs_link_table = {}
+
+    # By default all of the standard directories specified in
+    # bitbake.conf will get 0755 root:root.
+    target_path_vars = [    'base_prefix',
+                'prefix',
+                'exec_prefix',
+                'base_bindir',
+                'base_sbindir',
+                'base_libdir',
+                'datadir',
+                'sysconfdir',
+                'servicedir',
+                'sharedstatedir',
+                'localstatedir',
+                'infodir',
+                'mandir',
+                'docdir',
+                'bindir',
+                'sbindir',
+                'libexecdir',
+                'libdir',
+                'includedir' ]
+
+    for path in target_path_vars:
+        dir = d.getVar(path) or ""
+        if dir == "":
+            continue
+        fs_perms_table[dir] = fs_perms_entry(d.expand("%s 0755 root root false - - -" % (dir)))
+
+    # Now we actually load from the configuration files
+    for conf in get_fs_perms_list(d).split():
+        if not os.path.exists(conf):
+            continue
+        with open(conf) as f:
+            for line in f:
+                if line.startswith('#'):
+                    continue
+                lsplit = line.split()
+                if len(lsplit) == 0:
+                    continue
+                if len(lsplit) != 8 and not (len(lsplit) == 3 and lsplit[1].lower() == "link"):
+                    msg = "Fixup perms: %s invalid line: %s" % (conf, line)
+                    oe.qa.handle_error("perm-line", msg, d)
+                    continue
+                entry = fs_perms_entry(d.expand(line))
+                if entry and entry.path:
+                    if entry.link:
+                        fs_link_table[entry.path] = entry
+                        if entry.path in fs_perms_table:
+                            fs_perms_table.pop(entry.path)
+                    else:
+                        fs_perms_table[entry.path] = entry
+                        if entry.path in fs_link_table:
+                            fs_link_table.pop(entry.path)
+
+    # Debug -- list out in-memory table
+    #for dir in fs_perms_table:
+    #    bb.note("Fixup Perms: %s: %s" % (dir, str(fs_perms_table[dir])))
+    #for link in fs_link_table:
+    #    bb.note("Fixup Perms: %s: %s" % (link, str(fs_link_table[link])))
+
+    # We process links first, so we can go back and fixup directory ownership
+    # for any newly created directories
+    # Process in sorted order so /run gets created before /run/lock, etc.
+    for entry in sorted(fs_link_table.values(), key=lambda x: x.link):
+        link = entry.link
+        dir = entry.path
+        origin = dvar + dir
+        if not (cpath.exists(origin) and cpath.isdir(origin) and not cpath.islink(origin)):
+            continue
+
+        if link[0] == "/":
+            target = dvar + link
+            ptarget = link
+        else:
+            target = os.path.join(os.path.dirname(origin), link)
+            ptarget = os.path.join(os.path.dirname(dir), link)
+        if os.path.exists(target):
+            msg = "Fixup Perms: Unable to correct directory link, target already exists: %s -> %s" % (dir, ptarget)
+            oe.qa.handle_error("perm-link", msg, d)
+            continue
+
+        # Create path to move directory to, move it, and then setup the symlink
+        bb.utils.mkdirhier(os.path.dirname(target))
+        #bb.note("Fixup Perms: Rename %s -> %s" % (dir, ptarget))
+        bb.utils.rename(origin, target)
+        #bb.note("Fixup Perms: Link %s -> %s" % (dir, link))
+        os.symlink(link, origin)
+
+    for dir in fs_perms_table:
+        origin = dvar + dir
+        if not (cpath.exists(origin) and cpath.isdir(origin)):
+            continue
+
+        fix_perms(origin, fs_perms_table[dir].mode, fs_perms_table[dir].uid, fs_perms_table[dir].gid, dir)
+
+        if fs_perms_table[dir].walk == 'true':
+            for root, dirs, files in os.walk(origin):
+                for dr in dirs:
+                    each_dir = os.path.join(root, dr)
+                    fix_perms(each_dir, fs_perms_table[dir].mode, fs_perms_table[dir].uid, fs_perms_table[dir].gid, dir)
+                for f in files:
+                    each_file = os.path.join(root, f)
+                    fix_perms(each_file, fs_perms_table[dir].fmode, fs_perms_table[dir].fuid, fs_perms_table[dir].fgid, dir)
+
+# Get a list of files from file vars by searching files under current working directory
+# The list contains symlinks, directories and normal files.
+def files_from_filevars(filevars):
+    cpath = oe.cachedpath.CachedPath()
+    files = []
+    for f in filevars:
+        if os.path.isabs(f):
+            f = '.' + f
+        if not f.startswith("./"):
+            f = './' + f
+        globbed = glob.glob(f, recursive=True)
+        if globbed:
+            if [ f ] != globbed:
+                files += globbed
+                continue
+        files.append(f)
+
+    symlink_paths = []
+    for ind, f in enumerate(files):
+        # Handle directory symlinks. Truncate path to the lowest level symlink
+        parent = ''
+        for dirname in f.split('/')[:-1]:
+            parent = os.path.join(parent, dirname)
+            if dirname == '.':
+                continue
+            if cpath.islink(parent):
+                bb.warn("FILES contains file '%s' which resides under a "
+                        "directory symlink. Please fix the recipe and use the "
+                        "real path for the file." % f[1:])
+                symlink_paths.append(f)
+                files[ind] = parent
+                f = parent
+                break
+
+        if not cpath.islink(f):
+            if cpath.isdir(f):
+                newfiles = [ os.path.join(f,x) for x in os.listdir(f) ]
+                if newfiles:
+                    files += newfiles
+
+    return files, symlink_paths
+
+# Called in package_<rpm,ipk,deb>.bbclass to get the correct list of configuration files
+def get_conffiles(pkg, d):
+    pkgdest = d.getVar('PKGDEST')
+    root = os.path.join(pkgdest, pkg)
+    cwd = os.getcwd()
+    os.chdir(root)
+
+    conffiles = d.getVar('CONFFILES:%s' % pkg);
+    if conffiles == None:
+        conffiles = d.getVar('CONFFILES')
+    if conffiles == None:
+        conffiles = ""
+    conffiles = conffiles.split()
+    conf_orig_list = files_from_filevars(conffiles)[0]
+
+    # Remove links and directories from conf_orig_list to get conf_list which only contains normal files
+    conf_list = []
+    for f in conf_orig_list:
+        if os.path.isdir(f):
+            continue
+        if os.path.islink(f):
+            continue
+        if not os.path.exists(f):
+            continue
+        conf_list.append(f)
+
+    # Remove the leading './'
+    for i in range(0, len(conf_list)):
+        conf_list[i] = conf_list[i][1:]
+
+    os.chdir(cwd)
+    return sorted(conf_list)
+
+def legitimize_package_name(s):
+    """
+    Make sure package names are legitimate strings
+    """
+
+    def fixutf(m):
+        cp = m.group(1)
+        if cp:
+            return ('\\u%s' % cp).encode('latin-1').decode('unicode_escape')
+
+    # Handle unicode codepoints encoded as <U0123>, as in glibc locale files.
+    s = re.sub(r'<U([0-9A-Fa-f]{1,4})>', fixutf, s)
+
+    # Remaining package name validity fixes
+    return s.lower().replace('_', '-').replace('@', '+').replace(',', '+').replace('/', '-')
+
+def split_locales(d):
+    cpath = oe.cachedpath.CachedPath()
+    if (d.getVar('PACKAGE_NO_LOCALE') == '1'):
+        bb.debug(1, "package requested not splitting locales")
+        return
+
+    packages = (d.getVar('PACKAGES') or "").split()
+
+    dvar = d.getVar('PKGD')
+    pn = d.getVar('LOCALEBASEPN')
+
+    try:
+        locale_index = packages.index(pn + '-locale')
+        packages.pop(locale_index)
+    except ValueError:
+        locale_index = len(packages)
+
+    localepaths = []
+    locales = set()
+    for localepath in (d.getVar('LOCALE_PATHS') or "").split():
+        localedir = dvar + localepath
+        if not cpath.isdir(localedir):
+            bb.debug(1, 'No locale files in %s' % localepath)
+            continue
+
+        localepaths.append(localepath)
+        with os.scandir(localedir) as it:
+            for entry in it:
+                if entry.is_dir():
+                    locales.add(entry.name)
+
+    if len(locales) == 0:
+        bb.debug(1, "No locale files in this package")
+        return
+
+    summary = d.getVar('SUMMARY') or pn
+    description = d.getVar('DESCRIPTION') or ""
+    locale_section = d.getVar('LOCALE_SECTION')
+    mlprefix = d.getVar('MLPREFIX') or ""
+    for l in sorted(locales):
+        ln = legitimize_package_name(l)
+        pkg = pn + '-locale-' + ln
+        packages.insert(locale_index, pkg)
+        locale_index += 1
+        files = []
+        for localepath in localepaths:
+            files.append(os.path.join(localepath, l))
+        d.setVar('FILES:' + pkg, " ".join(files))
+        d.setVar('RRECOMMENDS:' + pkg, '%svirtual-locale-%s' % (mlprefix, ln))
+        d.setVar('RPROVIDES:' + pkg, '%s-locale %s%s-translation' % (pn, mlprefix, ln))
+        d.setVar('SUMMARY:' + pkg, '%s - %s translations' % (summary, l))
+        d.setVar('DESCRIPTION:' + pkg, '%s  This package contains language translation files for the %s locale.' % (description, l))
+        if locale_section:
+            d.setVar('SECTION:' + pkg, locale_section)
+
+    d.setVar('PACKAGES', ' '.join(packages))
+
+    # Disabled by RP 18/06/07
+    # Wildcards aren't supported in debian
+    # They break with ipkg since glibc-locale* will mean that
+    # glibc-localedata-translit* won't install as a dependency
+    # for some other package which breaks meta-toolchain
+    # Probably breaks since virtual-locale- isn't provided anywhere
+    #rdep = (d.getVar('RDEPENDS:%s' % pn) or "").split()
+    #rdep.append('%s-locale*' % pn)
+    #d.setVar('RDEPENDS:%s' % pn, ' '.join(rdep))
+
+def package_debug_vars(d):
+    # We default to '.debug' style
+    if d.getVar('PACKAGE_DEBUG_SPLIT_STYLE') == 'debug-file-directory':
+        # Single debug-file-directory style debug info
+        debug_vars = {
+            "append": ".debug",
+            "staticappend": "",
+            "dir": "",
+            "staticdir": "",
+            "libdir": "/usr/lib/debug",
+            "staticlibdir": "/usr/lib/debug-static",
+            "srcdir": "/usr/src/debug",
+        }
+    elif d.getVar('PACKAGE_DEBUG_SPLIT_STYLE') == 'debug-without-src':
+        # Original OE-core, a.k.a. ".debug", style debug info, but without sources in /usr/src/debug
+        debug_vars = {
+            "append": "",
+            "staticappend": "",
+            "dir": "/.debug",
+            "staticdir": "/.debug-static",
+            "libdir": "",
+            "staticlibdir": "",
+            "srcdir": "",
+        }
+    elif d.getVar('PACKAGE_DEBUG_SPLIT_STYLE') == 'debug-with-srcpkg':
+        debug_vars = {
+            "append": "",
+            "staticappend": "",
+            "dir": "/.debug",
+            "staticdir": "/.debug-static",
+            "libdir": "",
+            "staticlibdir": "",
+            "srcdir": "/usr/src/debug",
+        }
+    else:
+        # Original OE-core, a.k.a. ".debug", style debug info
+        debug_vars = {
+            "append": "",
+            "staticappend": "",
+            "dir": "/.debug",
+            "staticdir": "/.debug-static",
+            "libdir": "",
+            "staticlibdir": "",
+            "srcdir": "/usr/src/debug",
+        }
+
+    return debug_vars
+
+
+def parse_debugsources_from_dwarfsrcfiles_output(dwarfsrcfiles_output):
+    debugfiles = {}
+
+    for line in dwarfsrcfiles_output.splitlines():
+        if line.startswith("\t"):
+            debugfiles[os.path.normpath(line.split()[0])] = ""
+
+    return debugfiles.keys()
+
+def source_info(file, d, fatal=True):
+    cmd = ["dwarfsrcfiles", file]
+    try:
+        output = subprocess.check_output(cmd, universal_newlines=True, stderr=subprocess.STDOUT)
+        retval = 0
+    except subprocess.CalledProcessError as exc:
+        output = exc.output
+        retval = exc.returncode
+
+    # 255 means a specific file wasn't fully parsed to get the debug file list, which is not a fatal failure
+    if retval != 0 and retval != 255:
+        msg = "dwarfsrcfiles failed with exit code %s (cmd was %s)%s" % (retval, cmd, ":\n%s" % output if output else "")
+        if fatal:
+            bb.fatal(msg)
+        bb.note(msg)
+
+    debugsources = parse_debugsources_from_dwarfsrcfiles_output(output)
+
+    return list(debugsources)
+
+def splitdebuginfo(file, dvar, dv, d):
+    # Function to split a single file into two components, one is the stripped
+    # target system binary, the other contains any debugging information. The
+    # two files are linked to reference each other.
+    #
+    # return a mapping of files:debugsources
+
+    src = file[len(dvar):]
+    dest = dv["libdir"] + os.path.dirname(src) + dv["dir"] + "/" + os.path.basename(src) + dv["append"]
+    debugfile = dvar + dest
+    sources = []
+
+    if file.endswith(".ko") and file.find("/lib/modules/") != -1:
+        if oe.package.is_kernel_module_signed(file):
+            bb.debug(1, "Skip strip on signed module %s" % file)
+            return (file, sources)
+
+    # Split the file...
+    bb.utils.mkdirhier(os.path.dirname(debugfile))
+    #bb.note("Split %s -> %s" % (file, debugfile))
+    # Only store off the hard link reference if we successfully split!
+
+    dvar = d.getVar('PKGD')
+    objcopy = d.getVar("OBJCOPY")
+
+    newmode = None
+    if not os.access(file, os.W_OK) or os.access(file, os.R_OK):
+        origmode = os.stat(file)[stat.ST_MODE]
+        newmode = origmode | stat.S_IWRITE | stat.S_IREAD
+        os.chmod(file, newmode)
+
+    # We need to extract the debug src information here...
+    if dv["srcdir"]:
+        sources = source_info(file, d)
+
+    bb.utils.mkdirhier(os.path.dirname(debugfile))
+
+    subprocess.check_output([objcopy, '--only-keep-debug', file, debugfile], stderr=subprocess.STDOUT)
+
+    # Set the debuglink to have the view of the file path on the target
+    subprocess.check_output([objcopy, '--add-gnu-debuglink', debugfile, file], stderr=subprocess.STDOUT)
+
+    if newmode:
+        os.chmod(file, origmode)
+
+    return (file, sources)
+
+def splitstaticdebuginfo(file, dvar, dv, d):
+    # Unlike the function above, there is no way to split a static library
+    # two components.  So to get similar results we will copy the unmodified
+    # static library (containing the debug symbols) into a new directory.
+    # We will then strip (preserving symbols) the static library in the
+    # typical location.
+    #
+    # return a mapping of files:debugsources
+
+    src = file[len(dvar):]
+    dest = dv["staticlibdir"] + os.path.dirname(src) + dv["staticdir"] + "/" + os.path.basename(src) + dv["staticappend"]
+    debugfile = dvar + dest
+    sources = []
+
+    # Copy the file...
+    bb.utils.mkdirhier(os.path.dirname(debugfile))
+    #bb.note("Copy %s -> %s" % (file, debugfile))
+
+    dvar = d.getVar('PKGD')
+
+    newmode = None
+    if not os.access(file, os.W_OK) or os.access(file, os.R_OK):
+        origmode = os.stat(file)[stat.ST_MODE]
+        newmode = origmode | stat.S_IWRITE | stat.S_IREAD
+        os.chmod(file, newmode)
+
+    # We need to extract the debug src information here...
+    if dv["srcdir"]:
+        sources = source_info(file, d)
+
+    bb.utils.mkdirhier(os.path.dirname(debugfile))
+
+    # Copy the unmodified item to the debug directory
+    shutil.copy2(file, debugfile)
+
+    if newmode:
+        os.chmod(file, origmode)
+
+    return (file, sources)
+
+def inject_minidebuginfo(file, dvar, dv, d):
+    # Extract just the symbols from debuginfo into minidebuginfo,
+    # compress it with xz and inject it back into the binary in a .gnu_debugdata section.
+    # https://sourceware.org/gdb/onlinedocs/gdb/MiniDebugInfo.html
+
+    readelf = d.getVar('READELF')
+    nm = d.getVar('NM')
+    objcopy = d.getVar('OBJCOPY')
+
+    minidebuginfodir = d.expand('${WORKDIR}/minidebuginfo')
+
+    src = file[len(dvar):]
+    dest = dv["libdir"] + os.path.dirname(src) + dv["dir"] + "/" + os.path.basename(src) + dv["append"]
+    debugfile = dvar + dest
+    minidebugfile = minidebuginfodir + src + '.minidebug'
+    bb.utils.mkdirhier(os.path.dirname(minidebugfile))
+
+    # If we didn't produce debuginfo for any reason, we can't produce minidebuginfo either
+    # so skip it.
+    if not os.path.exists(debugfile):
+        bb.debug(1, 'ELF file {} has no debuginfo, skipping minidebuginfo injection'.format(file))
+        return
+
+    # minidebuginfo does not make sense to apply to ELF objects other than
+    # executables and shared libraries, skip applying the minidebuginfo
+    # generation for objects like kernel modules.
+    for line in subprocess.check_output([readelf, '-h', debugfile], universal_newlines=True).splitlines():
+        if not line.strip().startswith("Type:"):
+            continue
+        elftype = line.split(":")[1].strip()
+        if not any(elftype.startswith(i) for i in ["EXEC", "DYN"]):
+            bb.debug(1, 'ELF file {} is not executable/shared, skipping minidebuginfo injection'.format(file))
+            return
+        break
+
+    # Find non-allocated PROGBITS, NOTE, and NOBITS sections in the debuginfo.
+    # We will exclude all of these from minidebuginfo to save space.
+    remove_section_names = []
+    for line in subprocess.check_output([readelf, '-W', '-S', debugfile], universal_newlines=True).splitlines():
+        # strip the leading "  [ 1]" section index to allow splitting on space
+        if ']' not in line:
+            continue
+        fields = line[line.index(']') + 1:].split()
+        if len(fields) < 7:
+            continue
+        name = fields[0]
+        type = fields[1]
+        flags = fields[6]
+        # .debug_ sections will be removed by objcopy -S so no need to explicitly remove them
+        if name.startswith('.debug_'):
+            continue
+        if 'A' not in flags and type in ['PROGBITS', 'NOTE', 'NOBITS']:
+            remove_section_names.append(name)
+
+    # List dynamic symbols in the binary. We can exclude these from minidebuginfo
+    # because they are always present in the binary.
+    dynsyms = set()
+    for line in subprocess.check_output([nm, '-D', file, '--format=posix', '--defined-only'], universal_newlines=True).splitlines():
+        dynsyms.add(line.split()[0])
+
+    # Find all function symbols from debuginfo which aren't in the dynamic symbols table.
+    # These are the ones we want to keep in minidebuginfo.
+    keep_symbols_file = minidebugfile + '.symlist'
+    found_any_symbols = False
+    with open(keep_symbols_file, 'w') as f:
+        for line in subprocess.check_output([nm, debugfile, '--format=sysv', '--defined-only'], universal_newlines=True).splitlines():
+            fields = line.split('|')
+            if len(fields) < 7:
+                continue
+            name = fields[0].strip()
+            type = fields[3].strip()
+            if type == 'FUNC' and name not in dynsyms:
+                f.write('{}\n'.format(name))
+                found_any_symbols = True
+
+    if not found_any_symbols:
+        bb.debug(1, 'ELF file {} contains no symbols, skipping minidebuginfo injection'.format(file))
+        return
+
+    bb.utils.remove(minidebugfile)
+    bb.utils.remove(minidebugfile + '.xz')
+
+    subprocess.check_call([objcopy, '-S'] +
+                          ['--remove-section={}'.format(s) for s in remove_section_names] +
+                          ['--keep-symbols={}'.format(keep_symbols_file), debugfile, minidebugfile])
+
+    subprocess.check_call(['xz', '--keep', minidebugfile])
+
+    subprocess.check_call([objcopy, '--add-section', '.gnu_debugdata={}.xz'.format(minidebugfile), file])
+
+def copydebugsources(debugsrcdir, sources, d):
+    # The debug src information written out to sourcefile is further processed
+    # and copied to the destination here.
+
+    cpath = oe.cachedpath.CachedPath()
+
+    if debugsrcdir and sources:
+        sourcefile = d.expand("${WORKDIR}/debugsources.list")
+        bb.utils.remove(sourcefile)
+
+        # filenames are null-separated - this is an artefact of the previous use
+        # of rpm's debugedit, which was writing them out that way, and the code elsewhere
+        # is still assuming that.
+        debuglistoutput = '\0'.join(sources) + '\0'
+        with open(sourcefile, 'a') as sf:
+           sf.write(debuglistoutput)
+
+        dvar = d.getVar('PKGD')
+        strip = d.getVar("STRIP")
+        objcopy = d.getVar("OBJCOPY")
+        workdir = d.getVar("WORKDIR")
+        sdir = d.getVar("S")
+        cflags = d.expand("${CFLAGS}")
+
+        prefixmap = {}
+        for flag in cflags.split():
+            if not flag.startswith("-fdebug-prefix-map"):
+                continue
+            if "recipe-sysroot" in flag:
+                continue
+            flag = flag.split("=")
+            prefixmap[flag[1]] = flag[2]
+
+        nosuchdir = []
+        basepath = dvar
+        for p in debugsrcdir.split("/"):
+            basepath = basepath + "/" + p
+            if not cpath.exists(basepath):
+                nosuchdir.append(basepath)
+        bb.utils.mkdirhier(basepath)
+        cpath.updatecache(basepath)
+
+        for pmap in prefixmap:
+            # Ignore files from the recipe sysroots (target and native)
+            cmd =  "LC_ALL=C ; sort -z -u '%s' | egrep -v -z '((<internal>|<built-in>)$|/.*recipe-sysroot.*/)' | " % sourcefile
+            # We need to ignore files that are not actually ours
+            # we do this by only paying attention to items from this package
+            cmd += "fgrep -zw '%s' | " % prefixmap[pmap]
+            # Remove prefix in the source paths
+            cmd += "sed 's#%s/##g' | " % (prefixmap[pmap])
+            cmd += "(cd '%s' ; cpio -pd0mlL --no-preserve-owner '%s%s' 2>/dev/null)" % (pmap, dvar, prefixmap[pmap])
+
+            try:
+                subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
+            except subprocess.CalledProcessError:
+                # Can "fail" if internal headers/transient sources are attempted
+                pass
+            # cpio seems to have a bug with -lL together and symbolic links are just copied, not dereferenced.
+            # Work around this by manually finding and copying any symbolic links that made it through.
+            cmd = "find %s%s -type l -print0 -delete | sed s#%s%s/##g | (cd '%s' ; cpio -pd0mL --no-preserve-owner '%s%s')" % \
+                    (dvar, prefixmap[pmap], dvar, prefixmap[pmap], pmap, dvar, prefixmap[pmap])
+            subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
+
+        # debugsources.list may be polluted from the host if we used externalsrc,
+        # cpio uses copy-pass and may have just created a directory structure
+        # matching the one from the host, if thats the case move those files to
+        # debugsrcdir to avoid host contamination.
+        # Empty dir structure will be deleted in the next step.
+
+        # Same check as above for externalsrc
+        if workdir not in sdir:
+            if os.path.exists(dvar + debugsrcdir + sdir):
+                cmd = "mv %s%s%s/* %s%s" % (dvar, debugsrcdir, sdir, dvar,debugsrcdir)
+                subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
+
+        # The copy by cpio may have resulted in some empty directories!  Remove these
+        cmd = "find %s%s -empty -type d -delete" % (dvar, debugsrcdir)
+        subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
+
+        # Also remove debugsrcdir if its empty
+        for p in nosuchdir[::-1]:
+            if os.path.exists(p) and not os.listdir(p):
+                os.rmdir(p)
+
+
+def process_split_and_strip_files(d):
+    cpath = oe.cachedpath.CachedPath()
+
+    dvar = d.getVar('PKGD')
+    pn = d.getVar('PN')
+    hostos = d.getVar('HOST_OS')
+
+    oldcwd = os.getcwd()
+    os.chdir(dvar)
+
+    dv = package_debug_vars(d)
+
+    #
+    # First lets figure out all of the files we may have to process ... do this only once!
+    #
+    elffiles = {}
+    symlinks = {}
+    staticlibs = []
+    inodes = {}
+    libdir = os.path.abspath(dvar + os.sep + d.getVar("libdir"))
+    baselibdir = os.path.abspath(dvar + os.sep + d.getVar("base_libdir"))
+    skipfiles = (d.getVar("INHIBIT_PACKAGE_STRIP_FILES") or "").split()
+    if (d.getVar('INHIBIT_PACKAGE_STRIP') != '1' or \
+            d.getVar('INHIBIT_PACKAGE_DEBUG_SPLIT') != '1'):
+        checkelf = {}
+        checkelflinks = {}
+        checkstatic = {}
+        for root, dirs, files in cpath.walk(dvar):
+            for f in files:
+                file = os.path.join(root, f)
+
+                # Skip debug files
+                if dv["append"] and file.endswith(dv["append"]):
+                    continue
+                if dv["dir"] and dv["dir"] in os.path.dirname(file[len(dvar):]):
+                    continue
+
+                if file in skipfiles:
+                    continue
+
+                try:
+                    ltarget = cpath.realpath(file, dvar, False)
+                    s = cpath.lstat(ltarget)
+                except OSError as e:
+                    (err, strerror) = e.args
+                    if err != errno.ENOENT:
+                        raise
+                    # Skip broken symlinks
+                    continue
+                if not s:
+                    continue
+
+                if oe.package.is_static_lib(file):
+                    # Use a reference of device ID and inode number to identify files
+                    file_reference = "%d_%d" % (s.st_dev, s.st_ino)
+                    checkstatic[file] = (file, file_reference)
+                    continue
+
+                # Check its an executable
+                if (s[stat.ST_MODE] & stat.S_IXUSR) or (s[stat.ST_MODE] & stat.S_IXGRP) \
+                        or (s[stat.ST_MODE] & stat.S_IXOTH) \
+                        or ((file.startswith(libdir) or file.startswith(baselibdir)) \
+                        and (".so" in f or ".node" in f)) \
+                        or (f.startswith('vmlinux') or ".ko" in f):
+
+                    if cpath.islink(file):
+                        checkelflinks[file] = ltarget
+                        continue
+                    # Use a reference of device ID and inode number to identify files
+                    file_reference = "%d_%d" % (s.st_dev, s.st_ino)
+                    checkelf[file] = (file, file_reference)
+
+        results = oe.utils.multiprocess_launch(oe.package.is_elf, checkelflinks.values(), d)
+        results_map = {}
+        for (ltarget, elf_file) in results:
+            results_map[ltarget] = elf_file
+        for file in checkelflinks:
+            ltarget = checkelflinks[file]
+            # If it's a symlink, and points to an ELF file, we capture the readlink target
+            if results_map[ltarget]:
+                target = os.readlink(file)
+                #bb.note("Sym: %s (%d)" % (ltarget, results_map[ltarget]))
+                symlinks[file] = target
+
+        results = oe.utils.multiprocess_launch(oe.package.is_elf, checkelf.keys(), d)
+
+        # Sort results by file path. This ensures that the files are always
+        # processed in the same order, which is important to make sure builds
+        # are reproducible when dealing with hardlinks
+        results.sort(key=lambda x: x[0])
+
+        for (file, elf_file) in results:
+            # It's a file (or hardlink), not a link
+            # ...but is it ELF, and is it already stripped?
+            if elf_file & 1:
+                if elf_file & 2:
+                    if 'already-stripped' in (d.getVar('INSANE_SKIP:' + pn) or "").split():
+                        bb.note("Skipping file %s from %s for already-stripped QA test" % (file[len(dvar):], pn))
+                    else:
+                        msg = "File '%s' from %s was already stripped, this will prevent future debugging!" % (file[len(dvar):], pn)
+                        oe.qa.handle_error("already-stripped", msg, d)
+                    continue
+
+                # At this point we have an unstripped elf file. We need to:
+                #  a) Make sure any file we strip is not hardlinked to anything else outside this tree
+                #  b) Only strip any hardlinked file once (no races)
+                #  c) Track any hardlinks between files so that we can reconstruct matching debug file hardlinks
+
+                # Use a reference of device ID and inode number to identify files
+                file_reference = checkelf[file][1]
+                if file_reference in inodes:
+                    os.unlink(file)
+                    os.link(inodes[file_reference][0], file)
+                    inodes[file_reference].append(file)
+                else:
+                    inodes[file_reference] = [file]
+                    # break hardlink
+                    bb.utils.break_hardlinks(file)
+                    elffiles[file] = elf_file
+                # Modified the file so clear the cache
+                cpath.updatecache(file)
+
+        # Do the same hardlink processing as above, but for static libraries
+        results = list(checkstatic.keys())
+
+        # As above, sort the results.
+        results.sort(key=lambda x: x[0])
+
+        for file in results:
+            # Use a reference of device ID and inode number to identify files
+            file_reference = checkstatic[file][1]
+            if file_reference in inodes:
+                os.unlink(file)
+                os.link(inodes[file_reference][0], file)
+                inodes[file_reference].append(file)
+            else:
+                inodes[file_reference] = [file]
+                # break hardlink
+                bb.utils.break_hardlinks(file)
+                staticlibs.append(file)
+            # Modified the file so clear the cache
+            cpath.updatecache(file)
+
+    def strip_pkgd_prefix(f):
+        nonlocal dvar
+
+        if f.startswith(dvar):
+            return f[len(dvar):]
+
+        return f
+
+    #
+    # First lets process debug splitting
+    #
+    if (d.getVar('INHIBIT_PACKAGE_DEBUG_SPLIT') != '1'):
+        results = oe.utils.multiprocess_launch(splitdebuginfo, list(elffiles), d, extraargs=(dvar, dv, d))
+
+        if dv["srcdir"] and not hostos.startswith("mingw"):
+            if (d.getVar('PACKAGE_DEBUG_STATIC_SPLIT') == '1'):
+                results = oe.utils.multiprocess_launch(splitstaticdebuginfo, staticlibs, d, extraargs=(dvar, dv, d))
+            else:
+                for file in staticlibs:
+                    results.append( (file,source_info(file, d)) )
+
+        d.setVar("PKGDEBUGSOURCES", {strip_pkgd_prefix(f): sorted(s) for f, s in results})
+
+        sources = set()
+        for r in results:
+            sources.update(r[1])
+
+        # Hardlink our debug symbols to the other hardlink copies
+        for ref in inodes:
+            if len(inodes[ref]) == 1:
+                continue
+
+            target = inodes[ref][0][len(dvar):]
+            for file in inodes[ref][1:]:
+                src = file[len(dvar):]
+                dest = dv["libdir"] + os.path.dirname(src) + dv["dir"] + "/" + os.path.basename(target) + dv["append"]
+                fpath = dvar + dest
+                ftarget = dvar + dv["libdir"] + os.path.dirname(target) + dv["dir"] + "/" + os.path.basename(target) + dv["append"]
+                if os.access(ftarget, os.R_OK):
+                    bb.utils.mkdirhier(os.path.dirname(fpath))
+                    # Only one hardlink of separated debug info file in each directory
+                    if not os.access(fpath, os.R_OK):
+                        #bb.note("Link %s -> %s" % (fpath, ftarget))
+                        os.link(ftarget, fpath)
+                elif (d.getVar('PACKAGE_DEBUG_STATIC_SPLIT') == '1'):
+                    deststatic = dv["staticlibdir"] + os.path.dirname(src) + dv["staticdir"] + "/" + os.path.basename(file) + dv["staticappend"]
+                    fpath = dvar + deststatic
+                    ftarget = dvar + dv["staticlibdir"] + os.path.dirname(target) + dv["staticdir"] + "/" + os.path.basename(target) + dv["staticappend"]
+                    if os.access(ftarget, os.R_OK):
+                        bb.utils.mkdirhier(os.path.dirname(fpath))
+                        # Only one hardlink of separated debug info file in each directory
+                        if not os.access(fpath, os.R_OK):
+                            #bb.note("Link %s -> %s" % (fpath, ftarget))
+                            os.link(ftarget, fpath)
+                else:
+                    bb.note("Unable to find inode link target %s" % (target))
+
+        # Create symlinks for all cases we were able to split symbols
+        for file in symlinks:
+            src = file[len(dvar):]
+            dest = dv["libdir"] + os.path.dirname(src) + dv["dir"] + "/" + os.path.basename(src) + dv["append"]
+            fpath = dvar + dest
+            # Skip it if the target doesn't exist
+            try:
+                s = os.stat(fpath)
+            except OSError as e:
+                (err, strerror) = e.args
+                if err != errno.ENOENT:
+                    raise
+                continue
+
+            ltarget = symlinks[file]
+            lpath = os.path.dirname(ltarget)
+            lbase = os.path.basename(ltarget)
+            ftarget = ""
+            if lpath and lpath != ".":
+                ftarget += lpath + dv["dir"] + "/"
+            ftarget += lbase + dv["append"]
+            if lpath.startswith(".."):
+                ftarget = os.path.join("..", ftarget)
+            bb.utils.mkdirhier(os.path.dirname(fpath))
+            #bb.note("Symlink %s -> %s" % (fpath, ftarget))
+            os.symlink(ftarget, fpath)
+
+        # Process the dv["srcdir"] if requested...
+        # This copies and places the referenced sources for later debugging...
+        copydebugsources(dv["srcdir"], sources, d)
+    #
+    # End of debug splitting
+    #
+
+    #
+    # Now lets go back over things and strip them
+    #
+    if (d.getVar('INHIBIT_PACKAGE_STRIP') != '1'):
+        strip = d.getVar("STRIP")
+        sfiles = []
+        for file in elffiles:
+            elf_file = int(elffiles[file])
+            #bb.note("Strip %s" % file)
+            sfiles.append((file, elf_file, strip))
+        if (d.getVar('PACKAGE_STRIP_STATIC') == '1' or d.getVar('PACKAGE_DEBUG_STATIC_SPLIT') == '1'):
+            for f in staticlibs:
+                sfiles.append((f, 16, strip))
+
+        oe.utils.multiprocess_launch(oe.package.runstrip, sfiles, d)
+
+    # Build "minidebuginfo" and reinject it back into the stripped binaries
+    if bb.utils.contains('DISTRO_FEATURES', 'minidebuginfo', True, False, d):
+        oe.utils.multiprocess_launch(inject_minidebuginfo, list(elffiles), d,
+                                     extraargs=(dvar, dv, d))
+
+    #
+    # End of strip
+    #
+    os.chdir(oldcwd)
+
+
+def populate_packages(d):
+    cpath = oe.cachedpath.CachedPath()
+
+    workdir = d.getVar('WORKDIR')
+    outdir = d.getVar('DEPLOY_DIR')
+    dvar = d.getVar('PKGD')
+    packages = d.getVar('PACKAGES').split()
+    pn = d.getVar('PN')
+
+    bb.utils.mkdirhier(outdir)
+    os.chdir(dvar)
+
+    autodebug = not (d.getVar("NOAUTOPACKAGEDEBUG") or False)
+
+    split_source_package = (d.getVar('PACKAGE_DEBUG_SPLIT_STYLE') == 'debug-with-srcpkg')
+
+    # If debug-with-srcpkg mode is enabled then add the source package if it
+    # doesn't exist and add the source file contents to the source package.
+    if split_source_package:
+        src_package_name = ('%s-src' % d.getVar('PN'))
+        if not src_package_name in packages:
+            packages.append(src_package_name)
+        d.setVar('FILES:%s' % src_package_name, '/usr/src/debug')
+
+    # Sanity check PACKAGES for duplicates
+    # Sanity should be moved to sanity.bbclass once we have the infrastructure
+    package_dict = {}
+
+    for i, pkg in enumerate(packages):
+        if pkg in package_dict:
+            msg = "%s is listed in PACKAGES multiple times, this leads to packaging errors." % pkg
+            oe.qa.handle_error("packages-list", msg, d)
+        # Ensure the source package gets the chance to pick up the source files
+        # before the debug package by ordering it first in PACKAGES. Whether it
+        # actually picks up any source files is controlled by
+        # PACKAGE_DEBUG_SPLIT_STYLE.
+        elif pkg.endswith("-src"):
+            package_dict[pkg] = (10, i)
+        elif autodebug and pkg.endswith("-dbg"):
+            package_dict[pkg] = (30, i)
+        else:
+            package_dict[pkg] = (50, i)
+    packages = sorted(package_dict.keys(), key=package_dict.get)
+    d.setVar('PACKAGES', ' '.join(packages))
+    pkgdest = d.getVar('PKGDEST')
+
+    seen = []
+
+    # os.mkdir masks the permissions with umask so we have to unset it first
+    oldumask = os.umask(0)
+
+    debug = []
+    for root, dirs, files in cpath.walk(dvar):
+        dir = root[len(dvar):]
+        if not dir:
+            dir = os.sep
+        for f in (files + dirs):
+            path = "." + os.path.join(dir, f)
+            if "/.debug/" in path or "/.debug-static/" in path or path.endswith("/.debug"):
+                debug.append(path)
+
+    for pkg in packages:
+        root = os.path.join(pkgdest, pkg)
+        bb.utils.mkdirhier(root)
+
+        filesvar = d.getVar('FILES:%s' % pkg) or ""
+        if "//" in filesvar:
+            msg = "FILES variable for package %s contains '//' which is invalid. Attempting to fix this but you should correct the metadata.\n" % pkg
+            oe.qa.handle_error("files-invalid", msg, d)
+            filesvar.replace("//", "/")
+
+        origfiles = filesvar.split()
+        files, symlink_paths = oe.package.files_from_filevars(origfiles)
+
+        if autodebug and pkg.endswith("-dbg"):
+            files.extend(debug)
+
+        for file in files:
+            if (not cpath.islink(file)) and (not cpath.exists(file)):
+                continue
+            if file in seen:
+                continue
+            seen.append(file)
+
+            def mkdir(src, dest, p):
+                src = os.path.join(src, p)
+                dest = os.path.join(dest, p)
+                fstat = cpath.stat(src)
+                os.mkdir(dest)
+                os.chmod(dest, fstat.st_mode)
+                os.chown(dest, fstat.st_uid, fstat.st_gid)
+                if p not in seen:
+                    seen.append(p)
+                cpath.updatecache(dest)
+
+            def mkdir_recurse(src, dest, paths):
+                if cpath.exists(dest + '/' + paths):
+                    return
+                while paths.startswith("./"):
+                    paths = paths[2:]
+                p = "."
+                for c in paths.split("/"):
+                    p = os.path.join(p, c)
+                    if not cpath.exists(os.path.join(dest, p)):
+                        mkdir(src, dest, p)
+
+            if cpath.isdir(file) and not cpath.islink(file):
+                mkdir_recurse(dvar, root, file)
+                continue
+
+            mkdir_recurse(dvar, root, os.path.dirname(file))
+            fpath = os.path.join(root,file)
+            if not cpath.islink(file):
+                os.link(file, fpath)
+                continue
+            ret = bb.utils.copyfile(file, fpath)
+            if ret is False or ret == 0:
+                bb.fatal("File population failed")
+
+        # Check if symlink paths exist
+        for file in symlink_paths:
+            if not os.path.exists(os.path.join(root,file)):
+                bb.fatal("File '%s' cannot be packaged into '%s' because its "
+                         "parent directory structure does not exist. One of "
+                         "its parent directories is a symlink whose target "
+                         "directory is not included in the package." %
+                         (file, pkg))
+
+    os.umask(oldumask)
+    os.chdir(workdir)
+
+    # Handle excluding packages with incompatible licenses
+    package_list = []
+    for pkg in packages:
+        licenses = d.getVar('_exclude_incompatible-' + pkg)
+        if licenses:
+            msg = "Excluding %s from packaging as it has incompatible license(s): %s" % (pkg, licenses)
+            oe.qa.handle_error("incompatible-license", msg, d)
+        else:
+            package_list.append(pkg)
+    d.setVar('PACKAGES', ' '.join(package_list))
+
+    unshipped = []
+    for root, dirs, files in cpath.walk(dvar):
+        dir = root[len(dvar):]
+        if not dir:
+            dir = os.sep
+        for f in (files + dirs):
+            path = os.path.join(dir, f)
+            if ('.' + path) not in seen:
+                unshipped.append(path)
+
+    if unshipped != []:
+        msg = pn + ": Files/directories were installed but not shipped in any package:"
+        if "installed-vs-shipped" in (d.getVar('INSANE_SKIP:' + pn) or "").split():
+            bb.note("Package %s skipping QA tests: installed-vs-shipped" % pn)
+        else:
+            for f in unshipped:
+                msg = msg + "\n  " + f
+            msg = msg + "\nPlease set FILES such that these items are packaged. Alternatively if they are unneeded, avoid installing them or delete them within do_install.\n"
+            msg = msg + "%s: %d installed and not shipped files." % (pn, len(unshipped))
+            oe.qa.handle_error("installed-vs-shipped", msg, d)
+
+def process_fixsymlinks(pkgfiles, d):
+    cpath = oe.cachedpath.CachedPath()
+    pkgdest = d.getVar('PKGDEST')
+    packages = d.getVar("PACKAGES", False).split()
+
+    dangling_links = {}
+    pkg_files = {}
+    for pkg in packages:
+        dangling_links[pkg] = []
+        pkg_files[pkg] = []
+        inst_root = os.path.join(pkgdest, pkg)
+        for path in pkgfiles[pkg]:
+                rpath = path[len(inst_root):]
+                pkg_files[pkg].append(rpath)
+                rtarget = cpath.realpath(path, inst_root, True, assume_dir = True)
+                if not cpath.lexists(rtarget):
+                    dangling_links[pkg].append(os.path.normpath(rtarget[len(inst_root):]))
+
+    newrdepends = {}
+    for pkg in dangling_links:
+        for l in dangling_links[pkg]:
+            found = False
+            bb.debug(1, "%s contains dangling link %s" % (pkg, l))
+            for p in packages:
+                if l in pkg_files[p]:
+                        found = True
+                        bb.debug(1, "target found in %s" % p)
+                        if p == pkg:
+                            break
+                        if pkg not in newrdepends:
+                            newrdepends[pkg] = []
+                        newrdepends[pkg].append(p)
+                        break
+            if found == False:
+                bb.note("%s contains dangling symlink to %s" % (pkg, l))
+
+    for pkg in newrdepends:
+        rdepends = bb.utils.explode_dep_versions2(d.getVar('RDEPENDS:' + pkg) or "")
+        for p in newrdepends[pkg]:
+            if p not in rdepends:
+                rdepends[p] = []
+        d.setVar('RDEPENDS:' + pkg, bb.utils.join_deps(rdepends, commasep=False))
+
+def process_filedeps(pkgfiles, d):
+    """
+    Collect perfile run-time dependency metadata
+    Output:
+     FILERPROVIDESFLIST:pkg - list of all files w/ deps
+     FILERPROVIDES:filepath:pkg - per file dep
+
+      FILERDEPENDSFLIST:pkg - list of all files w/ deps
+      FILERDEPENDS:filepath:pkg - per file dep
+    """
+    if d.getVar('SKIP_FILEDEPS') == '1':
+        return
+
+    pkgdest = d.getVar('PKGDEST')
+    packages = d.getVar('PACKAGES')
+    rpmdeps = d.getVar('RPMDEPS')
+
+    def chunks(files, n):
+        return [files[i:i+n] for i in range(0, len(files), n)]
+
+    pkglist = []
+    for pkg in packages.split():
+        if d.getVar('SKIP_FILEDEPS:' + pkg) == '1':
+            continue
+        if pkg.endswith('-dbg') or pkg.endswith('-doc') or pkg.find('-locale-') != -1 or pkg.find('-localedata-') != -1 or pkg.find('-gconv-') != -1 or pkg.find('-charmap-') != -1 or pkg.startswith('kernel-module-') or pkg.endswith('-src'):
+            continue
+        for files in chunks(pkgfiles[pkg], 100):
+            pkglist.append((pkg, files, rpmdeps, pkgdest))
+
+    processed = oe.utils.multiprocess_launch(oe.package.filedeprunner, pkglist, d)
+
+    provides_files = {}
+    requires_files = {}
+
+    for result in processed:
+        (pkg, provides, requires) = result
+
+        if pkg not in provides_files:
+            provides_files[pkg] = []
+        if pkg not in requires_files:
+            requires_files[pkg] = []
+
+        for file in sorted(provides):
+            provides_files[pkg].append(file)
+            key = "FILERPROVIDES:" + file + ":" + pkg
+            d.appendVar(key, " " + " ".join(provides[file]))
+
+        for file in sorted(requires):
+            requires_files[pkg].append(file)
+            key = "FILERDEPENDS:" + file + ":" + pkg
+            d.appendVar(key, " " + " ".join(requires[file]))
+
+    for pkg in requires_files:
+        d.setVar("FILERDEPENDSFLIST:" + pkg, " ".join(sorted(requires_files[pkg])))
+    for pkg in provides_files:
+        d.setVar("FILERPROVIDESFLIST:" + pkg, " ".join(sorted(provides_files[pkg])))
+
+def process_shlibs(pkgfiles, d):
+    cpath = oe.cachedpath.CachedPath()
+
+    exclude_shlibs = d.getVar('EXCLUDE_FROM_SHLIBS', False)
+    if exclude_shlibs:
+        bb.note("not generating shlibs")
+        return
+
+    lib_re = re.compile(r"^.*\.so")
+    libdir_re = re.compile(r".*/%s$" % d.getVar('baselib'))
+
+    packages = d.getVar('PACKAGES')
+
+    shlib_pkgs = []
+    exclusion_list = d.getVar("EXCLUDE_PACKAGES_FROM_SHLIBS")
+    if exclusion_list:
+        for pkg in packages.split():
+            if pkg not in exclusion_list.split():
+                shlib_pkgs.append(pkg)
+            else:
+                bb.note("not generating shlibs for %s" % pkg)
+    else:
+        shlib_pkgs = packages.split()
+
+    hostos = d.getVar('HOST_OS')
+
+    workdir = d.getVar('WORKDIR')
+
+    ver = d.getVar('PKGV')
+    if not ver:
+        msg = "PKGV not defined"
+        oe.qa.handle_error("pkgv-undefined", msg, d)
+        return
+
+    pkgdest = d.getVar('PKGDEST')
+
+    shlibswork_dir = d.getVar('SHLIBSWORKDIR')
+
+    def linux_so(file, pkg, pkgver, d):
+        needs_ldconfig = False
+        needed = set()
+        sonames = set()
+        renames = []
+        ldir = os.path.dirname(file).replace(pkgdest + "/" + pkg, '')
+        cmd = d.getVar('OBJDUMP') + " -p " + shlex.quote(file) + " 2>/dev/null"
+        fd = os.popen(cmd)
+        lines = fd.readlines()
+        fd.close()
+        rpath = tuple()
+        for l in lines:
+            m = re.match(r"\s+RPATH\s+([^\s]*)", l)
+            if m:
+                rpaths = m.group(1).replace("$ORIGIN", ldir).split(":")
+                rpath = tuple(map(os.path.normpath, rpaths))
+        for l in lines:
+            m = re.match(r"\s+NEEDED\s+([^\s]*)", l)
+            if m:
+                dep = m.group(1)
+                if dep not in needed:
+                    needed.add((dep, file, rpath))
+            m = re.match(r"\s+SONAME\s+([^\s]*)", l)
+            if m:
+                this_soname = m.group(1)
+                prov = (this_soname, ldir, pkgver)
+                if not prov in sonames:
+                    # if library is private (only used by package) then do not build shlib for it
+                    if not private_libs or len([i for i in private_libs if fnmatch.fnmatch(this_soname, i)]) == 0:
+                        sonames.add(prov)
+                if libdir_re.match(os.path.dirname(file)):
+                    needs_ldconfig = True
+                if needs_ldconfig and snap_symlinks and (os.path.basename(file) != this_soname):
+                    renames.append((file, os.path.join(os.path.dirname(file), this_soname)))
+        return (needs_ldconfig, needed, sonames, renames)
+
+    def darwin_so(file, needed, sonames, renames, pkgver):
+        if not os.path.exists(file):
+            return
+        ldir = os.path.dirname(file).replace(pkgdest + "/" + pkg, '')
+
+        def get_combinations(base):
+            #
+            # Given a base library name, find all combinations of this split by "." and "-"
+            #
+            combos = []
+            options = base.split(".")
+            for i in range(1, len(options) + 1):
+                combos.append(".".join(options[0:i]))
+            options = base.split("-")
+            for i in range(1, len(options) + 1):
+                combos.append("-".join(options[0:i]))
+            return combos
+
+        if (file.endswith('.dylib') or file.endswith('.so')) and not pkg.endswith('-dev') and not pkg.endswith('-dbg') and not pkg.endswith('-src'):
+            # Drop suffix
+            name = os.path.basename(file).rsplit(".",1)[0]
+            # Find all combinations
+            combos = get_combinations(name)
+            for combo in combos:
+                if not combo in sonames:
+                    prov = (combo, ldir, pkgver)
+                    sonames.add(prov)
+        if file.endswith('.dylib') or file.endswith('.so'):
+            rpath = []
+            p = subprocess.Popen([d.expand("${HOST_PREFIX}otool"), '-l', file], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+            out, err = p.communicate()
+            # If returned successfully, process stdout for results
+            if p.returncode == 0:
+                for l in out.split("\n"):
+                    l = l.strip()
+                    if l.startswith('path '):
+                        rpath.append(l.split()[1])
+
+        p = subprocess.Popen([d.expand("${HOST_PREFIX}otool"), '-L', file], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+        out, err = p.communicate()
+        # If returned successfully, process stdout for results
+        if p.returncode == 0:
+            for l in out.split("\n"):
+                l = l.strip()
+                if not l or l.endswith(":"):
+                    continue
+                if "is not an object file" in l:
+                    continue
+                name = os.path.basename(l.split()[0]).rsplit(".", 1)[0]
+                if name and name not in needed[pkg]:
+                     needed[pkg].add((name, file, tuple()))
+
+    def mingw_dll(file, needed, sonames, renames, pkgver):
+        if not os.path.exists(file):
+            return
+
+        if file.endswith(".dll"):
+            # assume all dlls are shared objects provided by the package
+            sonames.add((os.path.basename(file), os.path.dirname(file).replace(pkgdest + "/" + pkg, ''), pkgver))
+
+        if (file.endswith(".dll") or file.endswith(".exe")):
+            # use objdump to search for "DLL Name: .*\.dll"
+            p = subprocess.Popen([d.expand("${OBJDUMP}"), "-p", file], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+            out, err = p.communicate()
+            # process the output, grabbing all .dll names
+            if p.returncode == 0:
+                for m in re.finditer(r"DLL Name: (.*?\.dll)$", out.decode(), re.MULTILINE | re.IGNORECASE):
+                    dllname = m.group(1)
+                    if dllname:
+                        needed[pkg].add((dllname, file, tuple()))
+
+    if d.getVar('PACKAGE_SNAP_LIB_SYMLINKS') == "1":
+        snap_symlinks = True
+    else:
+        snap_symlinks = False
+
+    needed = {}
+
+    shlib_provider = oe.package.read_shlib_providers(d)
+
+    for pkg in shlib_pkgs:
+        private_libs = d.getVar('PRIVATE_LIBS:' + pkg) or d.getVar('PRIVATE_LIBS') or ""
+        private_libs = private_libs.split()
+        needs_ldconfig = False
+        bb.debug(2, "calculating shlib provides for %s" % pkg)
+
+        pkgver = d.getVar('PKGV:' + pkg)
+        if not pkgver:
+            pkgver = d.getVar('PV_' + pkg)
+        if not pkgver:
+            pkgver = ver
+
+        needed[pkg] = set()
+        sonames = set()
+        renames = []
+        linuxlist = []
+        for file in pkgfiles[pkg]:
+                soname = None
+                if cpath.islink(file):
+                    continue
+                if hostos.startswith("darwin"):
+                    darwin_so(file, needed, sonames, renames, pkgver)
+                elif hostos.startswith("mingw"):
+                    mingw_dll(file, needed, sonames, renames, pkgver)
+                elif os.access(file, os.X_OK) or lib_re.match(file):
+                    linuxlist.append(file)
+
+        if linuxlist:
+            results = oe.utils.multiprocess_launch(linux_so, linuxlist, d, extraargs=(pkg, pkgver, d))
+            for r in results:
+                ldconfig = r[0]
+                needed[pkg] |= r[1]
+                sonames |= r[2]
+                renames.extend(r[3])
+                needs_ldconfig = needs_ldconfig or ldconfig
+
+        for (old, new) in renames:
+            bb.note("Renaming %s to %s" % (old, new))
+            bb.utils.rename(old, new)
+            pkgfiles[pkg].remove(old)
+
+        shlibs_file = os.path.join(shlibswork_dir, pkg + ".list")
+        if len(sonames):
+            with open(shlibs_file, 'w') as fd:
+                for s in sorted(sonames):
+                    if s[0] in shlib_provider and s[1] in shlib_provider[s[0]]:
+                        (old_pkg, old_pkgver) = shlib_provider[s[0]][s[1]]
+                        if old_pkg != pkg:
+                            bb.warn('%s-%s was registered as shlib provider for %s, changing it to %s-%s because it was built later' % (old_pkg, old_pkgver, s[0], pkg, pkgver))
+                    bb.debug(1, 'registering %s-%s as shlib provider for %s' % (pkg, pkgver, s[0]))
+                    fd.write(s[0] + ':' + s[1] + ':' + s[2] + '\n')
+                    if s[0] not in shlib_provider:
+                        shlib_provider[s[0]] = {}
+                    shlib_provider[s[0]][s[1]] = (pkg, pkgver)
+        if needs_ldconfig:
+            bb.debug(1, 'adding ldconfig call to postinst for %s' % pkg)
+            postinst = d.getVar('pkg_postinst:%s' % pkg)
+            if not postinst:
+                postinst = '#!/bin/sh\n'
+            postinst += d.getVar('ldconfig_postinst_fragment')
+            d.setVar('pkg_postinst:%s' % pkg, postinst)
+        bb.debug(1, 'LIBNAMES: pkg %s sonames %s' % (pkg, sonames))
+
+    assumed_libs = d.getVar('ASSUME_SHLIBS')
+    if assumed_libs:
+        libdir = d.getVar("libdir")
+        for e in assumed_libs.split():
+            l, dep_pkg = e.split(":")
+            lib_ver = None
+            dep_pkg = dep_pkg.rsplit("_", 1)
+            if len(dep_pkg) == 2:
+                lib_ver = dep_pkg[1]
+            dep_pkg = dep_pkg[0]
+            if l not in shlib_provider:
+                shlib_provider[l] = {}
+            shlib_provider[l][libdir] = (dep_pkg, lib_ver)
+
+    libsearchpath = [d.getVar('libdir'), d.getVar('base_libdir')]
+
+    for pkg in shlib_pkgs:
+        bb.debug(2, "calculating shlib requirements for %s" % pkg)
+
+        private_libs = d.getVar('PRIVATE_LIBS:' + pkg) or d.getVar('PRIVATE_LIBS') or ""
+        private_libs = private_libs.split()
+
+        deps = list()
+        for n in needed[pkg]:
+            # if n is in private libraries, don't try to search provider for it
+            # this could cause problem in case some abc.bb provides private
+            # /opt/abc/lib/libfoo.so.1 and contains /usr/bin/abc depending on system library libfoo.so.1
+            # but skipping it is still better alternative than providing own
+            # version and then adding runtime dependency for the same system library
+            if private_libs and len([i for i in private_libs if fnmatch.fnmatch(n[0], i)]) > 0:
+                bb.debug(2, '%s: Dependency %s covered by PRIVATE_LIBS' % (pkg, n[0]))
+                continue
+            if n[0] in shlib_provider.keys():
+                shlib_provider_map = shlib_provider[n[0]]
+                matches = set()
+                for p in itertools.chain(list(n[2]), sorted(shlib_provider_map.keys()), libsearchpath):
+                    if p in shlib_provider_map:
+                        matches.add(p)
+                if len(matches) > 1:
+                    matchpkgs = ', '.join([shlib_provider_map[match][0] for match in matches])
+                    bb.error("%s: Multiple shlib providers for %s: %s (used by files: %s)" % (pkg, n[0], matchpkgs, n[1]))
+                elif len(matches) == 1:
+                    (dep_pkg, ver_needed) = shlib_provider_map[matches.pop()]
+
+                    bb.debug(2, '%s: Dependency %s requires package %s (used by files: %s)' % (pkg, n[0], dep_pkg, n[1]))
+
+                    if dep_pkg == pkg:
+                        continue
+
+                    if ver_needed:
+                        dep = "%s (>= %s)" % (dep_pkg, ver_needed)
+                    else:
+                        dep = dep_pkg
+                    if not dep in deps:
+                        deps.append(dep)
+                    continue
+            bb.note("Couldn't find shared library provider for %s, used by files: %s" % (n[0], n[1]))
+
+        deps_file = os.path.join(pkgdest, pkg + ".shlibdeps")
+        if os.path.exists(deps_file):
+            os.remove(deps_file)
+        if deps:
+            with open(deps_file, 'w') as fd:
+                for dep in sorted(deps):
+                    fd.write(dep + '\n')
+
+def process_pkgconfig(pkgfiles, d):
+    packages = d.getVar('PACKAGES')
+    workdir = d.getVar('WORKDIR')
+    pkgdest = d.getVar('PKGDEST')
+
+    shlibs_dirs = d.getVar('SHLIBSDIRS').split()
+    shlibswork_dir = d.getVar('SHLIBSWORKDIR')
+
+    pc_re = re.compile(r'(.*)\.pc$')
+    var_re = re.compile(r'(.*)=(.*)')
+    field_re = re.compile(r'(.*): (.*)')
+
+    pkgconfig_provided = {}
+    pkgconfig_needed = {}
+    for pkg in packages.split():
+        pkgconfig_provided[pkg] = []
+        pkgconfig_needed[pkg] = []
+        for file in sorted(pkgfiles[pkg]):
+                m = pc_re.match(file)
+                if m:
+                    pd = bb.data.init()
+                    name = m.group(1)
+                    pkgconfig_provided[pkg].append(os.path.basename(name))
+                    if not os.access(file, os.R_OK):
+                        continue
+                    with open(file, 'r') as f:
+                        lines = f.readlines()
+                    for l in lines:
+                        m = field_re.match(l)
+                        if m:
+                            hdr = m.group(1)
+                            exp = pd.expand(m.group(2))
+                            if hdr == 'Requires':
+                                pkgconfig_needed[pkg] += exp.replace(',', ' ').split()
+                                continue
+                        m = var_re.match(l)
+                        if m:
+                            name = m.group(1)
+                            val = m.group(2)
+                            pd.setVar(name, pd.expand(val))
+
+    for pkg in packages.split():
+        pkgs_file = os.path.join(shlibswork_dir, pkg + ".pclist")
+        if pkgconfig_provided[pkg] != []:
+            with open(pkgs_file, 'w') as f:
+                for p in sorted(pkgconfig_provided[pkg]):
+                    f.write('%s\n' % p)
+
+    # Go from least to most specific since the last one found wins
+    for dir in reversed(shlibs_dirs):
+        if not os.path.exists(dir):
+            continue
+        for file in sorted(os.listdir(dir)):
+            m = re.match(r'^(.*)\.pclist$', file)
+            if m:
+                pkg = m.group(1)
+                with open(os.path.join(dir, file)) as fd:
+                    lines = fd.readlines()
+                pkgconfig_provided[pkg] = []
+                for l in lines:
+                    pkgconfig_provided[pkg].append(l.rstrip())
+
+    for pkg in packages.split():
+        deps = []
+        for n in pkgconfig_needed[pkg]:
+            found = False
+            for k in pkgconfig_provided.keys():
+                if n in pkgconfig_provided[k]:
+                    if k != pkg and not (k in deps):
+                        deps.append(k)
+                    found = True
+            if found == False:
+                bb.note("couldn't find pkgconfig module '%s' in any package" % n)
+        deps_file = os.path.join(pkgdest, pkg + ".pcdeps")
+        if len(deps):
+            with open(deps_file, 'w') as fd:
+                for dep in deps:
+                    fd.write(dep + '\n')
+
+def read_libdep_files(d):
+    pkglibdeps = {}
+    packages = d.getVar('PACKAGES').split()
+    for pkg in packages:
+        pkglibdeps[pkg] = {}
+        for extension in ".shlibdeps", ".pcdeps", ".clilibdeps":
+            depsfile = d.expand("${PKGDEST}/" + pkg + extension)
+            if os.access(depsfile, os.R_OK):
+                with open(depsfile) as fd:
+                    lines = fd.readlines()
+                for l in lines:
+                    l.rstrip()
+                    deps = bb.utils.explode_dep_versions2(l)
+                    for dep in deps:
+                        if not dep in pkglibdeps[pkg]:
+                            pkglibdeps[pkg][dep] = deps[dep]
+    return pkglibdeps
+
+def process_depchains(pkgfiles, d):
+    """
+    For a given set of prefix and postfix modifiers, make those packages
+    RRECOMMENDS on the corresponding packages for its RDEPENDS.
+
+    Example:  If package A depends upon package B, and A's .bb emits an
+    A-dev package, this would make A-dev Recommends: B-dev.
+
+    If only one of a given suffix is specified, it will take the RRECOMMENDS
+    based on the RDEPENDS of *all* other packages. If more than one of a given
+    suffix is specified, its will only use the RDEPENDS of the single parent
+    package.
+    """
+
+    packages  = d.getVar('PACKAGES')
+    postfixes = (d.getVar('DEPCHAIN_POST') or '').split()
+    prefixes  = (d.getVar('DEPCHAIN_PRE') or '').split()
+
+    def pkg_adddeprrecs(pkg, base, suffix, getname, depends, d):
+
+        #bb.note('depends for %s is %s' % (base, depends))
+        rreclist = bb.utils.explode_dep_versions2(d.getVar('RRECOMMENDS:' + pkg) or "")
+
+        for depend in sorted(depends):
+            if depend.find('-native') != -1 or depend.find('-cross') != -1 or depend.startswith('virtual/'):
+                #bb.note("Skipping %s" % depend)
+                continue
+            if depend.endswith('-dev'):
+                depend = depend[:-4]
+            if depend.endswith('-dbg'):
+                depend = depend[:-4]
+            pkgname = getname(depend, suffix)
+            #bb.note("Adding %s for %s" % (pkgname, depend))
+            if pkgname not in rreclist and pkgname != pkg:
+                rreclist[pkgname] = []
+
+        #bb.note('setting: RRECOMMENDS:%s=%s' % (pkg, ' '.join(rreclist)))
+        d.setVar('RRECOMMENDS:%s' % pkg, bb.utils.join_deps(rreclist, commasep=False))
+
+    def pkg_addrrecs(pkg, base, suffix, getname, rdepends, d):
+
+        #bb.note('rdepends for %s is %s' % (base, rdepends))
+        rreclist = bb.utils.explode_dep_versions2(d.getVar('RRECOMMENDS:' + pkg) or "")
+
+        for depend in sorted(rdepends):
+            if depend.find('virtual-locale-') != -1:
+                #bb.note("Skipping %s" % depend)
+                continue
+            if depend.endswith('-dev'):
+                depend = depend[:-4]
+            if depend.endswith('-dbg'):
+                depend = depend[:-4]
+            pkgname = getname(depend, suffix)
+            #bb.note("Adding %s for %s" % (pkgname, depend))
+            if pkgname not in rreclist and pkgname != pkg:
+                rreclist[pkgname] = []
+
+        #bb.note('setting: RRECOMMENDS:%s=%s' % (pkg, ' '.join(rreclist)))
+        d.setVar('RRECOMMENDS:%s' % pkg, bb.utils.join_deps(rreclist, commasep=False))
+
+    def add_dep(list, dep):
+        if dep not in list:
+            list.append(dep)
+
+    depends = []
+    for dep in bb.utils.explode_deps(d.getVar('DEPENDS') or ""):
+        add_dep(depends, dep)
+
+    rdepends = []
+    for pkg in packages.split():
+        for dep in bb.utils.explode_deps(d.getVar('RDEPENDS:' + pkg) or ""):
+            add_dep(rdepends, dep)
+
+    #bb.note('rdepends is %s' % rdepends)
+
+    def post_getname(name, suffix):
+        return '%s%s' % (name, suffix)
+    def pre_getname(name, suffix):
+        return '%s%s' % (suffix, name)
+
+    pkgs = {}
+    for pkg in packages.split():
+        for postfix in postfixes:
+            if pkg.endswith(postfix):
+                if not postfix in pkgs:
+                    pkgs[postfix] = {}
+                pkgs[postfix][pkg] = (pkg[:-len(postfix)], post_getname)
+
+        for prefix in prefixes:
+            if pkg.startswith(prefix):
+                if not prefix in pkgs:
+                    pkgs[prefix] = {}
+                pkgs[prefix][pkg] = (pkg[:-len(prefix)], pre_getname)
+
+    if "-dbg" in pkgs:
+        pkglibdeps = read_libdep_files(d)
+        pkglibdeplist = []
+        for pkg in pkglibdeps:
+            for k in pkglibdeps[pkg]:
+                add_dep(pkglibdeplist, k)
+        dbgdefaultdeps = ((d.getVar('DEPCHAIN_DBGDEFAULTDEPS') == '1') or (bb.data.inherits_class('packagegroup', d)))
+
+    for suffix in pkgs:
+        for pkg in pkgs[suffix]:
+            if d.getVarFlag('RRECOMMENDS:' + pkg, 'nodeprrecs'):
+                continue
+            (base, func) = pkgs[suffix][pkg]
+            if suffix == "-dev":
+                pkg_adddeprrecs(pkg, base, suffix, func, depends, d)
+            elif suffix == "-dbg":
+                if not dbgdefaultdeps:
+                    pkg_addrrecs(pkg, base, suffix, func, pkglibdeplist, d)
+                    continue
+            if len(pkgs[suffix]) == 1:
+                pkg_addrrecs(pkg, base, suffix, func, rdepends, d)
+            else:
+                rdeps = []
+                for dep in bb.utils.explode_deps(d.getVar('RDEPENDS:' + base) or ""):
+                    add_dep(rdeps, dep)
+                pkg_addrrecs(pkg, base, suffix, func, rdeps, d)
diff --git a/meta-xilinx-core/lib/oe/packagedata.py b/meta-xilinx-core/lib/oe/packagedata.py
new file mode 100644
index 00000000..2d1d6dde
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/packagedata.py
@@ -0,0 +1,366 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import codecs
+import os
+import json
+import bb.compress.zstd
+import oe.path
+
+from glob import glob
+
+def packaged(pkg, d):
+    return os.access(get_subpkgedata_fn(pkg, d) + '.packaged', os.R_OK)
+
+def read_pkgdatafile(fn):
+    pkgdata = {}
+
+    def decode(str):
+        c = codecs.getdecoder("unicode_escape")
+        return c(str)[0]
+
+    if os.access(fn, os.R_OK):
+        import re
+        with open(fn, 'r') as f:
+            lines = f.readlines()
+        r = re.compile(r"(^.+?):\s+(.*)")
+        for l in lines:
+            m = r.match(l)
+            if m:
+                pkgdata[m.group(1)] = decode(m.group(2))
+
+    return pkgdata
+
+def get_subpkgedata_fn(pkg, d):
+    return d.expand('${PKGDATA_DIR}/runtime/%s' % pkg)
+
+def has_subpkgdata(pkg, d):
+    return os.access(get_subpkgedata_fn(pkg, d), os.R_OK)
+
+def read_subpkgdata(pkg, d):
+    return read_pkgdatafile(get_subpkgedata_fn(pkg, d))
+
+def has_pkgdata(pn, d):
+    fn = d.expand('${PKGDATA_DIR}/%s' % pn)
+    return os.access(fn, os.R_OK)
+
+def read_pkgdata(pn, d):
+    fn = d.expand('${PKGDATA_DIR}/%s' % pn)
+    return read_pkgdatafile(fn)
+
+#
+# Collapse FOO:pkg variables into FOO
+#
+def read_subpkgdata_dict(pkg, d):
+    ret = {}
+    subd = read_pkgdatafile(get_subpkgedata_fn(pkg, d))
+    for var in subd:
+        newvar = var.replace(":" + pkg, "")
+        if newvar == var and var + ":" + pkg in subd:
+            continue
+        ret[newvar] = subd[var]
+    return ret
+
+def read_subpkgdata_extended(pkg, d):
+    import json
+    import bb.compress.zstd
+
+    fn = d.expand("${PKGDATA_DIR}/extended/%s.json.zstd" % pkg)
+    try:
+        num_threads = int(d.getVar("BB_NUMBER_THREADS"))
+        with bb.compress.zstd.open(fn, "rt", encoding="utf-8", num_threads=num_threads) as f:
+            return json.load(f)
+    except FileNotFoundError:
+        return None
+
+def _pkgmap(d):
+    """Return a dictionary mapping package to recipe name."""
+
+    pkgdatadir = d.getVar("PKGDATA_DIR")
+
+    pkgmap = {}
+    try:
+        files = os.listdir(pkgdatadir)
+    except OSError:
+        bb.warn("No files in %s?" % pkgdatadir)
+        files = []
+
+    for pn in [f for f in files if not os.path.isdir(os.path.join(pkgdatadir, f))]:
+        try:
+            pkgdata = read_pkgdatafile(os.path.join(pkgdatadir, pn))
+        except OSError:
+            continue
+
+        packages = pkgdata.get("PACKAGES") or ""
+        for pkg in packages.split():
+            pkgmap[pkg] = pn
+
+    return pkgmap
+
+def pkgmap(d):
+    """Return a dictionary mapping package to recipe name.
+    Cache the mapping in the metadata"""
+
+    pkgmap_data = d.getVar("__pkgmap_data", False)
+    if pkgmap_data is None:
+        pkgmap_data = _pkgmap(d)
+        d.setVar("__pkgmap_data", pkgmap_data)
+
+    return pkgmap_data
+
+def recipename(pkg, d):
+    """Return the recipe name for the given binary package name."""
+
+    return pkgmap(d).get(pkg)
+
+def foreach_runtime_provider_pkgdata(d, rdep, include_rdep=False):
+    pkgdata_dir = d.getVar("PKGDATA_DIR")
+    possibles = set()
+    try:
+        possibles |= set(os.listdir("%s/runtime-rprovides/%s/" % (pkgdata_dir, rdep)))
+    except OSError:
+        pass
+
+    if include_rdep:
+        possibles.add(rdep)
+
+    for p in sorted(list(possibles)):
+        rdep_data = read_subpkgdata(p, d)
+        yield p, rdep_data
+
+def get_package_mapping(pkg, basepkg, d, depversions=None):
+    import oe.packagedata
+
+    data = oe.packagedata.read_subpkgdata(pkg, d)
+    key = "PKG:%s" % pkg
+
+    if key in data:
+        if bb.data.inherits_class('allarch', d) and bb.data.inherits_class('packagegroup', d) and pkg != data[key]:
+            bb.error("An allarch packagegroup shouldn't depend on packages which are dynamically renamed (%s to %s)" % (pkg, data[key]))
+        # Have to avoid undoing the write_extra_pkgs(global_variants...)
+        if bb.data.inherits_class('allarch', d) and not d.getVar('MULTILIB_VARIANTS') \
+            and data[key] == basepkg:
+            return pkg
+        if depversions == []:
+            # Avoid returning a mapping if the renamed package rprovides its original name
+            rprovkey = "RPROVIDES:%s" % pkg
+            if rprovkey in data:
+                if pkg in bb.utils.explode_dep_versions2(data[rprovkey]):
+                    bb.note("%s rprovides %s, not replacing the latter" % (data[key], pkg))
+                    return pkg
+        # Do map to rewritten package name
+        return data[key]
+
+    return pkg
+
+def get_package_additional_metadata(pkg_type, d):
+    base_key = "PACKAGE_ADD_METADATA"
+    for key in ("%s_%s" % (base_key, pkg_type.upper()), base_key):
+        if d.getVar(key, False) is None:
+            continue
+        d.setVarFlag(key, "type", "list")
+        if d.getVarFlag(key, "separator") is None:
+            d.setVarFlag(key, "separator", "\\n")
+        metadata_fields = [field.strip() for field in oe.data.typed_value(key, d)]
+        return "\n".join(metadata_fields).strip()
+
+def runtime_mapping_rename(varname, pkg, d):
+    #bb.note("%s before: %s" % (varname, d.getVar(varname)))
+
+    new_depends = {}
+    deps = bb.utils.explode_dep_versions2(d.getVar(varname) or "")
+    for depend, depversions in deps.items():
+        new_depend = get_package_mapping(depend, pkg, d, depversions)
+        if depend != new_depend:
+            bb.note("package name mapping done: %s -> %s" % (depend, new_depend))
+        new_depends[new_depend] = deps[depend]
+
+    d.setVar(varname, bb.utils.join_deps(new_depends, commasep=False))
+
+    #bb.note("%s after: %s" % (varname, d.getVar(varname)))
+
+def emit_pkgdata(pkgfiles, d):
+    def process_postinst_on_target(pkg, mlprefix):
+        pkgval = d.getVar('PKG:%s' % pkg)
+        if pkgval is None:
+            pkgval = pkg
+
+        defer_fragment = """
+if [ -n "$D" ]; then
+    $INTERCEPT_DIR/postinst_intercept delay_to_first_boot %s mlprefix=%s
+    exit 0
+fi
+""" % (pkgval, mlprefix)
+
+        postinst = d.getVar('pkg_postinst:%s' % pkg)
+        postinst_ontarget = d.getVar('pkg_postinst_ontarget:%s' % pkg)
+
+        if postinst_ontarget:
+            bb.debug(1, 'adding deferred pkg_postinst_ontarget() to pkg_postinst() for %s' % pkg)
+            if not postinst:
+                postinst = '#!/bin/sh\n'
+            postinst += defer_fragment
+            postinst += postinst_ontarget
+            d.setVar('pkg_postinst:%s' % pkg, postinst)
+
+    def add_set_e_to_scriptlets(pkg):
+        for scriptlet_name in ('pkg_preinst', 'pkg_postinst', 'pkg_prerm', 'pkg_postrm'):
+            scriptlet = d.getVar('%s:%s' % (scriptlet_name, pkg))
+            if scriptlet:
+                scriptlet_split = scriptlet.split('\n')
+                if scriptlet_split[0].startswith("#!"):
+                    scriptlet = scriptlet_split[0] + "\nset -e\n" + "\n".join(scriptlet_split[1:])
+                else:
+                    scriptlet = "set -e\n" + "\n".join(scriptlet_split[0:])
+            d.setVar('%s:%s' % (scriptlet_name, pkg), scriptlet)
+
+    def write_if_exists(f, pkg, var):
+        def encode(str):
+            import codecs
+            c = codecs.getencoder("unicode_escape")
+            return c(str)[0].decode("latin1")
+
+        val = d.getVar('%s:%s' % (var, pkg))
+        if val:
+            f.write('%s:%s: %s\n' % (var, pkg, encode(val)))
+            return val
+        val = d.getVar('%s' % (var))
+        if val:
+            f.write('%s: %s\n' % (var, encode(val)))
+        return val
+
+    def write_extra_pkgs(variants, pn, packages, pkgdatadir):
+        for variant in variants:
+            with open("%s/%s-%s" % (pkgdatadir, variant, pn), 'w') as fd:
+                fd.write("PACKAGES: %s\n" % ' '.join(
+                            map(lambda pkg: '%s-%s' % (variant, pkg), packages.split())))
+
+    def write_extra_runtime_pkgs(variants, packages, pkgdatadir):
+        for variant in variants:
+            for pkg in packages.split():
+                ml_pkg = "%s-%s" % (variant, pkg)
+                subdata_file = "%s/runtime/%s" % (pkgdatadir, ml_pkg)
+                with open(subdata_file, 'w') as fd:
+                    fd.write("PKG:%s: %s" % (ml_pkg, pkg))
+
+    packages = d.getVar('PACKAGES')
+    pkgdest = d.getVar('PKGDEST')
+    pkgdatadir = d.getVar('PKGDESTWORK')
+
+    data_file = pkgdatadir + d.expand("/${PN}")
+    with open(data_file, 'w') as fd:
+        fd.write("PACKAGES: %s\n" % packages)
+
+    pkgdebugsource = d.getVar("PKGDEBUGSOURCES") or []
+
+    pn = d.getVar('PN')
+    global_variants = (d.getVar('MULTILIB_GLOBAL_VARIANTS') or "").split()
+    variants = (d.getVar('MULTILIB_VARIANTS') or "").split()
+
+    if bb.data.inherits_class('kernel', d) or bb.data.inherits_class('module-base', d):
+        write_extra_pkgs(variants, pn, packages, pkgdatadir)
+
+    if bb.data.inherits_class('allarch', d) and not variants \
+        and not bb.data.inherits_class('packagegroup', d):
+        write_extra_pkgs(global_variants, pn, packages, pkgdatadir)
+
+    workdir = d.getVar('WORKDIR')
+
+    for pkg in packages.split():
+        pkgval = d.getVar('PKG:%s' % pkg)
+        if pkgval is None:
+            pkgval = pkg
+            d.setVar('PKG:%s' % pkg, pkg)
+
+        extended_data = {
+            "files_info": {}
+        }
+
+        pkgdestpkg = os.path.join(pkgdest, pkg)
+        files = {}
+        files_extra = {}
+        total_size = 0
+        seen = set()
+        for f in pkgfiles[pkg]:
+            fpath = os.sep + os.path.relpath(f, pkgdestpkg)
+
+            fstat = os.lstat(f)
+            files[fpath] = fstat.st_size
+
+            extended_data["files_info"].setdefault(fpath, {})
+            extended_data["files_info"][fpath]['size'] = fstat.st_size
+
+            if fstat.st_ino not in seen:
+                seen.add(fstat.st_ino)
+                total_size += fstat.st_size
+
+            if fpath in pkgdebugsource:
+                extended_data["files_info"][fpath]['debugsrc'] = pkgdebugsource[fpath]
+                del pkgdebugsource[fpath]
+
+        d.setVar('FILES_INFO:' + pkg , json.dumps(files, sort_keys=True))
+
+        process_postinst_on_target(pkg, d.getVar("MLPREFIX"))
+        add_set_e_to_scriptlets(pkg)
+
+        subdata_file = pkgdatadir + "/runtime/%s" % pkg
+        with open(subdata_file, 'w') as sf:
+            for var in (d.getVar('PKGDATA_VARS') or "").split():
+                val = write_if_exists(sf, pkg, var)
+
+            write_if_exists(sf, pkg, 'FILERPROVIDESFLIST')
+            for dfile in sorted((d.getVar('FILERPROVIDESFLIST:' + pkg) or "").split()):
+                write_if_exists(sf, pkg, 'FILERPROVIDES:' + dfile)
+
+            write_if_exists(sf, pkg, 'FILERDEPENDSFLIST')
+            for dfile in sorted((d.getVar('FILERDEPENDSFLIST:' + pkg) or "").split()):
+                write_if_exists(sf, pkg, 'FILERDEPENDS:' + dfile)
+
+            sf.write('%s:%s: %d\n' % ('PKGSIZE', pkg, total_size))
+
+        subdata_extended_file = pkgdatadir + "/extended/%s.json.zstd" % pkg
+        num_threads = int(d.getVar("BB_NUMBER_THREADS"))
+        with bb.compress.zstd.open(subdata_extended_file, "wt", encoding="utf-8", num_threads=num_threads) as f:
+            json.dump(extended_data, f, sort_keys=True, separators=(",", ":"))
+
+        # Symlinks needed for rprovides lookup
+        rprov = d.getVar('RPROVIDES:%s' % pkg) or d.getVar('RPROVIDES')
+        if rprov:
+            for p in bb.utils.explode_deps(rprov):
+                subdata_sym = pkgdatadir + "/runtime-rprovides/%s/%s" % (p, pkg)
+                bb.utils.mkdirhier(os.path.dirname(subdata_sym))
+                oe.path.relsymlink(subdata_file, subdata_sym, True)
+
+        allow_empty = d.getVar('ALLOW_EMPTY:%s' % pkg)
+        if not allow_empty:
+            allow_empty = d.getVar('ALLOW_EMPTY')
+        root = "%s/%s" % (pkgdest, pkg)
+        os.chdir(root)
+        g = glob('*')
+        if g or allow_empty == "1":
+            # Symlinks needed for reverse lookups (from the final package name)
+            subdata_sym = pkgdatadir + "/runtime-reverse/%s" % pkgval
+            oe.path.relsymlink(subdata_file, subdata_sym, True)
+
+            packagedfile = pkgdatadir + '/runtime/%s.packaged' % pkg
+            open(packagedfile, 'w').close()
+
+    if bb.data.inherits_class('kernel', d) or bb.data.inherits_class('module-base', d):
+        write_extra_runtime_pkgs(variants, packages, pkgdatadir)
+
+    if bb.data.inherits_class('allarch', d) and not variants \
+        and not bb.data.inherits_class('packagegroup', d):
+        write_extra_runtime_pkgs(global_variants, packages, pkgdatadir)
+
+def mapping_rename_hook(d):
+    """
+    Rewrite variables to account for package renaming in things
+    like debian.bbclass or manual PKG variable name changes
+    """
+    pkg = d.getVar("PKG")
+    oe.packagedata.runtime_mapping_rename("RDEPENDS", pkg, d)
+    oe.packagedata.runtime_mapping_rename("RRECOMMENDS", pkg, d)
+    oe.packagedata.runtime_mapping_rename("RSUGGESTS", pkg, d)
diff --git a/meta-xilinx-core/lib/oe/packagegroup.py b/meta-xilinx-core/lib/oe/packagegroup.py
new file mode 100644
index 00000000..7b759475
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/packagegroup.py
@@ -0,0 +1,36 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import itertools
+
+def is_optional(feature, d):
+    return bool(d.getVarFlag("FEATURE_PACKAGES_%s" % feature, "optional"))
+
+def packages(features, d):
+    for feature in features:
+        packages = d.getVar("FEATURE_PACKAGES_%s" % feature)
+        for pkg in (packages or "").split():
+            yield pkg
+
+def required_packages(features, d):
+    req = [feature for feature in features if not is_optional(feature, d)]
+    return packages(req, d)
+
+def optional_packages(features, d):
+    opt = [feature for feature in features if is_optional(feature, d)]
+    return packages(opt, d)
+
+def active_packages(features, d):
+    return itertools.chain(required_packages(features, d),
+                           optional_packages(features, d))
+
+def active_recipes(features, d):
+    import oe.packagedata
+
+    for pkg in active_packages(features, d):
+        recipe = oe.packagedata.recipename(pkg, d)
+        if recipe:
+            yield recipe
diff --git a/meta-xilinx-core/lib/oe/patch.py b/meta-xilinx-core/lib/oe/patch.py
new file mode 100644
index 00000000..60a0cc82
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/patch.py
@@ -0,0 +1,1001 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import os
+import shlex
+import subprocess
+import oe.path
+import oe.types
+
+class NotFoundError(bb.BBHandledException):
+    def __init__(self, path):
+        self.path = path
+
+    def __str__(self):
+        return "Error: %s not found." % self.path
+
+class CmdError(bb.BBHandledException):
+    def __init__(self, command, exitstatus, output):
+        self.command = command
+        self.status = exitstatus
+        self.output = output
+
+    def __str__(self):
+        return "Command Error: '%s' exited with %d  Output:\n%s" % \
+                (self.command, self.status, self.output)
+
+
+def runcmd(args, dir = None):
+    if dir:
+        olddir = os.path.abspath(os.curdir)
+        if not os.path.exists(dir):
+            raise NotFoundError(dir)
+        os.chdir(dir)
+        # print("cwd: %s -> %s" % (olddir, dir))
+
+    try:
+        args = [ shlex.quote(str(arg)) for arg in args ]
+        cmd = " ".join(args)
+        # print("cmd: %s" % cmd)
+        proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
+        stdout, stderr = proc.communicate()
+        stdout = stdout.decode('utf-8')
+        stderr = stderr.decode('utf-8')
+        exitstatus = proc.returncode
+        if exitstatus != 0:
+            raise CmdError(cmd, exitstatus >> 8, "stdout: %s\nstderr: %s" % (stdout, stderr))
+        if " fuzz " in stdout and "Hunk " in stdout:
+            # Drop patch fuzz info with header and footer to log file so
+            # insane.bbclass can handle to throw error/warning
+            bb.note("--- Patch fuzz start ---\n%s\n--- Patch fuzz end ---" % format(stdout))
+
+        return stdout
+
+    finally:
+        if dir:
+            os.chdir(olddir)
+
+
+class PatchError(Exception):
+    def __init__(self, msg):
+        self.msg = msg
+
+    def __str__(self):
+        return "Patch Error: %s" % self.msg
+
+class PatchSet(object):
+    defaults = {
+        "strippath": 1
+    }
+
+    def __init__(self, dir, d):
+        self.dir = dir
+        self.d = d
+        self.patches = []
+        self._current = None
+
+    def current(self):
+        return self._current
+
+    def Clean(self):
+        """
+        Clean out the patch set.  Generally includes unapplying all
+        patches and wiping out all associated metadata.
+        """
+        raise NotImplementedError()
+
+    def Import(self, patch, force):
+        if not patch.get("file"):
+            if not patch.get("remote"):
+                raise PatchError("Patch file must be specified in patch import.")
+            else:
+                patch["file"] = bb.fetch2.localpath(patch["remote"], self.d)
+
+        for param in PatchSet.defaults:
+            if not patch.get(param):
+                patch[param] = PatchSet.defaults[param]
+
+        if patch.get("remote"):
+            patch["file"] = self.d.expand(bb.fetch2.localpath(patch["remote"], self.d))
+
+        patch["filemd5"] = bb.utils.md5_file(patch["file"])
+
+    def Push(self, force):
+        raise NotImplementedError()
+
+    def Pop(self, force):
+        raise NotImplementedError()
+
+    def Refresh(self, remote = None, all = None):
+        raise NotImplementedError()
+
+    @staticmethod
+    def getPatchedFiles(patchfile, striplevel, srcdir=None):
+        """
+        Read a patch file and determine which files it will modify.
+        Params:
+            patchfile: the patch file to read
+            striplevel: the strip level at which the patch is going to be applied
+            srcdir: optional path to join onto the patched file paths
+        Returns:
+            A list of tuples of file path and change mode ('A' for add,
+            'D' for delete or 'M' for modify)
+        """
+
+        def patchedpath(patchline):
+            filepth = patchline.split()[1]
+            if filepth.endswith('/dev/null'):
+                return '/dev/null'
+            filesplit = filepth.split(os.sep)
+            if striplevel > len(filesplit):
+                bb.error('Patch %s has invalid strip level %d' % (patchfile, striplevel))
+                return None
+            return os.sep.join(filesplit[striplevel:])
+
+        for encoding in ['utf-8', 'latin-1']:
+            try:
+                copiedmode = False
+                filelist = []
+                with open(patchfile) as f:
+                    for line in f:
+                        if line.startswith('--- '):
+                            patchpth = patchedpath(line)
+                            if not patchpth:
+                                break
+                            if copiedmode:
+                                addedfile = patchpth
+                            else:
+                                removedfile = patchpth
+                        elif line.startswith('+++ '):
+                            addedfile = patchedpath(line)
+                            if not addedfile:
+                                break
+                        elif line.startswith('*** '):
+                            copiedmode = True
+                            removedfile = patchedpath(line)
+                            if not removedfile:
+                                break
+                        else:
+                            removedfile = None
+                            addedfile = None
+
+                        if addedfile and removedfile:
+                            if removedfile == '/dev/null':
+                                mode = 'A'
+                            elif addedfile == '/dev/null':
+                                mode = 'D'
+                            else:
+                                mode = 'M'
+                            if srcdir:
+                                fullpath = os.path.abspath(os.path.join(srcdir, addedfile))
+                            else:
+                                fullpath = addedfile
+                            filelist.append((fullpath, mode))
+            except UnicodeDecodeError:
+                continue
+            break
+        else:
+            raise PatchError('Unable to decode %s' % patchfile)
+
+        return filelist
+
+
+class PatchTree(PatchSet):
+    def __init__(self, dir, d):
+        PatchSet.__init__(self, dir, d)
+        self.patchdir = os.path.join(self.dir, 'patches')
+        self.seriespath = os.path.join(self.dir, 'patches', 'series')
+        bb.utils.mkdirhier(self.patchdir)
+
+    def _appendPatchFile(self, patch, strippath):
+        with open(self.seriespath, 'a') as f:
+            f.write(os.path.basename(patch) + "," + strippath + "\n")
+        shellcmd = ["cat", patch, ">" , self.patchdir + "/" + os.path.basename(patch)]
+        runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+
+    def _removePatch(self, p):
+        patch = {}
+        patch['file'] = p.split(",")[0]
+        patch['strippath'] = p.split(",")[1]
+        self._applypatch(patch, False, True)
+
+    def _removePatchFile(self, all = False):
+        if not os.path.exists(self.seriespath):
+            return
+        with open(self.seriespath, 'r+') as f:
+            patches = f.readlines()
+        if all:
+            for p in reversed(patches):
+                self._removePatch(os.path.join(self.patchdir, p.strip()))
+            patches = []
+        else:
+            self._removePatch(os.path.join(self.patchdir, patches[-1].strip()))
+            patches.pop()
+        with open(self.seriespath, 'w') as f:
+            for p in patches:
+                f.write(p)
+
+    def Import(self, patch, force = None):
+        """"""
+        PatchSet.Import(self, patch, force)
+
+        if self._current is not None:
+            i = self._current + 1
+        else:
+            i = 0
+        self.patches.insert(i, patch)
+
+    def _applypatch(self, patch, force = False, reverse = False, run = True):
+        shellcmd = ["cat", patch['file'], "|", "patch", "--no-backup-if-mismatch", "-p", patch['strippath']]
+        if reverse:
+            shellcmd.append('-R')
+
+        if not run:
+            return "sh" + "-c" + " ".join(shellcmd)
+
+        if not force:
+            shellcmd.append('--dry-run')
+
+        try:
+            output = runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+
+            if force:
+                return
+
+            shellcmd.pop(len(shellcmd) - 1)
+            output = runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+        except CmdError as err:
+            raise bb.BBHandledException("Applying '%s' failed:\n%s" %
+                                        (os.path.basename(patch['file']), err.output))
+
+        if not reverse:
+            self._appendPatchFile(patch['file'], patch['strippath'])
+
+        return output
+
+    def Push(self, force = False, all = False, run = True):
+        bb.note("self._current is %s" % self._current)
+        bb.note("patches is %s" % self.patches)
+        if all:
+            for i in self.patches:
+                bb.note("applying patch %s" % i)
+                self._applypatch(i, force)
+                self._current = i
+        else:
+            if self._current is not None:
+                next = self._current + 1
+            else:
+                next = 0
+
+            bb.note("applying patch %s" % self.patches[next])
+            ret = self._applypatch(self.patches[next], force)
+
+            self._current = next
+            return ret
+
+    def Pop(self, force = None, all = None):
+        if all:
+            self._removePatchFile(True)
+            self._current = None
+        else:
+            self._removePatchFile(False)
+
+        if self._current == 0:
+            self._current = None
+
+        if self._current is not None:
+            self._current = self._current - 1
+
+    def Clean(self):
+        """"""
+        self.Pop(all=True)
+
+class GitApplyTree(PatchTree):
+    notes_ref = "refs/notes/devtool"
+    original_patch = 'original patch'
+    ignore_commit = 'ignore'
+
+    def __init__(self, dir, d):
+        PatchTree.__init__(self, dir, d)
+        self.commituser = d.getVar('PATCH_GIT_USER_NAME')
+        self.commitemail = d.getVar('PATCH_GIT_USER_EMAIL')
+        if not self._isInitialized(d):
+            self._initRepo()
+
+    def _isInitialized(self, d):
+        cmd = "git rev-parse --show-toplevel"
+        try:
+            output = runcmd(cmd.split(), self.dir).strip()
+        except CmdError as err:
+            ## runcmd returned non-zero which most likely means 128
+            ## Not a git directory
+            return False
+        ## Make sure repo is in builddir to not break top-level git repos, or under workdir
+        return os.path.samefile(output, self.dir) or oe.path.is_path_parent(d.getVar('WORKDIR'), output)
+
+    def _initRepo(self):
+        runcmd("git init".split(), self.dir)
+        runcmd("git add .".split(), self.dir)
+        runcmd("git commit -a --allow-empty -m bitbake_patching_started".split(), self.dir)
+
+    @staticmethod
+    def extractPatchHeader(patchfile):
+        """
+        Extract just the header lines from the top of a patch file
+        """
+        for encoding in ['utf-8', 'latin-1']:
+            lines = []
+            try:
+                with open(patchfile, 'r', encoding=encoding) as f:
+                    for line in f:
+                        if line.startswith('Index: ') or line.startswith('diff -') or line.startswith('---'):
+                            break
+                        lines.append(line)
+            except UnicodeDecodeError:
+                continue
+            break
+        else:
+            raise PatchError('Unable to find a character encoding to decode %s' % patchfile)
+        return lines
+
+    @staticmethod
+    def decodeAuthor(line):
+        from email.header import decode_header
+        authorval = line.split(':', 1)[1].strip().replace('"', '')
+        result =  decode_header(authorval)[0][0]
+        if hasattr(result, 'decode'):
+            result = result.decode('utf-8')
+        return result
+
+    @staticmethod
+    def interpretPatchHeader(headerlines):
+        import re
+        author_re = re.compile(r'[\S ]+ <\S+@\S+\.\S+>')
+        from_commit_re = re.compile(r'^From [a-z0-9]{40} .*')
+        outlines = []
+        author = None
+        date = None
+        subject = None
+        for line in headerlines:
+            if line.startswith('Subject: '):
+                subject = line.split(':', 1)[1]
+                # Remove any [PATCH][oe-core] etc.
+                subject = re.sub(r'\[.+?\]\s*', '', subject)
+                continue
+            elif line.startswith('From: ') or line.startswith('Author: '):
+                authorval = GitApplyTree.decodeAuthor(line)
+                # git is fussy about author formatting i.e. it must be Name <email@domain>
+                if author_re.match(authorval):
+                    author = authorval
+                    continue
+            elif line.startswith('Date: '):
+                if date is None:
+                    dateval = line.split(':', 1)[1].strip()
+                    # Very crude check for date format, since git will blow up if it's not in the right
+                    # format. Without e.g. a python-dateutils dependency we can't do a whole lot more
+                    if len(dateval) > 12:
+                        date = dateval
+                continue
+            elif not author and line.lower().startswith('signed-off-by: '):
+                authorval = GitApplyTree.decodeAuthor(line)
+                # git is fussy about author formatting i.e. it must be Name <email@domain>
+                if author_re.match(authorval):
+                    author = authorval
+            elif from_commit_re.match(line):
+                # We don't want the From <commit> line - if it's present it will break rebasing
+                continue
+            outlines.append(line)
+
+        if not subject:
+            firstline = None
+            for line in headerlines:
+                line = line.strip()
+                if firstline:
+                    if line:
+                        # Second line is not blank, the first line probably isn't usable
+                        firstline = None
+                    break
+                elif line:
+                    firstline = line
+            if firstline and not firstline.startswith(('#', 'Index:', 'Upstream-Status:')) and len(firstline) < 100:
+                subject = firstline
+
+        return outlines, author, date, subject
+
+    @staticmethod
+    def gitCommandUserOptions(cmd, commituser=None, commitemail=None, d=None):
+        if d:
+            commituser = d.getVar('PATCH_GIT_USER_NAME')
+            commitemail = d.getVar('PATCH_GIT_USER_EMAIL')
+        if commituser:
+            cmd += ['-c', 'user.name="%s"' % commituser]
+        if commitemail:
+            cmd += ['-c', 'user.email="%s"' % commitemail]
+
+    @staticmethod
+    def prepareCommit(patchfile, commituser=None, commitemail=None):
+        """
+        Prepare a git commit command line based on the header from a patch file
+        (typically this is useful for patches that cannot be applied with "git am" due to formatting)
+        """
+        import tempfile
+        # Process patch header and extract useful information
+        lines = GitApplyTree.extractPatchHeader(patchfile)
+        outlines, author, date, subject = GitApplyTree.interpretPatchHeader(lines)
+        if not author or not subject or not date:
+            try:
+                shellcmd = ["git", "log", "--format=email", "--follow", "--diff-filter=A", "--", patchfile]
+                out = runcmd(["sh", "-c", " ".join(shellcmd)], os.path.dirname(patchfile))
+            except CmdError:
+                out = None
+            if out:
+                _, newauthor, newdate, newsubject = GitApplyTree.interpretPatchHeader(out.splitlines())
+                if not author:
+                    # If we're setting the author then the date should be set as well
+                    author = newauthor
+                    date = newdate
+                elif not date:
+                    # If we don't do this we'll get the current date, at least this will be closer
+                    date = newdate
+                if not subject:
+                    subject = newsubject
+        if subject and not (outlines and outlines[0].strip() == subject):
+            outlines.insert(0, '%s\n\n' % subject.strip())
+
+        # Write out commit message to a file
+        with tempfile.NamedTemporaryFile('w', delete=False) as tf:
+            tmpfile = tf.name
+            for line in outlines:
+                tf.write(line)
+        # Prepare git command
+        cmd = ["git"]
+        GitApplyTree.gitCommandUserOptions(cmd, commituser, commitemail)
+        cmd += ["commit", "-F", tmpfile, "--no-verify"]
+        # git doesn't like plain email addresses as authors
+        if author and '<' in author:
+            cmd.append('--author="%s"' % author)
+        if date:
+            cmd.append('--date="%s"' % date)
+        return (tmpfile, cmd)
+
+    @staticmethod
+    def addNote(repo, ref, key, value=None):
+        note = key + (": %s" % value if value else "")
+        notes_ref = GitApplyTree.notes_ref
+        runcmd(["git", "config", "notes.rewriteMode", "ignore"], repo)
+        runcmd(["git", "config", "notes.displayRef", notes_ref, notes_ref], repo)
+        runcmd(["git", "config", "notes.rewriteRef", notes_ref, notes_ref], repo)
+        runcmd(["git", "notes", "--ref", notes_ref, "append", "-m", note, ref], repo)
+
+    @staticmethod
+    def removeNote(repo, ref, key):
+        notes = GitApplyTree.getNotes(repo, ref)
+        notes = {k: v for k, v in notes.items() if k != key and not k.startswith(key + ":")}
+        runcmd(["git", "notes", "--ref", GitApplyTree.notes_ref, "remove", "--ignore-missing", ref], repo)
+        for note, value in notes.items():
+            GitApplyTree.addNote(repo, ref, note, value)
+
+    @staticmethod
+    def getNotes(repo, ref):
+        import re
+
+        note = None
+        try:
+            note = runcmd(["git", "notes", "--ref", GitApplyTree.notes_ref, "show", ref], repo)
+            prefix = ""
+        except CmdError:
+            note = runcmd(['git', 'show', '-s', '--format=%B', ref], repo)
+            prefix = "%% "
+
+        note_re = re.compile(r'^%s(.*?)(?::\s*(.*))?$' % prefix)
+        notes = dict()
+        for line in note.splitlines():
+            m = note_re.match(line)
+            if m:
+                notes[m.group(1)] = m.group(2)
+
+        return notes
+
+    @staticmethod
+    def commitIgnored(subject, dir=None, files=None, d=None):
+        if files:
+            runcmd(['git', 'add'] + files, dir)
+        cmd = ["git"]
+        GitApplyTree.gitCommandUserOptions(cmd, d=d)
+        cmd += ["commit", "-m", subject, "--no-verify"]
+        runcmd(cmd, dir)
+        GitApplyTree.addNote(dir, "HEAD", GitApplyTree.ignore_commit)
+
+    @staticmethod
+    def extractPatches(tree, startcommits, outdir, paths=None):
+        import tempfile
+        import shutil
+        tempdir = tempfile.mkdtemp(prefix='oepatch')
+        try:
+            for name, rev in startcommits.items():
+                shellcmd = ["git", "format-patch", "--no-signature", "--no-numbered", rev, "-o", tempdir]
+                if paths:
+                    shellcmd.append('--')
+                    shellcmd.extend(paths)
+                out = runcmd(["sh", "-c", " ".join(shellcmd)], os.path.join(tree, name))
+                if out:
+                    for srcfile in out.split():
+                        # This loop, which is used to remove any line that
+                        # starts with "%% original patch", is kept for backwards
+                        # compatibility. If/when that compatibility is dropped,
+                        # it can be replaced with code to just read the first
+                        # line of the patch file to get the SHA-1, and the code
+                        # below that writes the modified patch file can be
+                        # replaced with a simple file move.
+                        for encoding in ['utf-8', 'latin-1']:
+                            patchlines = []
+                            try:
+                                with open(srcfile, 'r', encoding=encoding, newline='') as f:
+                                    for line in f:
+                                        if line.startswith("%% " + GitApplyTree.original_patch):
+                                            continue
+                                        patchlines.append(line)
+                            except UnicodeDecodeError:
+                                continue
+                            break
+                        else:
+                            raise PatchError('Unable to find a character encoding to decode %s' % srcfile)
+
+                        sha1 = patchlines[0].split()[1]
+                        notes = GitApplyTree.getNotes(os.path.join(tree, name), sha1)
+                        if GitApplyTree.ignore_commit in notes:
+                            continue
+                        outfile = notes.get(GitApplyTree.original_patch, os.path.basename(srcfile))
+
+                        bb.utils.mkdirhier(os.path.join(outdir, name))
+                        with open(os.path.join(outdir, name, outfile), 'w') as of:
+                            for line in patchlines:
+                                of.write(line)
+        finally:
+            shutil.rmtree(tempdir)
+
+    def _need_dirty_check(self):
+        fetch = bb.fetch2.Fetch([], self.d)
+        check_dirtyness = False
+        for url in fetch.urls:
+            url_data = fetch.ud[url]
+            parm = url_data.parm
+            # a git url with subpath param will surely be dirty
+            # since the git tree from which we clone will be emptied
+            # from all files that are not in the subpath
+            if url_data.type == 'git' and parm.get('subpath'):
+                check_dirtyness = True
+        return check_dirtyness
+
+    def _commitpatch(self, patch, patchfilevar):
+        output = ""
+        # Add all files
+        shellcmd = ["git", "add", "-f", "-A", "."]
+        output += runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+        # Exclude the patches directory
+        shellcmd = ["git", "reset", "HEAD", self.patchdir]
+        output += runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+        # Commit the result
+        (tmpfile, shellcmd) = self.prepareCommit(patch['file'], self.commituser, self.commitemail)
+        try:
+            shellcmd.insert(0, patchfilevar)
+            output += runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+        finally:
+            os.remove(tmpfile)
+        return output
+
+    def _applypatch(self, patch, force = False, reverse = False, run = True):
+        import shutil
+
+        def _applypatchhelper(shellcmd, patch, force = False, reverse = False, run = True):
+            if reverse:
+                shellcmd.append('-R')
+
+            shellcmd.append(patch['file'])
+
+            if not run:
+                return "sh" + "-c" + " ".join(shellcmd)
+
+            return runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+
+        reporoot = (runcmd("git rev-parse --show-toplevel".split(), self.dir) or '').strip()
+        if not reporoot:
+            raise Exception("Cannot get repository root for directory %s" % self.dir)
+
+        patch_applied = True
+        try:
+            patchfilevar = 'PATCHFILE="%s"' % os.path.basename(patch['file'])
+            if self._need_dirty_check():
+                # Check dirtyness of the tree
+                try:
+                    output = runcmd(["git", "--work-tree=%s" % reporoot, "status", "--short"])
+                except CmdError:
+                    pass
+                else:
+                    if output:
+                        # The tree is dirty, no need to try to apply patches with git anymore
+                        # since they fail, fallback directly to patch
+                        output = PatchTree._applypatch(self, patch, force, reverse, run)
+                        output += self._commitpatch(patch, patchfilevar)
+                        return output
+            try:
+                shellcmd = [patchfilevar, "git", "--work-tree=%s" % reporoot]
+                self.gitCommandUserOptions(shellcmd, self.commituser, self.commitemail)
+                shellcmd += ["am", "-3", "--keep-cr", "--no-scissors", "-p%s" % patch['strippath']]
+                return _applypatchhelper(shellcmd, patch, force, reverse, run)
+            except CmdError:
+                # Need to abort the git am, or we'll still be within it at the end
+                try:
+                    shellcmd = ["git", "--work-tree=%s" % reporoot, "am", "--abort"]
+                    runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+                except CmdError:
+                    pass
+                # git am won't always clean up after itself, sadly, so...
+                shellcmd = ["git", "--work-tree=%s" % reporoot, "reset", "--hard", "HEAD"]
+                runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+                # Also need to take care of any stray untracked files
+                shellcmd = ["git", "--work-tree=%s" % reporoot, "clean", "-f"]
+                runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+
+                # Fall back to git apply
+                shellcmd = ["git", "--git-dir=%s" % reporoot, "apply", "-p%s" % patch['strippath']]
+                try:
+                    output = _applypatchhelper(shellcmd, patch, force, reverse, run)
+                except CmdError:
+                    # Fall back to patch
+                    output = PatchTree._applypatch(self, patch, force, reverse, run)
+                output += self._commitpatch(patch, patchfilevar)
+                return output
+        except:
+            patch_applied = False
+            raise
+        finally:
+            if patch_applied:
+                GitApplyTree.addNote(self.dir, "HEAD", GitApplyTree.original_patch, os.path.basename(patch['file']))
+
+
+class QuiltTree(PatchSet):
+    def _runcmd(self, args, run = True):
+        quiltrc = self.d.getVar('QUILTRCFILE')
+        if not run:
+            return ["quilt"] + ["--quiltrc"] + [quiltrc] + args
+        runcmd(["quilt"] + ["--quiltrc"] + [quiltrc] + args, self.dir)
+
+    def _quiltpatchpath(self, file):
+        return os.path.join(self.dir, "patches", os.path.basename(file))
+
+
+    def __init__(self, dir, d):
+        PatchSet.__init__(self, dir, d)
+        self.initialized = False
+        p = os.path.join(self.dir, 'patches')
+        if not os.path.exists(p):
+            os.makedirs(p)
+
+    def Clean(self):
+        try:
+            # make sure that patches/series file exists before quilt pop to keep quilt-0.67 happy
+            open(os.path.join(self.dir, "patches","series"), 'a').close()
+            self._runcmd(["pop", "-a", "-f"])
+            oe.path.remove(os.path.join(self.dir, "patches","series"))
+        except Exception:
+            pass
+        self.initialized = True
+
+    def InitFromDir(self):
+        # read series -> self.patches
+        seriespath = os.path.join(self.dir, 'patches', 'series')
+        if not os.path.exists(self.dir):
+            raise NotFoundError(self.dir)
+        if os.path.exists(seriespath):
+            with open(seriespath, 'r') as f:
+                for line in f.readlines():
+                    patch = {}
+                    parts = line.strip().split()
+                    patch["quiltfile"] = self._quiltpatchpath(parts[0])
+                    patch["quiltfilemd5"] = bb.utils.md5_file(patch["quiltfile"])
+                    if len(parts) > 1:
+                        patch["strippath"] = parts[1][2:]
+                    self.patches.append(patch)
+
+            # determine which patches are applied -> self._current
+            try:
+                output = runcmd(["quilt", "applied"], self.dir)
+            except CmdError:
+                import sys
+                if sys.exc_value.output.strip() == "No patches applied":
+                    return
+                else:
+                    raise
+            output = [val for val in output.split('\n') if not val.startswith('#')]
+            for patch in self.patches:
+                if os.path.basename(patch["quiltfile"]) == output[-1]:
+                    self._current = self.patches.index(patch)
+        self.initialized = True
+
+    def Import(self, patch, force = None):
+        if not self.initialized:
+            self.InitFromDir()
+        PatchSet.Import(self, patch, force)
+        oe.path.symlink(patch["file"], self._quiltpatchpath(patch["file"]), force=True)
+        with open(os.path.join(self.dir, "patches", "series"), "a") as f:
+            f.write(os.path.basename(patch["file"]) + " -p" + patch["strippath"] + "\n")
+        patch["quiltfile"] = self._quiltpatchpath(patch["file"])
+        patch["quiltfilemd5"] = bb.utils.md5_file(patch["quiltfile"])
+
+        # TODO: determine if the file being imported:
+        #      1) is already imported, and is the same
+        #      2) is already imported, but differs
+
+        self.patches.insert(self._current or 0, patch)
+
+
+    def Push(self, force = False, all = False, run = True):
+        # quilt push [-f]
+
+        args = ["push"]
+        if force:
+            args.append("-f")
+        if all:
+            args.append("-a")
+        if not run:
+            return self._runcmd(args, run)
+
+        self._runcmd(args)
+
+        if self._current is not None:
+            self._current = self._current + 1
+        else:
+            self._current = 0
+
+    def Pop(self, force = None, all = None):
+        # quilt pop [-f]
+        args = ["pop"]
+        if force:
+            args.append("-f")
+        if all:
+            args.append("-a")
+
+        self._runcmd(args)
+
+        if self._current == 0:
+            self._current = None
+
+        if self._current is not None:
+            self._current = self._current - 1
+
+    def Refresh(self, **kwargs):
+        if kwargs.get("remote"):
+            patch = self.patches[kwargs["patch"]]
+            if not patch:
+                raise PatchError("No patch found at index %s in patchset." % kwargs["patch"])
+            (type, host, path, user, pswd, parm) = bb.fetch.decodeurl(patch["remote"])
+            if type == "file":
+                import shutil
+                if not patch.get("file") and patch.get("remote"):
+                    patch["file"] = bb.fetch2.localpath(patch["remote"], self.d)
+
+                shutil.copyfile(patch["quiltfile"], patch["file"])
+            else:
+                raise PatchError("Unable to do a remote refresh of %s, unsupported remote url scheme %s." % (os.path.basename(patch["quiltfile"]), type))
+        else:
+            # quilt refresh
+            args = ["refresh"]
+            if kwargs.get("quiltfile"):
+                args.append(os.path.basename(kwargs["quiltfile"]))
+            elif kwargs.get("patch"):
+                args.append(os.path.basename(self.patches[kwargs["patch"]]["quiltfile"]))
+            self._runcmd(args)
+
+class Resolver(object):
+    def __init__(self, patchset, terminal):
+        raise NotImplementedError()
+
+    def Resolve(self):
+        raise NotImplementedError()
+
+    def Revert(self):
+        raise NotImplementedError()
+
+    def Finalize(self):
+        raise NotImplementedError()
+
+class NOOPResolver(Resolver):
+    def __init__(self, patchset, terminal):
+        self.patchset = patchset
+        self.terminal = terminal
+
+    def Resolve(self):
+        olddir = os.path.abspath(os.curdir)
+        os.chdir(self.patchset.dir)
+        try:
+            self.patchset.Push()
+        except Exception:
+            import sys
+            raise
+        finally:
+            os.chdir(olddir)
+
+# Patch resolver which relies on the user doing all the work involved in the
+# resolution, with the exception of refreshing the remote copy of the patch
+# files (the urls).
+class UserResolver(Resolver):
+    def __init__(self, patchset, terminal):
+        self.patchset = patchset
+        self.terminal = terminal
+
+    # Force a push in the patchset, then drop to a shell for the user to
+    # resolve any rejected hunks
+    def Resolve(self):
+        olddir = os.path.abspath(os.curdir)
+        os.chdir(self.patchset.dir)
+        try:
+            self.patchset.Push(False)
+        except CmdError as v:
+            # Patch application failed
+            patchcmd = self.patchset.Push(True, False, False)
+
+            t = self.patchset.d.getVar('T')
+            if not t:
+                bb.msg.fatal("Build", "T not set")
+            bb.utils.mkdirhier(t)
+            import random
+            rcfile = "%s/bashrc.%s.%s" % (t, str(os.getpid()), random.random())
+            with open(rcfile, "w") as f:
+                f.write("echo '*** Manual patch resolution mode ***'\n")
+                f.write("echo 'Dropping to a shell, so patch rejects can be fixed manually.'\n")
+                f.write("echo 'Run \"quilt refresh\" when patch is corrected, press CTRL+D to exit.'\n")
+                f.write("echo ''\n")
+                f.write(" ".join(patchcmd) + "\n")
+            os.chmod(rcfile, 0o775)
+
+            self.terminal("bash --rcfile " + rcfile, 'Patch Rejects: Please fix patch rejects manually', self.patchset.d)
+
+            # Construct a new PatchSet after the user's changes, compare the
+            # sets, checking patches for modifications, and doing a remote
+            # refresh on each.
+            oldpatchset = self.patchset
+            self.patchset = oldpatchset.__class__(self.patchset.dir, self.patchset.d)
+
+            for patch in self.patchset.patches:
+                oldpatch = None
+                for opatch in oldpatchset.patches:
+                    if opatch["quiltfile"] == patch["quiltfile"]:
+                        oldpatch = opatch
+
+                if oldpatch:
+                    patch["remote"] = oldpatch["remote"]
+                    if patch["quiltfile"] == oldpatch["quiltfile"]:
+                        if patch["quiltfilemd5"] != oldpatch["quiltfilemd5"]:
+                            bb.note("Patch %s has changed, updating remote url %s" % (os.path.basename(patch["quiltfile"]), patch["remote"]))
+                            # user change?  remote refresh
+                            self.patchset.Refresh(remote=True, patch=self.patchset.patches.index(patch))
+                        else:
+                            # User did not fix the problem.  Abort.
+                            raise PatchError("Patch application failed, and user did not fix and refresh the patch.")
+        except Exception:
+            raise
+        finally:
+            os.chdir(olddir)
+
+
+def patch_path(url, fetch, workdir, expand=True):
+    """Return the local path of a patch, or return nothing if this isn't a patch"""
+
+    local = fetch.localpath(url)
+    if os.path.isdir(local):
+        return
+    base, ext = os.path.splitext(os.path.basename(local))
+    if ext in ('.gz', '.bz2', '.xz', '.Z'):
+        if expand:
+            local = os.path.join(workdir, base)
+        ext = os.path.splitext(base)[1]
+
+    urldata = fetch.ud[url]
+    if "apply" in urldata.parm:
+        apply = oe.types.boolean(urldata.parm["apply"])
+        if not apply:
+            return
+    elif ext not in (".diff", ".patch"):
+        return
+
+    return local
+
+def src_patches(d, all=False, expand=True):
+    workdir = d.getVar('WORKDIR')
+    fetch = bb.fetch2.Fetch([], d)
+    patches = []
+    sources = []
+    for url in fetch.urls:
+        local = patch_path(url, fetch, workdir, expand)
+        if not local:
+            if all:
+                local = fetch.localpath(url)
+                sources.append(local)
+            continue
+
+        urldata = fetch.ud[url]
+        parm = urldata.parm
+        patchname = parm.get('pname') or os.path.basename(local)
+
+        apply, reason = should_apply(parm, d)
+        if not apply:
+            if reason:
+                bb.note("Patch %s %s" % (patchname, reason))
+            continue
+
+        patchparm = {'patchname': patchname}
+        if "striplevel" in parm:
+            striplevel = parm["striplevel"]
+        elif "pnum" in parm:
+            #bb.msg.warn(None, "Deprecated usage of 'pnum' url parameter in '%s', please use 'striplevel'" % url)
+            striplevel = parm["pnum"]
+        else:
+            striplevel = '1'
+        patchparm['striplevel'] = striplevel
+
+        patchdir = parm.get('patchdir')
+        if patchdir:
+            patchparm['patchdir'] = patchdir
+
+        localurl = bb.fetch.encodeurl(('file', '', local, '', '', patchparm))
+        patches.append(localurl)
+
+    if all:
+        return sources
+
+    return patches
+
+
+def should_apply(parm, d):
+    import bb.utils
+    if "mindate" in parm or "maxdate" in parm:
+        pn = d.getVar('PN')
+        srcdate = d.getVar('SRCDATE_%s' % pn)
+        if not srcdate:
+            srcdate = d.getVar('SRCDATE')
+
+        if srcdate == "now":
+            srcdate = d.getVar('DATE')
+
+        if "maxdate" in parm and parm["maxdate"] < srcdate:
+            return False, 'is outdated'
+
+        if "mindate" in parm and parm["mindate"] > srcdate:
+            return False, 'is predated'
+
+
+    if "minrev" in parm:
+        srcrev = d.getVar('SRCREV')
+        if srcrev and srcrev < parm["minrev"]:
+            return False, 'applies to later revisions'
+
+    if "maxrev" in parm:
+        srcrev = d.getVar('SRCREV')
+        if srcrev and srcrev > parm["maxrev"]:
+            return False, 'applies to earlier revisions'
+
+    if "rev" in parm:
+        srcrev = d.getVar('SRCREV')
+        if srcrev and parm["rev"] not in srcrev:
+            return False, "doesn't apply to revision"
+
+    if "notrev" in parm:
+        srcrev = d.getVar('SRCREV')
+        if srcrev and parm["notrev"] in srcrev:
+            return False, "doesn't apply to revision"
+
+    if "maxver" in parm:
+        pv = d.getVar('PV')
+        if bb.utils.vercmp_string_op(pv, parm["maxver"], ">"):
+            return False, "applies to earlier version"
+
+    if "minver" in parm:
+        pv = d.getVar('PV')
+        if bb.utils.vercmp_string_op(pv, parm["minver"], "<"):
+            return False, "applies to later version"
+
+    return True, None
diff --git a/meta-xilinx-core/lib/oe/path.py b/meta-xilinx-core/lib/oe/path.py
new file mode 100644
index 00000000..5d21cdcb
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/path.py
@@ -0,0 +1,349 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import errno
+import glob
+import shutil
+import subprocess
+import os.path
+
+def join(*paths):
+    """Like os.path.join but doesn't treat absolute RHS specially"""
+    return os.path.normpath("/".join(paths))
+
+def relative(src, dest):
+    """ Return a relative path from src to dest.
+
+    >>> relative("/usr/bin", "/tmp/foo/bar")
+    ../../tmp/foo/bar
+
+    >>> relative("/usr/bin", "/usr/lib")
+    ../lib
+
+    >>> relative("/tmp", "/tmp/foo/bar")
+    foo/bar
+    """
+
+    return os.path.relpath(dest, src)
+
+def make_relative_symlink(path):
+    """ Convert an absolute symlink to a relative one """
+    if not os.path.islink(path):
+        return
+    link = os.readlink(path)
+    if not os.path.isabs(link):
+        return
+
+    # find the common ancestor directory
+    ancestor = path
+    depth = 0
+    while ancestor and not link.startswith(ancestor):
+        ancestor = ancestor.rpartition('/')[0]
+        depth += 1
+
+    if not ancestor:
+        print("make_relative_symlink() Error: unable to find the common ancestor of %s and its target" % path)
+        return
+
+    base = link.partition(ancestor)[2].strip('/')
+    while depth > 1:
+        base = "../" + base
+        depth -= 1
+
+    os.remove(path)
+    os.symlink(base, path)
+
+def replace_absolute_symlinks(basedir, d):
+    """
+    Walk basedir looking for absolute symlinks and replacing them with relative ones.
+    The absolute links are assumed to be relative to basedir
+    (compared to make_relative_symlink above which tries to compute common ancestors
+    using pattern matching instead)
+    """
+    for walkroot, dirs, files in os.walk(basedir):
+        for file in files + dirs:
+            path = os.path.join(walkroot, file)
+            if not os.path.islink(path):
+                continue
+            link = os.readlink(path)
+            if not os.path.isabs(link):
+                continue
+            walkdir = os.path.dirname(path.rpartition(basedir)[2])
+            base = os.path.relpath(link, walkdir)
+            bb.debug(2, "Replacing absolute path %s with relative path %s" % (link, base))
+            os.remove(path)
+            os.symlink(base, path)
+
+def format_display(path, metadata):
+    """ Prepare a path for display to the user. """
+    rel = relative(metadata.getVar("TOPDIR"), path)
+    if len(rel) > len(path):
+        return path
+    else:
+        return rel
+
+def copytree(src, dst):
+    # We could use something like shutil.copytree here but it turns out to
+    # to be slow. It takes twice as long copying to an empty directory. 
+    # If dst already has contents performance can be 15 time slower
+    # This way we also preserve hardlinks between files in the tree.
+
+    bb.utils.mkdirhier(dst)
+    cmd = "tar --xattrs --xattrs-include='*' -cf - -S -C %s -p . | tar --xattrs --xattrs-include='*' -xf - -C %s" % (src, dst)
+    subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
+
+def copyhardlinktree(src, dst):
+    """Make a tree of hard links when possible, otherwise copy."""
+    bb.utils.mkdirhier(dst)
+    if os.path.isdir(src) and not len(os.listdir(src)):
+        return
+
+    canhard = False
+    testfile = None
+    for root, dirs, files in os.walk(src):
+        if len(files):
+            testfile = os.path.join(root, files[0])
+            break
+
+    if testfile is not None:
+        try:
+            os.link(testfile, os.path.join(dst, 'testfile'))
+            os.unlink(os.path.join(dst, 'testfile'))
+            canhard = True
+        except Exception as e:
+            bb.debug(2, "Hardlink test failed with " + str(e))
+
+    if (canhard):
+        # Need to copy directories only with tar first since cp will error if two 
+        # writers try and create a directory at the same time
+        cmd = "cd %s; find . -type d -print | tar --xattrs --xattrs-include='*' -cf - -S -C %s -p --no-recursion --files-from - | tar --xattrs --xattrs-include='*' -xhf - -C %s" % (src, src, dst)
+        subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
+        source = ''
+        if os.path.isdir(src):
+            if len(glob.glob('%s/.??*' % src)) > 0:
+                source = './.??* '
+            if len(glob.glob('%s/**' % src)) > 0:
+                source += './*'
+            s_dir = src
+        else:
+            source = src
+            s_dir = os.getcwd()
+        cmd = 'cp -afl --preserve=xattr %s %s' % (source, os.path.realpath(dst))
+        subprocess.check_output(cmd, shell=True, cwd=s_dir, stderr=subprocess.STDOUT)
+    else:
+        copytree(src, dst)
+
+def copyhardlink(src, dst):
+    """Make a hard link when possible, otherwise copy."""
+
+    try:
+        os.link(src, dst)
+    except OSError:
+        shutil.copy(src, dst)
+
+def remove(path, recurse=True):
+    """
+    Equivalent to rm -f or rm -rf
+    NOTE: be careful about passing paths that may contain filenames with
+    wildcards in them (as opposed to passing an actual wildcarded path) -
+    since we use glob.glob() to expand the path. Filenames containing
+    square brackets are particularly problematic since the they may not
+    actually expand to match the original filename.
+    """
+    for name in glob.glob(path):
+        try:
+            os.unlink(name)
+        except OSError as exc:
+            if recurse and exc.errno == errno.EISDIR:
+                shutil.rmtree(name)
+            elif exc.errno != errno.ENOENT:
+                raise
+
+def symlink(source, destination, force=False):
+    """Create a symbolic link"""
+    try:
+        if force:
+            remove(destination)
+        os.symlink(source, destination)
+    except OSError as e:
+        if e.errno != errno.EEXIST or os.readlink(destination) != source:
+            raise
+
+def relsymlink(target, name, force=False):
+    symlink(os.path.relpath(target, os.path.dirname(name)), name, force=force)
+
+def find(dir, **walkoptions):
+    """ Given a directory, recurses into that directory,
+    returning all files as absolute paths. """
+
+    for root, dirs, files in os.walk(dir, **walkoptions):
+        for file in files:
+            yield os.path.join(root, file)
+
+
+## realpath() related functions
+def __is_path_below(file, root):
+    return (file + os.path.sep).startswith(root)
+
+def __realpath_rel(start, rel_path, root, loop_cnt, assume_dir):
+    """Calculates real path of symlink 'start' + 'rel_path' below
+    'root'; no part of 'start' below 'root' must contain symlinks. """
+    have_dir = True
+
+    for d in rel_path.split(os.path.sep):
+        if not have_dir and not assume_dir:
+            raise OSError(errno.ENOENT, "no such directory %s" % start)
+
+        if d == os.path.pardir: # '..'
+            if len(start) >= len(root):
+                # do not follow '..' before root
+                start = os.path.dirname(start)
+            else:
+                # emit warning?
+                pass
+        else:
+            (start, have_dir) = __realpath(os.path.join(start, d),
+                                           root, loop_cnt, assume_dir)
+
+        assert(__is_path_below(start, root))
+
+    return start
+
+def __realpath(file, root, loop_cnt, assume_dir):
+    while os.path.islink(file) and len(file) >= len(root):
+        if loop_cnt == 0:
+            raise OSError(errno.ELOOP, file)
+
+        loop_cnt -= 1
+        target = os.path.normpath(os.readlink(file))
+
+        if not os.path.isabs(target):
+            tdir = os.path.dirname(file)
+            assert(__is_path_below(tdir, root))
+        else:
+            tdir = root
+
+        file = __realpath_rel(tdir, target, root, loop_cnt, assume_dir)
+
+    try:
+        is_dir = os.path.isdir(file)
+    except:
+        is_dir = false
+
+    return (file, is_dir)
+
+def realpath(file, root, use_physdir = True, loop_cnt = 100, assume_dir = False):
+    """ Returns the canonical path of 'file' with assuming a
+    toplevel 'root' directory. When 'use_physdir' is set, all
+    preceding path components of 'file' will be resolved first;
+    this flag should be set unless it is guaranteed that there is
+    no symlink in the path. When 'assume_dir' is not set, missing
+    path components will raise an ENOENT error"""
+
+    root = os.path.normpath(root)
+    file = os.path.normpath(file)
+
+    if not root.endswith(os.path.sep):
+        # letting root end with '/' makes some things easier
+        root = root + os.path.sep
+
+    if not __is_path_below(file, root):
+        raise OSError(errno.EINVAL, "file '%s' is not below root" % file)
+
+    try:
+        if use_physdir:
+            file = __realpath_rel(root, file[(len(root) - 1):], root, loop_cnt, assume_dir)
+        else:
+            file = __realpath(file, root, loop_cnt, assume_dir)[0]
+    except OSError as e:
+        if e.errno == errno.ELOOP:
+            # make ELOOP more readable; without catching it, there will
+            # be printed a backtrace with 100s of OSError exceptions
+            # else
+            raise OSError(errno.ELOOP,
+                          "too much recursions while resolving '%s'; loop in '%s'" %
+                          (file, e.strerror))
+
+        raise
+
+    return file
+
+def is_path_parent(possible_parent, *paths):
+    """
+    Return True if a path is the parent of another, False otherwise.
+    Multiple paths to test can be specified in which case all
+    specified test paths must be under the parent in order to
+    return True.
+    """
+    def abs_path_trailing(pth):
+        pth_abs = os.path.abspath(pth)
+        if not pth_abs.endswith(os.sep):
+            pth_abs += os.sep
+        return pth_abs
+
+    possible_parent_abs = abs_path_trailing(possible_parent)
+    if not paths:
+        return False
+    for path in paths:
+        path_abs = abs_path_trailing(path)
+        if not path_abs.startswith(possible_parent_abs):
+            return False
+    return True
+
+def which_wild(pathname, path=None, mode=os.F_OK, *, reverse=False, candidates=False):
+    """Search a search path for pathname, supporting wildcards.
+
+    Return all paths in the specific search path matching the wildcard pattern
+    in pathname, returning only the first encountered for each file. If
+    candidates is True, information on all potential candidate paths are
+    included.
+    """
+    paths = (path or os.environ.get('PATH', os.defpath)).split(':')
+    if reverse:
+        paths.reverse()
+
+    seen, files = set(), []
+    for index, element in enumerate(paths):
+        if not os.path.isabs(element):
+            element = os.path.abspath(element)
+
+        candidate = os.path.join(element, pathname)
+        globbed = glob.glob(candidate)
+        if globbed:
+            for found_path in sorted(globbed):
+                if not os.access(found_path, mode):
+                    continue
+                rel = os.path.relpath(found_path, element)
+                if rel not in seen:
+                    seen.add(rel)
+                    if candidates:
+                        files.append((found_path, [os.path.join(p, rel) for p in paths[:index+1]]))
+                    else:
+                        files.append(found_path)
+
+    return files
+
+def canonicalize(paths, sep=','):
+    """Given a string with paths (separated by commas by default), expand
+    each path using os.path.realpath() and return the resulting paths as a
+    string (separated using the same separator a the original string).
+    """
+    # Ignore paths containing "$" as they are assumed to be unexpanded bitbake
+    # variables. Normally they would be ignored, e.g., when passing the paths
+    # through the shell they would expand to empty strings. However, when they
+    # are passed through os.path.realpath(), it will cause them to be prefixed
+    # with the absolute path to the current directory and thus not be empty
+    # anymore.
+    #
+    # Also maintain trailing slashes, as the paths may actually be used as
+    # prefixes in sting compares later on, where the slashes then are important.
+    canonical_paths = []
+    for path in (paths or '').split(sep):
+        if '$' not in path:
+            trailing_slash = path.endswith('/') and '/' or ''
+            canonical_paths.append(os.path.realpath(path) + trailing_slash)
+
+    return sep.join(canonical_paths)
diff --git a/meta-xilinx-core/lib/oe/prservice.py b/meta-xilinx-core/lib/oe/prservice.py
new file mode 100644
index 00000000..c41242c8
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/prservice.py
@@ -0,0 +1,127 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+def prserv_make_conn(d, check = False):
+    import prserv.serv
+    host_params = list([_f for _f in (d.getVar("PRSERV_HOST") or '').split(':') if _f])
+    try:
+        conn = None
+        conn = prserv.serv.connect(host_params[0], int(host_params[1]))
+        if check:
+            if not conn.ping():
+                raise Exception('service not available')
+    except Exception as exc:
+        bb.fatal("Connecting to PR service %s:%s failed: %s" % (host_params[0], host_params[1], str(exc)))
+
+    return conn
+
+def prserv_dump_db(d):
+    if not d.getVar('PRSERV_HOST'):
+        bb.error("Not using network based PR service")
+        return None
+
+    conn = prserv_make_conn(d)
+    if conn is None:
+        bb.error("Making connection failed to remote PR service")
+        return None
+
+    #dump db
+    opt_version = d.getVar('PRSERV_DUMPOPT_VERSION')
+    opt_pkgarch = d.getVar('PRSERV_DUMPOPT_PKGARCH')
+    opt_checksum = d.getVar('PRSERV_DUMPOPT_CHECKSUM')
+    opt_col = ("1" == d.getVar('PRSERV_DUMPOPT_COL'))
+    d = conn.export(opt_version, opt_pkgarch, opt_checksum, opt_col)
+    conn.close()
+    return d
+
+def prserv_import_db(d, filter_version=None, filter_pkgarch=None, filter_checksum=None):
+    if not d.getVar('PRSERV_HOST'):
+        bb.error("Not using network based PR service")
+        return None
+
+    conn = prserv_make_conn(d)
+    if conn is None:
+        bb.error("Making connection failed to remote PR service")
+        return None
+    #get the entry values
+    imported = []
+    prefix = "PRAUTO$"
+    for v in d.keys():
+        if v.startswith(prefix):
+            (remain, sep, checksum) = v.rpartition('$')
+            (remain, sep, pkgarch) = remain.rpartition('$')
+            (remain, sep, version) = remain.rpartition('$')
+            if (remain + '$' != prefix) or \
+               (filter_version and filter_version != version) or \
+               (filter_pkgarch and filter_pkgarch != pkgarch) or \
+               (filter_checksum and filter_checksum != checksum):
+               continue
+            try:
+                value = int(d.getVar(remain + '$' + version + '$' + pkgarch + '$' + checksum))
+            except BaseException as exc:
+                bb.debug("Not valid value of %s:%s" % (v,str(exc)))
+                continue
+            ret = conn.importone(version,pkgarch,checksum,value)
+            if ret != value:
+                bb.error("importing(%s,%s,%s,%d) failed. DB may have larger value %d" % (version,pkgarch,checksum,value,ret))
+            else:
+               imported.append((version,pkgarch,checksum,value))
+    conn.close()
+    return imported
+
+def prserv_export_tofile(d, metainfo, datainfo, lockdown, nomax=False):
+    import bb.utils
+    #initilize the output file
+    bb.utils.mkdirhier(d.getVar('PRSERV_DUMPDIR'))
+    df = d.getVar('PRSERV_DUMPFILE')
+    #write data
+    with open(df, "a") as f, bb.utils.fileslocked(["%s.lock" % df]) as locks:
+        if metainfo:
+            #dump column info
+            f.write("#PR_core_ver = \"%s\"\n\n" % metainfo['core_ver']);
+            f.write("#Table: %s\n" % metainfo['tbl_name'])
+            f.write("#Columns:\n")
+            f.write("#name      \t type    \t notn    \t dflt    \t pk\n")
+            f.write("#----------\t --------\t --------\t --------\t ----\n")
+            for i in range(len(metainfo['col_info'])):
+                f.write("#%10s\t %8s\t %8s\t %8s\t %4s\n" %
+                        (metainfo['col_info'][i]['name'],
+                         metainfo['col_info'][i]['type'],
+                         metainfo['col_info'][i]['notnull'],
+                         metainfo['col_info'][i]['dflt_value'],
+                         metainfo['col_info'][i]['pk']))
+            f.write("\n")
+
+        if lockdown:
+            f.write("PRSERV_LOCKDOWN = \"1\"\n\n")
+
+        if datainfo:
+            idx = {}
+            for i in range(len(datainfo)):
+                pkgarch = datainfo[i]['pkgarch']
+                value = datainfo[i]['value']
+                if pkgarch not in idx:
+                    idx[pkgarch] = i
+                elif value > datainfo[idx[pkgarch]]['value']:
+                    idx[pkgarch] = i
+                f.write("PRAUTO$%s$%s$%s = \"%s\"\n" %
+                    (str(datainfo[i]['version']), pkgarch, str(datainfo[i]['checksum']), str(value)))
+            if not nomax:
+                for i in idx:
+                    f.write("PRAUTO_%s_%s = \"%s\"\n" % (str(datainfo[idx[i]]['version']),str(datainfo[idx[i]]['pkgarch']),str(datainfo[idx[i]]['value'])))
+
+def prserv_check_avail(d):
+    host_params = list([_f for _f in (d.getVar("PRSERV_HOST") or '').split(':') if _f])
+    try:
+        if len(host_params) != 2:
+            raise TypeError
+        else:
+            int(host_params[1])
+    except TypeError:
+        bb.fatal('Undefined/incorrect PRSERV_HOST value. Format: "host:port"')
+    else:
+        conn = prserv_make_conn(d, True)
+        conn.close()
diff --git a/meta-xilinx-core/lib/oe/qa.py b/meta-xilinx-core/lib/oe/qa.py
new file mode 100644
index 00000000..f8ae3c74
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/qa.py
@@ -0,0 +1,238 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import os, struct, mmap
+
+class NotELFFileError(Exception):
+    pass
+
+class ELFFile:
+    EI_NIDENT = 16
+
+    EI_CLASS      = 4
+    EI_DATA       = 5
+    EI_VERSION    = 6
+    EI_OSABI      = 7
+    EI_ABIVERSION = 8
+
+    E_MACHINE    = 0x12
+
+    # possible values for EI_CLASS
+    ELFCLASSNONE = 0
+    ELFCLASS32   = 1
+    ELFCLASS64   = 2
+
+    # possible value for EI_VERSION
+    EV_CURRENT   = 1
+
+    # possible values for EI_DATA
+    EI_DATA_NONE  = 0
+    EI_DATA_LSB  = 1
+    EI_DATA_MSB  = 2
+
+    PT_INTERP = 3
+
+    def my_assert(self, expectation, result):
+        if not expectation == result:
+            #print "'%x','%x' %s" % (ord(expectation), ord(result), self.name)
+            raise NotELFFileError("%s is not an ELF" % self.name)
+
+    def __init__(self, name):
+        self.name = name
+        self.objdump_output = {}
+        self.data = None
+
+    # Context Manager functions to close the mmap explicitly
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self.close()
+
+    def close(self):
+        if self.data:
+            self.data.close()
+
+    def open(self):
+        with open(self.name, "rb") as f:
+            try:
+                self.data = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ)
+            except ValueError:
+                # This means the file is empty
+                raise NotELFFileError("%s is empty" % self.name)
+
+        # Check the file has the minimum number of ELF table entries
+        if len(self.data) < ELFFile.EI_NIDENT + 4:
+            raise NotELFFileError("%s is not an ELF" % self.name)
+
+        # ELF header
+        self.my_assert(self.data[0], 0x7f)
+        self.my_assert(self.data[1], ord('E'))
+        self.my_assert(self.data[2], ord('L'))
+        self.my_assert(self.data[3], ord('F'))
+        if self.data[ELFFile.EI_CLASS] == ELFFile.ELFCLASS32:
+            self.bits = 32
+        elif self.data[ELFFile.EI_CLASS] == ELFFile.ELFCLASS64:
+            self.bits = 64
+        else:
+            # Not 32-bit or 64.. lets assert
+            raise NotELFFileError("ELF but not 32 or 64 bit.")
+        self.my_assert(self.data[ELFFile.EI_VERSION], ELFFile.EV_CURRENT)
+
+        self.endian = self.data[ELFFile.EI_DATA]
+        if self.endian not in (ELFFile.EI_DATA_LSB, ELFFile.EI_DATA_MSB):
+            raise NotELFFileError("Unexpected EI_DATA %x" % self.endian)
+
+    def osAbi(self):
+        return self.data[ELFFile.EI_OSABI]
+
+    def abiVersion(self):
+        return self.data[ELFFile.EI_ABIVERSION]
+
+    def abiSize(self):
+        return self.bits
+
+    def isLittleEndian(self):
+        return self.endian == ELFFile.EI_DATA_LSB
+
+    def isBigEndian(self):
+        return self.endian == ELFFile.EI_DATA_MSB
+
+    def getStructEndian(self):
+        return {ELFFile.EI_DATA_LSB: "<",
+                ELFFile.EI_DATA_MSB: ">"}[self.endian]
+
+    def getShort(self, offset):
+        return struct.unpack_from(self.getStructEndian() + "H", self.data, offset)[0]
+
+    def getWord(self, offset):
+        return struct.unpack_from(self.getStructEndian() + "i", self.data, offset)[0]
+
+    def isDynamic(self):
+        """
+        Return True if there is a .interp segment (therefore dynamically
+        linked), otherwise False (statically linked).
+        """
+        offset = self.getWord(self.bits == 32 and 0x1C or 0x20)
+        size = self.getShort(self.bits == 32 and 0x2A or 0x36)
+        count = self.getShort(self.bits == 32 and 0x2C or 0x38)
+
+        for i in range(0, count):
+            p_type = self.getWord(offset + i * size)
+            if p_type == ELFFile.PT_INTERP:
+                return True
+        return False
+
+    def machine(self):
+        """
+        We know the endian stored in self.endian and we
+        know the position
+        """
+        return self.getShort(ELFFile.E_MACHINE)
+
+    def set_objdump(self, cmd, output):
+        self.objdump_output[cmd] = output
+
+    def run_objdump(self, cmd, d):
+        import bb.process
+        import sys
+
+        if cmd in self.objdump_output:
+            return self.objdump_output[cmd]
+
+        objdump = d.getVar('OBJDUMP')
+
+        env = os.environ.copy()
+        env["LC_ALL"] = "C"
+        env["PATH"] = d.getVar('PATH')
+
+        try:
+            bb.note("%s %s %s" % (objdump, cmd, self.name))
+            self.objdump_output[cmd] = bb.process.run([objdump, cmd, self.name], env=env, shell=False)[0]
+            return self.objdump_output[cmd]
+        except Exception as e:
+            bb.note("%s %s %s failed: %s" % (objdump, cmd, self.name, e))
+            return ""
+
+def elf_machine_to_string(machine):
+    """
+    Return the name of a given ELF e_machine field or the hex value as a string
+    if it isn't recognised.
+    """
+    try:
+        return {
+            0x00: "Unset",
+            0x02: "SPARC",
+            0x03: "x86",
+            0x08: "MIPS",
+            0x14: "PowerPC",
+            0x28: "ARM",
+            0x2A: "SuperH",
+            0x32: "IA-64",
+            0x3E: "x86-64",
+            0xB7: "AArch64",
+            0xF7: "BPF"
+        }[machine]
+    except:
+        return "Unknown (%s)" % repr(machine)
+
+def write_error(type, error, d):
+    logfile = d.getVar('QA_LOGFILE')
+    if logfile:
+        p = d.getVar('P')
+        with open(logfile, "a+") as f:
+            f.write("%s: %s [%s]\n" % (p, error, type))
+
+def handle_error(error_class, error_msg, d):
+    if error_class in (d.getVar("ERROR_QA") or "").split():
+        write_error(error_class, error_msg, d)
+        bb.error("QA Issue: %s [%s]" % (error_msg, error_class))
+        d.setVar("QA_ERRORS_FOUND", "True")
+        return False
+    elif error_class in (d.getVar("WARN_QA") or "").split():
+        write_error(error_class, error_msg, d)
+        bb.warn("QA Issue: %s [%s]" % (error_msg, error_class))
+    else:
+        bb.note("QA Issue: %s [%s]" % (error_msg, error_class))
+    return True
+
+def add_message(messages, section, new_msg):
+    if section not in messages:
+        messages[section] = new_msg
+    else:
+        messages[section] = messages[section] + "\n" + new_msg
+
+def exit_with_message_if_errors(message, d):
+    qa_fatal_errors = bb.utils.to_boolean(d.getVar("QA_ERRORS_FOUND"), False)
+    if qa_fatal_errors:
+        bb.fatal(message)
+
+def exit_if_errors(d):
+    exit_with_message_if_errors("Fatal QA errors were found, failing task.", d)
+
+def check_upstream_status(fullpath):
+    import re
+    kinda_status_re = re.compile(r"^.*upstream.*status.*$", re.IGNORECASE | re.MULTILINE)
+    strict_status_re = re.compile(r"^Upstream-Status: (Pending|Submitted|Denied|Inappropriate|Backport|Inactive-Upstream)( .+)?$", re.MULTILINE)
+    guidelines = "https://docs.yoctoproject.org/contributor-guide/recipe-style-guide.html#patch-upstream-status"
+
+    with open(fullpath, encoding='utf-8', errors='ignore') as f:
+        file_content = f.read()
+        match_kinda = kinda_status_re.search(file_content)
+        match_strict = strict_status_re.search(file_content)
+
+        if not match_strict:
+            if match_kinda:
+                return "Malformed Upstream-Status in patch\n%s\nPlease correct according to %s :\n%s" % (fullpath, guidelines, match_kinda.group(0))
+            else:
+                return "Missing Upstream-Status in patch\n%s\nPlease add according to %s ." % (fullpath, guidelines)
+
+if __name__ == "__main__":
+    import sys
+
+    with ELFFile(sys.argv[1]) as elf:
+        elf.open()
+        print(elf.isDynamic())
diff --git a/meta-xilinx-core/lib/oe/recipeutils.py b/meta-xilinx-core/lib/oe/recipeutils.py
new file mode 100644
index 00000000..de1fbdd3
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/recipeutils.py
@@ -0,0 +1,1185 @@
+# Utility functions for reading and modifying recipes
+#
+# Some code borrowed from the OE layer index
+#
+# Copyright (C) 2013-2017 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import sys
+import os
+import os.path
+import tempfile
+import textwrap
+import difflib
+from . import utils
+import shutil
+import re
+import fnmatch
+import glob
+import bb.tinfoil
+
+from collections import OrderedDict, defaultdict
+from bb.utils import vercmp_string
+
+# Help us to find places to insert values
+recipe_progression = ['SUMMARY', 'DESCRIPTION', 'HOMEPAGE', 'BUGTRACKER', 'SECTION', 'LICENSE', 'LICENSE_FLAGS', 'LIC_FILES_CHKSUM', 'PROVIDES', 'DEPENDS', 'PR', 'PV', 'SRCREV', 'SRC_URI', 'S', 'do_fetch()', 'do_unpack()', 'do_patch()', 'EXTRA_OECONF', 'EXTRA_OECMAKE', 'EXTRA_OESCONS', 'do_configure()', 'EXTRA_OEMAKE', 'do_compile()', 'do_install()', 'do_populate_sysroot()', 'INITSCRIPT', 'USERADD', 'GROUPADD', 'PACKAGES', 'FILES', 'RDEPENDS', 'RRECOMMENDS', 'RSUGGESTS', 'RPROVIDES', 'RREPLACES', 'RCONFLICTS', 'ALLOW_EMPTY', 'populate_packages()', 'do_package()', 'do_deploy()', 'BBCLASSEXTEND']
+# Variables that sometimes are a bit long but shouldn't be wrapped
+nowrap_vars = ['SUMMARY', 'HOMEPAGE', 'BUGTRACKER', r'SRC_URI\[(.+\.)?md5sum\]', r'SRC_URI\[(.+\.)?sha[0-9]+sum\]']
+list_vars = ['SRC_URI', 'LIC_FILES_CHKSUM']
+meta_vars = ['SUMMARY', 'DESCRIPTION', 'HOMEPAGE', 'BUGTRACKER', 'SECTION']
+
+
+def simplify_history(history, d):
+    """
+    Eliminate any irrelevant events from a variable history
+    """
+    ret_history = []
+    has_set = False
+    # Go backwards through the history and remove any immediate operations
+    # before the most recent set
+    for event in reversed(history):
+        if 'flag' in event or not 'file' in event:
+            continue
+        if event['op'] == 'set':
+            if has_set:
+                continue
+            has_set = True
+        elif event['op'] in ('append', 'prepend', 'postdot', 'predot'):
+            # Reminder: "append" and "prepend" mean += and =+ respectively, NOT :append / :prepend
+            if has_set:
+                continue
+        ret_history.insert(0, event)
+    return ret_history
+
+
+def get_var_files(fn, varlist, d):
+    """Find the file in which each of a list of variables is set.
+    Note: requires variable history to be enabled when parsing.
+    """
+    varfiles = {}
+    for v in varlist:
+        files = []
+        if '[' in v:
+            varsplit = v.split('[')
+            varflag = varsplit[1].split(']')[0]
+            history = d.varhistory.variable(varsplit[0])
+            for event in history:
+                if 'file' in event and event.get('flag', '') == varflag:
+                    files.append(event['file'])
+        else:
+            history = d.varhistory.variable(v)
+            for event in history:
+                if 'file' in event and not 'flag' in event:
+                    files.append(event['file'])
+        if files:
+            actualfile = files[-1]
+        else:
+            actualfile = None
+        varfiles[v] = actualfile
+
+    return varfiles
+
+
+def split_var_value(value, assignment=True):
+    """
+    Split a space-separated variable's value into a list of items,
+    taking into account that some of the items might be made up of
+    expressions containing spaces that should not be split.
+    Parameters:
+        value:
+            The string value to split
+        assignment:
+            True to assume that the value represents an assignment
+            statement, False otherwise. If True, and an assignment
+            statement is passed in the first item in
+            the returned list will be the part of the assignment
+            statement up to and including the opening quote character,
+            and the last item will be the closing quote.
+    """
+    inexpr = 0
+    lastchar = None
+    out = []
+    buf = ''
+    for char in value:
+        if char == '{':
+            if lastchar == '$':
+                inexpr += 1
+        elif char == '}':
+            inexpr -= 1
+        elif assignment and char in '"\'' and inexpr == 0:
+            if buf:
+                out.append(buf)
+            out.append(char)
+            char = ''
+            buf = ''
+        elif char.isspace() and inexpr == 0:
+            char = ''
+            if buf:
+                out.append(buf)
+            buf = ''
+        buf += char
+        lastchar = char
+    if buf:
+        out.append(buf)
+
+    # Join together assignment statement and opening quote
+    outlist = out
+    if assignment:
+        assigfound = False
+        for idx, item in enumerate(out):
+            if '=' in item:
+                assigfound = True
+            if assigfound:
+                if '"' in item or "'" in item:
+                    outlist = [' '.join(out[:idx+1])]
+                    outlist.extend(out[idx+1:])
+                    break
+    return outlist
+
+
+def patch_recipe_lines(fromlines, values, trailing_newline=True):
+    """Update or insert variable values into lines from a recipe.
+       Note that some manual inspection/intervention may be required
+       since this cannot handle all situations.
+    """
+
+    import bb.utils
+
+    if trailing_newline:
+        newline = '\n'
+    else:
+        newline = ''
+
+    nowrap_vars_res = []
+    for item in nowrap_vars:
+        nowrap_vars_res.append(re.compile('^%s$' % item))
+
+    recipe_progression_res = []
+    recipe_progression_restrs = []
+    for item in recipe_progression:
+        if item.endswith('()'):
+            key = item[:-2]
+        else:
+            key = item
+        restr = r'%s(_[a-zA-Z0-9-_$(){}]+|\[[^\]]*\])?' % key
+        if item.endswith('()'):
+            recipe_progression_restrs.append(restr + '()')
+        else:
+            recipe_progression_restrs.append(restr)
+        recipe_progression_res.append(re.compile('^%s$' % restr))
+
+    def get_recipe_pos(variable):
+        for i, p in enumerate(recipe_progression_res):
+            if p.match(variable):
+                return i
+        return -1
+
+    remainingnames = {}
+    for k in values.keys():
+        remainingnames[k] = get_recipe_pos(k)
+    remainingnames = OrderedDict(sorted(remainingnames.items(), key=lambda x: x[1]))
+
+    modifying = False
+
+    def outputvalue(name, lines, rewindcomments=False):
+        if values[name] is None:
+            return
+        if isinstance(values[name], tuple):
+            op, value = values[name]
+            if op == '+=' and value.strip() == '':
+                return
+        else:
+            value = values[name]
+            op = '='
+        rawtext = '%s %s "%s"%s' % (name, op, value, newline)
+        addlines = []
+        nowrap = False
+        for nowrap_re in nowrap_vars_res:
+            if nowrap_re.match(name):
+                nowrap = True
+                break
+        if nowrap:
+            addlines.append(rawtext)
+        elif name in list_vars:
+            splitvalue = split_var_value(value, assignment=False)
+            if len(splitvalue) > 1:
+                linesplit = ' \\\n' + (' ' * (len(name) + 4))
+                addlines.append('%s %s "%s%s"%s' % (name, op, linesplit.join(splitvalue), linesplit, newline))
+            else:
+                addlines.append(rawtext)
+        else:
+            wrapped = textwrap.wrap(rawtext)
+            for wrapline in wrapped[:-1]:
+                addlines.append('%s \\%s' % (wrapline, newline))
+            addlines.append('%s%s' % (wrapped[-1], newline))
+
+        # Split on newlines - this isn't strictly necessary if you are only
+        # going to write the output to disk, but if you want to compare it
+        # (as patch_recipe_file() will do if patch=True) then it's important.
+        addlines = [line for l in addlines for line in l.splitlines(True)]
+        if rewindcomments:
+            # Ensure we insert the lines before any leading comments
+            # (that we'd want to ensure remain leading the next value)
+            for i, ln in reversed(list(enumerate(lines))):
+                if not ln.startswith('#'):
+                    lines[i+1:i+1] = addlines
+                    break
+            else:
+                lines.extend(addlines)
+        else:
+            lines.extend(addlines)
+
+    existingnames = []
+    def patch_recipe_varfunc(varname, origvalue, op, newlines):
+        if modifying:
+            # Insert anything that should come before this variable
+            pos = get_recipe_pos(varname)
+            for k in list(remainingnames):
+                if remainingnames[k] > -1 and pos >= remainingnames[k] and not k in existingnames:
+                    outputvalue(k, newlines, rewindcomments=True)
+                    del remainingnames[k]
+            # Now change this variable, if it needs to be changed
+            if varname in existingnames and op in ['+=', '=', '=+']:
+                if varname in remainingnames:
+                    outputvalue(varname, newlines)
+                    del remainingnames[varname]
+                return None, None, 0, True
+        else:
+            if varname in values:
+                existingnames.append(varname)
+        return origvalue, None, 0, True
+
+    # First run - establish which values we want to set are already in the file
+    varlist = [re.escape(item) for item in values.keys()]
+    bb.utils.edit_metadata(fromlines, varlist, patch_recipe_varfunc)
+    # Second run - actually set everything
+    modifying = True
+    varlist.extend(recipe_progression_restrs)
+    changed, tolines = bb.utils.edit_metadata(fromlines, varlist, patch_recipe_varfunc, match_overrides=True)
+
+    if remainingnames:
+        if tolines and tolines[-1].strip() != '':
+            tolines.append('\n')
+        for k in remainingnames.keys():
+            outputvalue(k, tolines)
+
+    return changed, tolines
+
+
+def patch_recipe_file(fn, values, patch=False, relpath='', redirect_output=None):
+    """Update or insert variable values into a recipe file (assuming you
+       have already identified the exact file you want to update.)
+       Note that some manual inspection/intervention may be required
+       since this cannot handle all situations.
+    """
+
+    with open(fn, 'r') as f:
+        fromlines = f.readlines()
+
+    _, tolines = patch_recipe_lines(fromlines, values)
+
+    if redirect_output:
+        with open(os.path.join(redirect_output, os.path.basename(fn)), 'w') as f:
+            f.writelines(tolines)
+        return None
+    elif patch:
+        relfn = os.path.relpath(fn, relpath)
+        diff = difflib.unified_diff(fromlines, tolines, 'a/%s' % relfn, 'b/%s' % relfn)
+        return diff
+    else:
+        with open(fn, 'w') as f:
+            f.writelines(tolines)
+        return None
+
+
+def localise_file_vars(fn, varfiles, varlist):
+    """Given a list of variables and variable history (fetched with get_var_files())
+    find where each variable should be set/changed. This handles for example where a
+    recipe includes an inc file where variables might be changed - in most cases
+    we want to update the inc file when changing the variable value rather than adding
+    it to the recipe itself.
+    """
+    fndir = os.path.dirname(fn) + os.sep
+
+    first_meta_file = None
+    for v in meta_vars:
+        f = varfiles.get(v, None)
+        if f:
+            actualdir = os.path.dirname(f) + os.sep
+            if actualdir.startswith(fndir):
+                first_meta_file = f
+                break
+
+    filevars = defaultdict(list)
+    for v in varlist:
+        f = varfiles[v]
+        # Only return files that are in the same directory as the recipe or in some directory below there
+        # (this excludes bbclass files and common inc files that wouldn't be appropriate to set the variable
+        # in if we were going to set a value specific to this recipe)
+        if f:
+            actualfile = f
+        else:
+            # Variable isn't in a file, if it's one of the "meta" vars, use the first file with a meta var in it
+            if first_meta_file:
+                actualfile = first_meta_file
+            else:
+                actualfile = fn
+
+        actualdir = os.path.dirname(actualfile) + os.sep
+        if not actualdir.startswith(fndir):
+            actualfile = fn
+        filevars[actualfile].append(v)
+
+    return filevars
+
+def patch_recipe(d, fn, varvalues, patch=False, relpath='', redirect_output=None):
+    """Modify a list of variable values in the specified recipe. Handles inc files if
+    used by the recipe.
+    """
+    overrides = d.getVar('OVERRIDES').split(':')
+    def override_applicable(hevent):
+        op = hevent['op']
+        if '[' in op:
+            opoverrides = op.split('[')[1].split(']')[0].split(':')
+            for opoverride in opoverrides:
+                if not opoverride in overrides:
+                    return False
+        return True
+
+    varlist = varvalues.keys()
+    fn = os.path.abspath(fn)
+    varfiles = get_var_files(fn, varlist, d)
+    locs = localise_file_vars(fn, varfiles, varlist)
+    patches = []
+    for f,v in locs.items():
+        vals = {k: varvalues[k] for k in v}
+        f = os.path.abspath(f)
+        if f == fn:
+            extravals = {}
+            for var, value in vals.items():
+                if var in list_vars:
+                    history = simplify_history(d.varhistory.variable(var), d)
+                    recipe_set = False
+                    for event in history:
+                        if os.path.abspath(event['file']) == fn:
+                            if event['op'] == 'set':
+                                recipe_set = True
+                    if not recipe_set:
+                        for event in history:
+                            if event['op'].startswith(':remove'):
+                                continue
+                            if not override_applicable(event):
+                                continue
+                            newvalue = value.replace(event['detail'], '')
+                            if newvalue == value and os.path.abspath(event['file']) == fn and event['op'].startswith(':'):
+                                op = event['op'].replace('[', ':').replace(']', '')
+                                extravals[var + op] = None
+                            value = newvalue
+                            vals[var] = ('+=', value)
+            vals.update(extravals)
+        patchdata = patch_recipe_file(f, vals, patch, relpath, redirect_output)
+        if patch:
+            patches.append(patchdata)
+
+    if patch:
+        return patches
+    else:
+        return None
+
+
+
+def copy_recipe_files(d, tgt_dir, whole_dir=False, download=True, all_variants=False):
+    """Copy (local) recipe files, including both files included via include/require,
+    and files referred to in the SRC_URI variable."""
+    import bb.fetch2
+    import oe.path
+
+    # FIXME need a warning if the unexpanded SRC_URI value contains variable references
+
+    uri_values = []
+    localpaths = []
+    def fetch_urls(rdata):
+        # Collect the local paths from SRC_URI
+        srcuri = rdata.getVar('SRC_URI') or ""
+        if srcuri not in uri_values:
+            fetch = bb.fetch2.Fetch(srcuri.split(), rdata)
+            if download:
+                fetch.download()
+            for pth in fetch.localpaths():
+                if pth not in localpaths:
+                    localpaths.append(os.path.abspath(pth))
+            uri_values.append(srcuri)
+
+    fetch_urls(d)
+    if all_variants:
+        # Get files for other variants e.g. in the case of a SRC_URI:append
+        localdata = bb.data.createCopy(d)
+        variants = (localdata.getVar('BBCLASSEXTEND') or '').split()
+        if variants:
+            # Ensure we handle class-target if we're dealing with one of the variants
+            variants.append('target')
+            for variant in variants:
+                localdata.setVar('CLASSOVERRIDE', 'class-%s' % variant)
+                fetch_urls(localdata)
+
+    # Copy local files to target directory and gather any remote files
+    bb_dir = os.path.abspath(os.path.dirname(d.getVar('FILE'))) + os.sep
+    remotes = []
+    copied = []
+    # Need to do this in two steps since we want to check against the absolute path
+    includes = [os.path.abspath(path) for path in d.getVar('BBINCLUDED').split() if os.path.exists(path)]
+    # We also check this below, but we don't want any items in this list being considered remotes
+    includes = [path for path in includes if path.startswith(bb_dir)]
+    for path in localpaths + includes:
+        # Only import files that are under the meta directory
+        if path.startswith(bb_dir):
+            if not whole_dir:
+                relpath = os.path.relpath(path, bb_dir)
+                subdir = os.path.join(tgt_dir, os.path.dirname(relpath))
+                if not os.path.exists(subdir):
+                    os.makedirs(subdir)
+                shutil.copy2(path, os.path.join(tgt_dir, relpath))
+                copied.append(relpath)
+        else:
+            remotes.append(path)
+    # Simply copy whole meta dir, if requested
+    if whole_dir:
+        shutil.copytree(bb_dir, tgt_dir)
+
+    return copied, remotes
+
+
+def get_recipe_local_files(d, patches=False, archives=False):
+    """Get a list of local files in SRC_URI within a recipe."""
+    import oe.patch
+    uris = (d.getVar('SRC_URI') or "").split()
+    fetch = bb.fetch2.Fetch(uris, d)
+    # FIXME this list should be factored out somewhere else (such as the
+    # fetcher) though note that this only encompasses actual container formats
+    # i.e. that can contain multiple files as opposed to those that only
+    # contain a compressed stream (i.e. .tar.gz as opposed to just .gz)
+    archive_exts = ['.tar', '.tgz', '.tar.gz', '.tar.Z', '.tbz', '.tbz2', '.tar.bz2', '.txz', '.tar.xz', '.tar.lz', '.zip', '.jar', '.rpm', '.srpm', '.deb', '.ipk', '.tar.7z', '.7z']
+    ret = {}
+    for uri in uris:
+        if fetch.ud[uri].type == 'file':
+            if (not patches and
+                    oe.patch.patch_path(uri, fetch, '', expand=False)):
+                continue
+            # Skip files that are referenced by absolute path
+            fname = fetch.ud[uri].basepath
+            if os.path.isabs(fname):
+                continue
+            # Handle subdir=
+            subdir = fetch.ud[uri].parm.get('subdir', '')
+            if subdir:
+                if os.path.isabs(subdir):
+                    continue
+                fname = os.path.join(subdir, fname)
+            localpath = fetch.localpath(uri)
+            if not archives:
+                # Ignore archives that will be unpacked
+                if localpath.endswith(tuple(archive_exts)):
+                    unpack = fetch.ud[uri].parm.get('unpack', True)
+                    if unpack:
+                        continue
+            if os.path.isdir(localpath):
+                for root, dirs, files in os.walk(localpath):
+                    for fname in files:
+                        fileabspath = os.path.join(root,fname)
+                        srcdir = os.path.dirname(localpath)
+                        ret[os.path.relpath(fileabspath,srcdir)] = fileabspath
+            else:
+                ret[fname] = localpath
+    return ret
+
+
+def get_recipe_patches(d):
+    """Get a list of the patches included in SRC_URI within a recipe."""
+    import oe.patch
+    patches = oe.patch.src_patches(d, expand=False)
+    patchfiles = []
+    for patch in patches:
+        _, _, local, _, _, parm = bb.fetch.decodeurl(patch)
+        patchfiles.append(local)
+    return patchfiles
+
+
+def get_recipe_patched_files(d):
+    """
+    Get the list of patches for a recipe along with the files each patch modifies.
+    Params:
+        d: the datastore for the recipe
+    Returns:
+        a dict mapping patch file path to a list of tuples of changed files and
+        change mode ('A' for add, 'D' for delete or 'M' for modify)
+    """
+    import oe.patch
+    patches = oe.patch.src_patches(d, expand=False)
+    patchedfiles = {}
+    for patch in patches:
+        _, _, patchfile, _, _, parm = bb.fetch.decodeurl(patch)
+        striplevel = int(parm['striplevel'])
+        patchedfiles[patchfile] = oe.patch.PatchSet.getPatchedFiles(patchfile, striplevel, os.path.join(d.getVar('S'), parm.get('patchdir', '')))
+    return patchedfiles
+
+
+def validate_pn(pn):
+    """Perform validation on a recipe name (PN) for a new recipe."""
+    reserved_names = ['forcevariable', 'append', 'prepend', 'remove']
+    if not re.match('^[0-9a-z-.+]+$', pn):
+        return 'Recipe name "%s" is invalid: only characters 0-9, a-z, -, + and . are allowed' % pn
+    elif pn in reserved_names:
+        return 'Recipe name "%s" is invalid: is a reserved keyword' % pn
+    elif pn.startswith('pn-'):
+        return 'Recipe name "%s" is invalid: names starting with "pn-" are reserved' % pn
+    elif pn.endswith(('.bb', '.bbappend', '.bbclass', '.inc', '.conf')):
+        return 'Recipe name "%s" is invalid: should be just a name, not a file name' % pn
+    return ''
+
+
+def get_bbfile_path(d, destdir, extrapathhint=None):
+    """
+    Determine the correct path for a recipe within a layer
+    Parameters:
+        d: Recipe-specific datastore
+        destdir: destination directory. Can be the path to the base of the layer or a
+            partial path somewhere within the layer.
+        extrapathhint: a path relative to the base of the layer to try
+    """
+    import bb.cookerdata
+
+    destdir = os.path.abspath(destdir)
+    destlayerdir = find_layerdir(destdir)
+
+    # Parse the specified layer's layer.conf file directly, in case the layer isn't in bblayers.conf
+    confdata = d.createCopy()
+    confdata.setVar('BBFILES', '')
+    confdata.setVar('LAYERDIR', destlayerdir)
+    destlayerconf = os.path.join(destlayerdir, "conf", "layer.conf")
+    confdata = bb.cookerdata.parse_config_file(destlayerconf, confdata)
+    pn = d.getVar('PN')
+
+    # Parse BBFILES_DYNAMIC and append to BBFILES
+    bbfiles_dynamic = (confdata.getVar('BBFILES_DYNAMIC') or "").split()
+    collections = (confdata.getVar('BBFILE_COLLECTIONS') or "").split()
+    invalid = []
+    for entry in bbfiles_dynamic:
+        parts = entry.split(":", 1)
+        if len(parts) != 2:
+            invalid.append(entry)
+            continue
+        l, f = parts
+        invert = l[0] == "!"
+        if invert:
+            l = l[1:]
+        if (l in collections and not invert) or (l not in collections and invert):
+            confdata.appendVar("BBFILES", " " + f)
+    if invalid:
+        return None
+    bbfilespecs = (confdata.getVar('BBFILES') or '').split()
+    if destdir == destlayerdir:
+        for bbfilespec in bbfilespecs:
+            if not bbfilespec.endswith('.bbappend'):
+                for match in glob.glob(bbfilespec):
+                    splitext = os.path.splitext(os.path.basename(match))
+                    if splitext[1] == '.bb':
+                        mpn = splitext[0].split('_')[0]
+                        if mpn == pn:
+                            return os.path.dirname(match)
+
+    # Try to make up a path that matches BBFILES
+    # this is a little crude, but better than nothing
+    bpn = d.getVar('BPN')
+    recipefn = os.path.basename(d.getVar('FILE'))
+    pathoptions = [destdir]
+    if extrapathhint:
+        pathoptions.append(os.path.join(destdir, extrapathhint))
+    if destdir == destlayerdir:
+        pathoptions.append(os.path.join(destdir, 'recipes-%s' % bpn, bpn))
+        pathoptions.append(os.path.join(destdir, 'recipes', bpn))
+        pathoptions.append(os.path.join(destdir, bpn))
+    elif not destdir.endswith(('/' + pn, '/' + bpn)):
+        pathoptions.append(os.path.join(destdir, bpn))
+    closepath = ''
+    for pathoption in pathoptions:
+        bbfilepath = os.path.join(pathoption, 'test.bb')
+        for bbfilespec in bbfilespecs:
+            if fnmatch.fnmatchcase(bbfilepath, bbfilespec):
+                return pathoption
+    return None
+
+def get_bbappend_path(d, destlayerdir, wildcardver=False):
+    """Determine how a bbappend for a recipe should be named and located within another layer"""
+
+    import bb.cookerdata
+
+    destlayerdir = os.path.abspath(destlayerdir)
+    recipefile = d.getVar('FILE')
+    recipefn = os.path.splitext(os.path.basename(recipefile))[0]
+    if wildcardver and '_' in recipefn:
+        recipefn = recipefn.split('_', 1)[0] + '_%'
+    appendfn = recipefn + '.bbappend'
+
+    # Parse the specified layer's layer.conf file directly, in case the layer isn't in bblayers.conf
+    confdata = d.createCopy()
+    confdata.setVar('BBFILES', '')
+    confdata.setVar('LAYERDIR', destlayerdir)
+    destlayerconf = os.path.join(destlayerdir, "conf", "layer.conf")
+    confdata = bb.cookerdata.parse_config_file(destlayerconf, confdata)
+
+    origlayerdir = find_layerdir(recipefile)
+    if not origlayerdir:
+        return (None, False)
+    # Now join this to the path where the bbappend is going and check if it is covered by BBFILES
+    appendpath = os.path.join(destlayerdir, os.path.relpath(os.path.dirname(recipefile), origlayerdir), appendfn)
+    closepath = ''
+    pathok = True
+    for bbfilespec in confdata.getVar('BBFILES').split():
+        if fnmatch.fnmatchcase(appendpath, bbfilespec):
+            # Our append path works, we're done
+            break
+        elif bbfilespec.startswith(destlayerdir) and fnmatch.fnmatchcase('test.bbappend', os.path.basename(bbfilespec)):
+            # Try to find the longest matching path
+            if len(bbfilespec) > len(closepath):
+                closepath = bbfilespec
+    else:
+        # Unfortunately the bbappend layer and the original recipe's layer don't have the same structure
+        if closepath:
+            # bbappend layer's layer.conf at least has a spec that picks up .bbappend files
+            # Now we just need to substitute out any wildcards
+            appendsubdir = os.path.relpath(os.path.dirname(closepath), destlayerdir)
+            if 'recipes-*' in appendsubdir:
+                # Try to copy this part from the original recipe path
+                res = re.search('/recipes-[^/]+/', recipefile)
+                if res:
+                    appendsubdir = appendsubdir.replace('/recipes-*/', res.group(0))
+            # This is crude, but we have to do something
+            appendsubdir = appendsubdir.replace('*', recipefn.split('_')[0])
+            appendsubdir = appendsubdir.replace('?', 'a')
+            appendpath = os.path.join(destlayerdir, appendsubdir, appendfn)
+        else:
+            pathok = False
+    return (appendpath, pathok)
+
+
+def bbappend_recipe(rd, destlayerdir, srcfiles, install=None, wildcardver=False, machine=None, extralines=None, removevalues=None, redirect_output=None, params=None, update_original_recipe=False):
+    """
+    Writes a bbappend file for a recipe
+    Parameters:
+        rd: data dictionary for the recipe
+        destlayerdir: base directory of the layer to place the bbappend in
+            (subdirectory path from there will be determined automatically)
+        srcfiles: dict of source files to add to SRC_URI, where the key
+            is the full path to the file to be added, and the value is a
+            dict with following optional keys:
+                path: the original filename as it would appear in SRC_URI
+                    or None if it isn't already present.
+                patchdir: the patchdir parameter
+                newname: the name to give to the new added file. None to use
+                    the default value: basename(path)
+            You may pass None for this parameter if you simply want to specify
+            your own content via the extralines parameter.
+        install: dict mapping entries in srcfiles to a tuple of two elements:
+            install path (*without* ${D} prefix) and permission value (as a
+            string, e.g. '0644').
+        wildcardver: True to use a % wildcard in the bbappend filename, or
+            False to make the bbappend specific to the recipe version.
+        machine:
+            If specified, make the changes in the bbappend specific to this
+            machine. This will also cause PACKAGE_ARCH = "${MACHINE_ARCH}"
+            to be added to the bbappend.
+        extralines:
+            Extra lines to add to the bbappend. This may be a dict of name
+            value pairs, or simply a list of the lines.
+        removevalues:
+            Variable values to remove - a dict of names/values.
+        redirect_output:
+            If specified, redirects writing the output file to the
+            specified directory (for dry-run purposes)
+        params:
+            Parameters to use when adding entries to SRC_URI. If specified,
+            should be a list of dicts with the same length as srcfiles.
+        update_original_recipe:
+            Force to update the original recipe instead of creating/updating
+            a bbapend. destlayerdir must contain the original recipe
+    """
+
+    if not removevalues:
+        removevalues = {}
+
+    recipefile = rd.getVar('FILE')
+    if update_original_recipe:
+        if destlayerdir not in recipefile:
+            bb.error("destlayerdir %s doesn't contain the original recipe (%s), cannot update it" % (destlayerdir, recipefile))
+            return (None, None)
+
+        appendpath = recipefile
+    else:
+        # Determine how the bbappend should be named
+        appendpath, pathok = get_bbappend_path(rd, destlayerdir, wildcardver)
+        if not appendpath:
+            bb.error('Unable to determine layer directory containing %s' % recipefile)
+            return (None, None)
+        if not pathok:
+            bb.warn('Unable to determine correct subdirectory path for bbappend file - check that what %s adds to BBFILES also matches .bbappend files. Using %s for now, but until you fix this the bbappend will not be applied.' % (os.path.join(destlayerdir, 'conf', 'layer.conf'), os.path.dirname(appendpath)))
+
+    appenddir = os.path.dirname(appendpath)
+    if not redirect_output:
+        bb.utils.mkdirhier(appenddir)
+
+    # FIXME check if the bbappend doesn't get overridden by a higher priority layer?
+
+    layerdirs = [os.path.abspath(layerdir) for layerdir in rd.getVar('BBLAYERS').split()]
+    if not os.path.abspath(destlayerdir) in layerdirs:
+        bb.warn('Specified layer is not currently enabled in bblayers.conf, you will need to add it before this bbappend will be active')
+
+    bbappendlines = []
+    if extralines:
+        if isinstance(extralines, dict):
+            for name, value in extralines.items():
+                bbappendlines.append((name, '=', value))
+        else:
+            # Do our best to split it
+            for line in extralines:
+                if line[-1] == '\n':
+                    line = line[:-1]
+                splitline = line.split(None, 2)
+                if len(splitline) == 3:
+                    bbappendlines.append(tuple(splitline))
+                else:
+                    raise Exception('Invalid extralines value passed')
+
+    def popline(varname):
+        for i in range(0, len(bbappendlines)):
+            if bbappendlines[i][0] == varname:
+                line = bbappendlines.pop(i)
+                return line
+        return None
+
+    def appendline(varname, op, value):
+        for i in range(0, len(bbappendlines)):
+            item = bbappendlines[i]
+            if item[0] == varname:
+                bbappendlines[i] = (item[0], item[1], item[2] + ' ' + value)
+                break
+        else:
+            bbappendlines.append((varname, op, value))
+
+    destsubdir = rd.getVar('PN')
+    if not update_original_recipe and srcfiles:
+        bbappendlines.append(('FILESEXTRAPATHS:prepend', ':=', '${THISDIR}/${PN}:'))
+
+    appendoverride = ''
+    if machine:
+        bbappendlines.append(('PACKAGE_ARCH', '=', '${MACHINE_ARCH}'))
+        appendoverride = ':%s' % machine
+    copyfiles = {}
+    if srcfiles:
+        instfunclines = []
+        for i, (newfile, param) in enumerate(srcfiles.items()):
+            srcurientry = None
+            if not 'path' in param or not param['path']:
+                if 'newname' in param and param['newname']:
+                    srcfile = param['newname']
+                else:
+                    srcfile = os.path.basename(newfile)
+                srcurientry = 'file://%s' % srcfile
+                oldentry = None
+                for uri in rd.getVar('SRC_URI').split():
+                    if srcurientry in uri:
+                        oldentry = uri
+                if params and params[i]:
+                    srcurientry = '%s;%s' % (srcurientry, ';'.join('%s=%s' % (k,v) for k,v in params[i].items()))
+                # Double-check it's not there already
+                # FIXME do we care if the entry is added by another bbappend that might go away?
+                if not srcurientry in rd.getVar('SRC_URI').split():
+                    if machine:
+                        if oldentry:
+                            appendline('SRC_URI:remove%s' % appendoverride, '=', ' ' + oldentry)
+                        appendline('SRC_URI:append%s' % appendoverride, '=', ' ' + srcurientry)
+                    else:
+                        if oldentry:
+                            if update_original_recipe:
+                                removevalues['SRC_URI'] = oldentry
+                            else:
+                                appendline('SRC_URI:remove', '=', oldentry)
+                        appendline('SRC_URI', '+=', srcurientry)
+                param['path'] = srcfile
+            else:
+                srcfile = param['path']
+            copyfiles[newfile] = param
+            if install:
+                institem = install.pop(newfile, None)
+                if institem:
+                    (destpath, perms) = institem
+                    instdestpath = replace_dir_vars(destpath, rd)
+                    instdirline = 'install -d ${D}%s' % os.path.dirname(instdestpath)
+                    if not instdirline in instfunclines:
+                        instfunclines.append(instdirline)
+                    instfunclines.append('install -m %s ${WORKDIR}/%s ${D}%s' % (perms, os.path.basename(srcfile), instdestpath))
+        if instfunclines:
+            bbappendlines.append(('do_install:append%s()' % appendoverride, '', instfunclines))
+
+    if redirect_output:
+        bb.note('Writing append file %s (dry-run)' % appendpath)
+        outfile = os.path.join(redirect_output, os.path.basename(appendpath))
+        # Only take a copy if the file isn't already there (this function may be called
+        # multiple times per operation when we're handling overrides)
+        if os.path.exists(appendpath) and not os.path.exists(outfile):
+            shutil.copy2(appendpath, outfile)
+    elif update_original_recipe:
+        outfile = recipefile
+    else:
+        bb.note('Writing append file %s' % appendpath)
+        outfile = appendpath
+
+    if os.path.exists(outfile):
+        # Work around lack of nonlocal in python 2
+        extvars = {'destsubdir': destsubdir}
+
+        def appendfile_varfunc(varname, origvalue, op, newlines):
+            if varname == 'FILESEXTRAPATHS:prepend':
+                if origvalue.startswith('${THISDIR}/'):
+                    popline('FILESEXTRAPATHS:prepend')
+                    extvars['destsubdir'] = rd.expand(origvalue.split('${THISDIR}/', 1)[1].rstrip(':'))
+            elif varname == 'PACKAGE_ARCH':
+                if machine:
+                    popline('PACKAGE_ARCH')
+                    return (machine, None, 4, False)
+            elif varname.startswith('do_install:append'):
+                func = popline(varname)
+                if func:
+                    instfunclines = [line.strip() for line in origvalue.strip('\n').splitlines()]
+                    for line in func[2]:
+                        if not line in instfunclines:
+                            instfunclines.append(line)
+                    return (instfunclines, None, 4, False)
+            else:
+                splitval = split_var_value(origvalue, assignment=False)
+                changed = False
+                removevar = varname
+                if varname in ['SRC_URI', 'SRC_URI:append%s' % appendoverride]:
+                    removevar = 'SRC_URI'
+                    line = popline(varname)
+                    if line:
+                        if line[2] not in splitval:
+                            splitval.append(line[2])
+                            changed = True
+                else:
+                    line = popline(varname)
+                    if line:
+                        splitval = [line[2]]
+                        changed = True
+
+                if removevar in removevalues:
+                    remove = removevalues[removevar]
+                    if isinstance(remove, str):
+                        if remove in splitval:
+                            splitval.remove(remove)
+                            changed = True
+                    else:
+                        for removeitem in remove:
+                            if removeitem in splitval:
+                                splitval.remove(removeitem)
+                                changed = True
+
+                if changed:
+                    newvalue = splitval
+                    if len(newvalue) == 1:
+                        # Ensure it's written out as one line
+                        if ':append' in varname:
+                            newvalue = ' ' + newvalue[0]
+                        else:
+                            newvalue = newvalue[0]
+                    if not newvalue and (op in ['+=', '.='] or ':append' in varname):
+                        # There's no point appending nothing
+                        newvalue = None
+                    if varname.endswith('()'):
+                        indent = 4
+                    else:
+                        indent = -1
+                    return (newvalue, None, indent, True)
+            return (origvalue, None, 4, False)
+
+        varnames = [item[0] for item in bbappendlines]
+        if removevalues:
+            varnames.extend(list(removevalues.keys()))
+
+        with open(outfile, 'r') as f:
+            (updated, newlines) = bb.utils.edit_metadata(f, varnames, appendfile_varfunc)
+
+        destsubdir = extvars['destsubdir']
+    else:
+        updated = False
+        newlines = []
+
+    if bbappendlines:
+        for line in bbappendlines:
+            if line[0].endswith('()'):
+                newlines.append('%s {\n    %s\n}\n' % (line[0], '\n    '.join(line[2])))
+            else:
+                newlines.append('%s %s "%s"\n\n' % line)
+        updated = True
+
+    if updated:
+        with open(outfile, 'w') as f:
+            f.writelines(newlines)
+
+    if copyfiles:
+        if machine:
+            destsubdir = os.path.join(destsubdir, machine)
+        if redirect_output:
+            outdir = redirect_output
+        else:
+            outdir = appenddir
+        for newfile, param in copyfiles.items():
+            srcfile = param['path']
+            patchdir = param.get('patchdir', ".")
+
+            if patchdir != ".":
+                newfile = os.path.join(os.path.split(newfile)[0], patchdir, os.path.split(newfile)[1])
+            filedest = os.path.join(outdir, destsubdir, os.path.basename(srcfile))
+            if os.path.abspath(newfile) != os.path.abspath(filedest):
+                if newfile.startswith(tempfile.gettempdir()):
+                    newfiledisp = os.path.basename(newfile)
+                else:
+                    newfiledisp = newfile
+                if redirect_output:
+                    bb.note('Copying %s to %s (dry-run)' % (newfiledisp, os.path.join(appenddir, destsubdir, os.path.basename(srcfile))))
+                else:
+                    bb.note('Copying %s to %s' % (newfiledisp, filedest))
+                bb.utils.mkdirhier(os.path.dirname(filedest))
+                shutil.copyfile(newfile, filedest)
+
+    return (appendpath, os.path.join(appenddir, destsubdir))
+
+
+def find_layerdir(fn):
+    """ Figure out the path to the base of the layer containing a file (e.g. a recipe)"""
+    pth = os.path.abspath(fn)
+    layerdir = ''
+    while pth:
+        if os.path.exists(os.path.join(pth, 'conf', 'layer.conf')):
+            layerdir = pth
+            break
+        pth = os.path.dirname(pth)
+        if pth == '/':
+            return None
+    return layerdir
+
+
+def replace_dir_vars(path, d):
+    """Replace common directory paths with appropriate variable references (e.g. /etc becomes ${sysconfdir})"""
+    dirvars = {}
+    # Sort by length so we get the variables we're interested in first
+    for var in sorted(list(d.keys()), key=len):
+        if var.endswith('dir') and var.lower() == var:
+            value = d.getVar(var)
+            if value.startswith('/') and not '\n' in value and value not in dirvars:
+                dirvars[value] = var
+    for dirpath in sorted(list(dirvars.keys()), reverse=True):
+        path = path.replace(dirpath, '${%s}' % dirvars[dirpath])
+    return path
+
+def get_recipe_pv_with_pfx_sfx(pv, uri_type):
+    """
+    Get PV separating prefix and suffix components.
+
+    Returns tuple with pv, prefix and suffix.
+    """
+    pfx = ''
+    sfx = ''
+
+    if uri_type == 'git':
+        git_regex = re.compile(r"(?P<pfx>v?)(?P<ver>.*?)(?P<sfx>\+[^\+]*(git)?r?(AUTOINC\+)?)(?P<rev>.*)")
+        m = git_regex.match(pv)
+
+        if m:
+            pv = m.group('ver')
+            pfx = m.group('pfx')
+            sfx = m.group('sfx')
+    else:
+        regex = re.compile(r"(?P<pfx>(v|r)?)(?P<ver>.*)")
+        m = regex.match(pv)
+        if m:
+            pv = m.group('ver')
+            pfx = m.group('pfx')
+
+    return (pv, pfx, sfx)
+
+def get_recipe_upstream_version(rd):
+    """
+        Get upstream version of recipe using bb.fetch2 methods with support for
+        http, https, ftp and git.
+
+        bb.fetch2 exceptions can be raised,
+            FetchError when don't have network access or upstream site don't response.
+            NoMethodError when uri latest_versionstring method isn't implemented.
+
+        Returns a dictonary with version, repository revision, current_version, type and datetime.
+        Type can be A for Automatic, M for Manual and U for Unknown.
+    """
+    from bb.fetch2 import decodeurl
+    from datetime import datetime
+
+    ru = {}
+    ru['current_version'] = rd.getVar('PV')
+    ru['version'] = ''
+    ru['type'] = 'U'
+    ru['datetime'] = ''
+    ru['revision'] = ''
+
+    # XXX: If don't have SRC_URI means that don't have upstream sources so
+    # returns the current recipe version, so that upstream version check
+    # declares a match.
+    src_uris = rd.getVar('SRC_URI')
+    if not src_uris:
+        ru['version'] = ru['current_version']
+        ru['type'] = 'M'
+        ru['datetime'] = datetime.now()
+        return ru
+
+    # XXX: we suppose that the first entry points to the upstream sources
+    src_uri = src_uris.split()[0]
+    uri_type, _, _, _, _, _ =  decodeurl(src_uri)
+
+    (pv, pfx, sfx) = get_recipe_pv_with_pfx_sfx(rd.getVar('PV'), uri_type)
+    ru['current_version'] = pv
+
+    manual_upstream_version = rd.getVar("RECIPE_UPSTREAM_VERSION")
+    if manual_upstream_version:
+        # manual tracking of upstream version.
+        ru['version'] = manual_upstream_version
+        ru['type'] = 'M'
+
+        manual_upstream_date = rd.getVar("CHECK_DATE")
+        if manual_upstream_date:
+            date = datetime.strptime(manual_upstream_date, "%b %d, %Y")
+        else:
+            date = datetime.now()
+        ru['datetime'] = date
+
+    elif uri_type == "file":
+        # files are always up-to-date
+        ru['version'] =  pv
+        ru['type'] = 'A'
+        ru['datetime'] = datetime.now()
+    else:
+        ud = bb.fetch2.FetchData(src_uri, rd)
+        if rd.getVar("UPSTREAM_CHECK_COMMITS") == "1":
+            bb.fetch2.get_srcrev(rd)
+            revision = ud.method.latest_revision(ud, rd, 'default')
+            upversion = pv
+            if revision != rd.getVar("SRCREV"):
+                upversion = upversion + "-new-commits-available"
+        else:
+            pupver = ud.method.latest_versionstring(ud, rd)
+            (upversion, revision) = pupver
+
+        if upversion:
+            ru['version'] = upversion
+            ru['type'] = 'A'
+
+        if revision:
+            ru['revision'] = revision
+
+        ru['datetime'] = datetime.now()
+
+    return ru
+
+def _get_recipe_upgrade_status(data):
+    uv = get_recipe_upstream_version(data)
+
+    pn = data.getVar('PN')
+    cur_ver = uv['current_version']
+
+    upstream_version_unknown = data.getVar('UPSTREAM_VERSION_UNKNOWN')
+    if not uv['version']:
+        status = "UNKNOWN" if upstream_version_unknown else "UNKNOWN_BROKEN"
+    else:
+        cmp = vercmp_string(uv['current_version'], uv['version'])
+        if cmp == -1:
+            status = "UPDATE" if not upstream_version_unknown else "KNOWN_BROKEN"
+        elif cmp == 0:
+            status = "MATCH" if not upstream_version_unknown else "KNOWN_BROKEN"
+        else:
+            status = "UNKNOWN" if upstream_version_unknown else "UNKNOWN_BROKEN"
+
+    next_ver = uv['version'] if uv['version'] else "N/A"
+    revision = uv['revision'] if uv['revision'] else "N/A"
+    maintainer = data.getVar('RECIPE_MAINTAINER')
+    no_upgrade_reason = data.getVar('RECIPE_NO_UPDATE_REASON')
+
+    return (pn, status, cur_ver, next_ver, maintainer, revision, no_upgrade_reason)
+
+def get_recipe_upgrade_status(recipes=None):
+    pkgs_list = []
+    data_copy_list = []
+    copy_vars = ('SRC_URI',
+                 'PV',
+                 'DL_DIR',
+                 'PN',
+                 'CACHE',
+                 'PERSISTENT_DIR',
+                 'BB_URI_HEADREVS',
+                 'UPSTREAM_CHECK_COMMITS',
+                 'UPSTREAM_CHECK_GITTAGREGEX',
+                 'UPSTREAM_CHECK_REGEX',
+                 'UPSTREAM_CHECK_URI',
+                 'UPSTREAM_VERSION_UNKNOWN',
+                 'RECIPE_MAINTAINER',
+                 'RECIPE_NO_UPDATE_REASON',
+                 'RECIPE_UPSTREAM_VERSION',
+                 'RECIPE_UPSTREAM_DATE',
+                 'CHECK_DATE',
+                 'FETCHCMD_bzr',
+                 'FETCHCMD_ccrc',
+                 'FETCHCMD_cvs',
+                 'FETCHCMD_git',
+                 'FETCHCMD_hg',
+                 'FETCHCMD_npm',
+                 'FETCHCMD_osc',
+                 'FETCHCMD_p4',
+                 'FETCHCMD_repo',
+                 'FETCHCMD_s3',
+                 'FETCHCMD_svn',
+                 'FETCHCMD_wget',
+            )
+
+    with bb.tinfoil.Tinfoil() as tinfoil:
+        tinfoil.prepare(config_only=False)
+
+        if not recipes:
+            recipes = tinfoil.all_recipe_files(variants=False)
+
+        for fn in recipes:
+            try:
+                if fn.startswith("/"):
+                    data = tinfoil.parse_recipe_file(fn)
+                else:
+                    data = tinfoil.parse_recipe(fn)
+            except bb.providers.NoProvider:
+                bb.note(" No provider for %s" % fn)
+                continue
+
+            unreliable = data.getVar('UPSTREAM_CHECK_UNRELIABLE')
+            if unreliable == "1":
+                bb.note(" Skip package %s as upstream check unreliable" % pn)
+                continue
+
+            data_copy = bb.data.init()
+            for var in copy_vars:
+                data_copy.setVar(var, data.getVar(var))
+            for k in data:
+                if k.startswith('SRCREV'):
+                    data_copy.setVar(k, data.getVar(k))
+
+            data_copy_list.append(data_copy)
+
+    from concurrent.futures import ProcessPoolExecutor
+    with ProcessPoolExecutor(max_workers=utils.cpu_count()) as executor:
+        pkgs_list = executor.map(_get_recipe_upgrade_status, data_copy_list)
+
+    return pkgs_list
diff --git a/meta-xilinx-core/lib/oe/reproducible.py b/meta-xilinx-core/lib/oe/reproducible.py
new file mode 100644
index 00000000..448befce
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/reproducible.py
@@ -0,0 +1,197 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+import os
+import subprocess
+import bb
+
+# For reproducible builds, this code sets the default SOURCE_DATE_EPOCH in each
+# component's build environment. The format is number of seconds since the
+# system epoch.
+#
+# Upstream components (generally) respect this environment variable,
+# using it in place of the "current" date and time.
+# See https://reproducible-builds.org/specs/source-date-epoch/
+#
+# The default value of SOURCE_DATE_EPOCH comes from the function
+# get_source_date_epoch_value which reads from the SDE_FILE, or if the file
+# is not available will use the fallback of SOURCE_DATE_EPOCH_FALLBACK.
+#
+# The SDE_FILE is normally constructed from the function
+# create_source_date_epoch_stamp which is typically added as a postfuncs to
+# the do_unpack task.  If a recipe does NOT have do_unpack, it should be added
+# to a task that runs after the source is available and before the
+# do_deploy_source_date_epoch task is executed.
+#
+# If a recipe wishes to override the default behavior it should set it's own
+# SOURCE_DATE_EPOCH or override the do_deploy_source_date_epoch_stamp task
+# with recipe-specific functionality to write the appropriate
+# SOURCE_DATE_EPOCH into the SDE_FILE.
+#
+# SOURCE_DATE_EPOCH is intended to be a reproducible value.  This value should
+# be reproducible for anyone who builds the same revision from the same
+# sources.
+#
+# There are 4 ways the create_source_date_epoch_stamp function determines what
+# becomes SOURCE_DATE_EPOCH:
+#
+# 1. Use the value from __source_date_epoch.txt file if this file exists.
+#    This file was most likely created in the previous build by one of the
+#    following methods 2,3,4.
+#    Alternatively, it can be provided by a recipe via SRC_URI.
+#
+# If the file does not exist:
+#
+# 2. If there is a git checkout, use the last git commit timestamp.
+#    Git does not preserve file timestamps on checkout.
+#
+# 3. Use the mtime of "known" files such as NEWS, CHANGLELOG, ...
+#    This works for well-kept repositories distributed via tarball.
+#
+# 4. Use the modification time of the youngest file in the source tree, if
+#    there is one.
+#    This will be the newest file from the distribution tarball, if any.
+#
+# 5. Fall back to a fixed timestamp (SOURCE_DATE_EPOCH_FALLBACK).
+#
+# Once the value is determined, it is stored in the recipe's SDE_FILE.
+
+def get_source_date_epoch_from_known_files(d, sourcedir):
+    source_date_epoch = None
+    newest_file = None
+    known_files = set(["NEWS", "ChangeLog", "Changelog", "CHANGES"])
+    for file in known_files:
+        filepath = os.path.join(sourcedir, file)
+        if os.path.isfile(filepath):
+            mtime = int(os.lstat(filepath).st_mtime)
+            # There may be more than one "known_file" present, if so, use the youngest one
+            if not source_date_epoch or mtime > source_date_epoch:
+                source_date_epoch = mtime
+                newest_file = filepath
+    if newest_file:
+        bb.debug(1, "SOURCE_DATE_EPOCH taken from: %s" % newest_file)
+    return source_date_epoch
+
+def find_git_folder(d, sourcedir):
+    # First guess: WORKDIR/git
+    # This is the default git fetcher unpack path
+    workdir = d.getVar('WORKDIR')
+    gitpath = os.path.join(workdir, "git/.git")
+    if os.path.isdir(gitpath):
+        return gitpath
+
+    # Second guess: ${S}
+    gitpath = os.path.join(sourcedir, ".git")
+    if os.path.isdir(gitpath):
+        return gitpath
+
+    # Perhaps there was a subpath or destsuffix specified.
+    # Go looking in the WORKDIR
+    exclude = set(["build", "image", "license-destdir", "patches", "pseudo",
+                   "recipe-sysroot", "recipe-sysroot-native", "sysroot-destdir", "temp"])
+    for root, dirs, files in os.walk(workdir, topdown=True):
+        dirs[:] = [d for d in dirs if d not in exclude]
+        if '.git' in dirs:
+            return os.path.join(root, ".git")
+
+    bb.warn("Failed to find a git repository in WORKDIR: %s" % workdir)
+    return None
+
+def get_source_date_epoch_from_git(d, sourcedir):
+    if not "git://" in d.getVar('SRC_URI') and not "gitsm://" in d.getVar('SRC_URI'):
+        return None
+
+    gitpath = find_git_folder(d, sourcedir)
+    if not gitpath:
+        return None
+
+    # Check that the repository has a valid HEAD; it may not if subdir is used
+    # in SRC_URI
+    p = subprocess.run(['git', '--git-dir', gitpath, 'rev-parse', 'HEAD'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+    if p.returncode != 0:
+        bb.debug(1, "%s does not have a valid HEAD: %s" % (gitpath, p.stdout.decode('utf-8')))
+        return None
+
+    bb.debug(1, "git repository: %s" % gitpath)
+    p = subprocess.run(['git', '-c', 'log.showSignature=false', '--git-dir', gitpath, 'log', '-1', '--pretty=%ct'],
+                       check=True, stdout=subprocess.PIPE)
+    return int(p.stdout.decode('utf-8'))
+
+def get_source_date_epoch_from_youngest_file(d, sourcedir):
+    if sourcedir == d.getVar('WORKDIR'):
+       # These sources are almost certainly not from a tarball
+       return None
+
+    # Do it the hard way: check all files and find the youngest one...
+    source_date_epoch = None
+    newest_file = None
+    for root, dirs, files in os.walk(sourcedir, topdown=True):
+        files = [f for f in files if not f[0] == '.']
+
+        for fname in files:
+            if fname == "singletask.lock":
+                 # Ignore externalsrc/devtool lockfile [YOCTO #14921]
+                 continue
+            filename = os.path.join(root, fname)
+            try:
+                mtime = int(os.lstat(filename).st_mtime)
+            except ValueError:
+                mtime = 0
+            if not source_date_epoch or mtime > source_date_epoch:
+                source_date_epoch = mtime
+                newest_file = filename
+
+    if newest_file:
+        bb.debug(1, "Newest file found: %s" % newest_file)
+    return source_date_epoch
+
+def fixed_source_date_epoch(d):
+    bb.debug(1, "No tarball or git repo found to determine SOURCE_DATE_EPOCH")
+    source_date_epoch = d.getVar('SOURCE_DATE_EPOCH_FALLBACK')
+    if source_date_epoch:
+        bb.debug(1, "Using SOURCE_DATE_EPOCH_FALLBACK")
+        return int(source_date_epoch)
+    return 0
+
+def get_source_date_epoch(d, sourcedir):
+    return (
+        get_source_date_epoch_from_git(d, sourcedir) or
+        get_source_date_epoch_from_youngest_file(d, sourcedir) or
+        fixed_source_date_epoch(d)       # Last resort
+    )
+
+def epochfile_read(epochfile, d):
+    cached, efile = d.getVar('__CACHED_SOURCE_DATE_EPOCH') or (None, None)
+    if cached and efile == epochfile:
+        return cached
+
+    if cached and epochfile != efile:
+        bb.debug(1, "Epoch file changed from %s to %s" % (efile, epochfile))
+
+    source_date_epoch = int(d.getVar('SOURCE_DATE_EPOCH_FALLBACK'))
+    try:
+        with open(epochfile, 'r') as f:
+            s = f.read()
+            try:
+                source_date_epoch = int(s)
+            except ValueError:
+                bb.warn("SOURCE_DATE_EPOCH value '%s' is invalid. Reverting to SOURCE_DATE_EPOCH_FALLBACK" % s)
+                source_date_epoch = int(d.getVar('SOURCE_DATE_EPOCH_FALLBACK'))
+        bb.debug(1, "SOURCE_DATE_EPOCH: %d" % source_date_epoch)
+    except FileNotFoundError:
+        bb.debug(1, "Cannot find %s. SOURCE_DATE_EPOCH will default to %d" % (epochfile, source_date_epoch))
+
+    d.setVar('__CACHED_SOURCE_DATE_EPOCH', (str(source_date_epoch), epochfile))
+    return str(source_date_epoch)
+
+def epochfile_write(source_date_epoch, epochfile, d):
+
+    bb.debug(1, "SOURCE_DATE_EPOCH: %d" % source_date_epoch)
+    bb.utils.mkdirhier(os.path.dirname(epochfile))
+
+    tmp_file = "%s.new" % epochfile
+    with open(tmp_file, 'w') as f:
+        f.write(str(source_date_epoch))
+    os.rename(tmp_file, epochfile)
diff --git a/meta-xilinx-core/lib/oe/rootfs.py b/meta-xilinx-core/lib/oe/rootfs.py
new file mode 100644
index 00000000..5abce4ad
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/rootfs.py
@@ -0,0 +1,438 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+from abc import ABCMeta, abstractmethod
+from oe.utils import execute_pre_post_process
+from oe.package_manager import *
+from oe.manifest import *
+import oe.path
+import shutil
+import os
+import subprocess
+import re
+
+class Rootfs(object, metaclass=ABCMeta):
+    """
+    This is an abstract class. Do not instantiate this directly.
+    """
+
+    def __init__(self, d, progress_reporter=None, logcatcher=None):
+        self.d = d
+        self.pm = None
+        self.image_rootfs = self.d.getVar('IMAGE_ROOTFS')
+        self.deploydir = self.d.getVar('IMGDEPLOYDIR')
+        self.progress_reporter = progress_reporter
+        self.logcatcher = logcatcher
+
+        self.install_order = Manifest.INSTALL_ORDER
+
+    @abstractmethod
+    def _create(self):
+        pass
+
+    @abstractmethod
+    def _get_delayed_postinsts(self):
+        pass
+
+    @abstractmethod
+    def _save_postinsts(self):
+        pass
+
+    @abstractmethod
+    def _log_check(self):
+        pass
+
+    def _log_check_common(self, type, match):
+        # Ignore any lines containing log_check to avoid recursion, and ignore
+        # lines beginning with a + since sh -x may emit code which isn't
+        # actually executed, but may contain error messages
+        excludes = [ 'log_check', r'^\+' ]
+        if hasattr(self, 'log_check_expected_regexes'):
+            excludes.extend(self.log_check_expected_regexes)
+        # Insert custom log_check excludes
+        excludes += [x for x in (self.d.getVar("IMAGE_LOG_CHECK_EXCLUDES") or "").split(" ") if x]
+        excludes = [re.compile(x) for x in excludes]
+        r = re.compile(match)
+        log_path = self.d.expand("${T}/log.do_rootfs")
+        messages = []
+        with open(log_path, 'r') as log:
+            for line in log:
+                if self.logcatcher and self.logcatcher.contains(line.rstrip()):
+                    continue
+                for ee in excludes:
+                    m = ee.search(line)
+                    if m:
+                        break
+                if m:
+                    continue
+
+                m = r.search(line)
+                if m:
+                    messages.append('[log_check] %s' % line)
+        if messages:
+            if len(messages) == 1:
+                msg = '1 %s message' % type
+            else:
+                msg = '%d %s messages' % (len(messages), type)
+            msg = '[log_check] %s: found %s in the logfile:\n%s' % \
+                (self.d.getVar('PN'), msg, ''.join(messages))
+            if type == 'error':
+                bb.fatal(msg)
+            else:
+                bb.warn(msg)
+
+    def _log_check_warn(self):
+        self._log_check_common('warning', '^(warn|Warn|WARNING:)')
+
+    def _log_check_error(self):
+        self._log_check_common('error', self.log_check_regex)
+
+    def _insert_feed_uris(self):
+        if bb.utils.contains("IMAGE_FEATURES", "package-management",
+                         True, False, self.d):
+            self.pm.insert_feeds_uris(self.d.getVar('PACKAGE_FEED_URIS') or "",
+                self.d.getVar('PACKAGE_FEED_BASE_PATHS') or "",
+                self.d.getVar('PACKAGE_FEED_ARCHS'))
+
+
+    """
+    The _cleanup() method should be used to clean-up stuff that we don't really
+    want to end up on target. For example, in the case of RPM, the DB locks.
+    The method is called, once, at the end of create() method.
+    """
+    @abstractmethod
+    def _cleanup(self):
+        pass
+
+    def _setup_dbg_rootfs(self, package_paths):
+        gen_debugfs = self.d.getVar('IMAGE_GEN_DEBUGFS') or '0'
+        if gen_debugfs != '1':
+           return
+
+        bb.note("  Renaming the original rootfs...")
+        try:
+            shutil.rmtree(self.image_rootfs + '-orig')
+        except:
+            pass
+        bb.utils.rename(self.image_rootfs, self.image_rootfs + '-orig')
+
+        bb.note("  Creating debug rootfs...")
+        bb.utils.mkdirhier(self.image_rootfs)
+
+        bb.note("  Copying back package database...")
+        for path in package_paths:
+            bb.utils.mkdirhier(self.image_rootfs + os.path.dirname(path))
+            if os.path.isdir(self.image_rootfs + '-orig' + path):
+                shutil.copytree(self.image_rootfs + '-orig' + path, self.image_rootfs + path, symlinks=True)
+            elif os.path.isfile(self.image_rootfs + '-orig' + path):
+                shutil.copyfile(self.image_rootfs + '-orig' + path, self.image_rootfs + path)
+
+        # Copy files located in /usr/lib/debug or /usr/src/debug
+        for dir in ["/usr/lib/debug", "/usr/src/debug"]:
+            src = self.image_rootfs + '-orig' + dir
+            if os.path.exists(src):
+                dst = self.image_rootfs + dir
+                bb.utils.mkdirhier(os.path.dirname(dst))
+                shutil.copytree(src, dst)
+
+        # Copy files with suffix '.debug' or located in '.debug' dir.
+        for root, dirs, files in os.walk(self.image_rootfs + '-orig'):
+            relative_dir = root[len(self.image_rootfs + '-orig'):]
+            for f in files:
+                if f.endswith('.debug') or '/.debug' in relative_dir:
+                    bb.utils.mkdirhier(self.image_rootfs + relative_dir)
+                    shutil.copy(os.path.join(root, f),
+                                self.image_rootfs + relative_dir)
+
+        bb.note("  Install complementary '*-dbg' packages...")
+        self.pm.install_complementary('*-dbg')
+
+        if self.d.getVar('PACKAGE_DEBUG_SPLIT_STYLE') == 'debug-with-srcpkg':
+            bb.note("  Install complementary '*-src' packages...")
+            self.pm.install_complementary('*-src')
+
+        """
+        Install additional debug packages. Possibility to install additional packages,
+        which are not automatically installed as complementary package of
+        standard one, e.g. debug package of static libraries.
+        """
+        extra_debug_pkgs = self.d.getVar('IMAGE_INSTALL_DEBUGFS')
+        if extra_debug_pkgs:
+            bb.note("  Install extra debug packages...")
+            self.pm.install(extra_debug_pkgs.split(), True)
+
+        bb.note("  Removing package database...")
+        for path in package_paths:
+            if os.path.isdir(self.image_rootfs + path):
+                shutil.rmtree(self.image_rootfs + path)
+            elif os.path.isfile(self.image_rootfs + path):
+                os.remove(self.image_rootfs + path)
+
+        bb.note("  Rename debug rootfs...")
+        try:
+            shutil.rmtree(self.image_rootfs + '-dbg')
+        except:
+            pass
+        bb.utils.rename(self.image_rootfs, self.image_rootfs + '-dbg')
+
+        bb.note("  Restoring original rootfs...")
+        bb.utils.rename(self.image_rootfs + '-orig', self.image_rootfs)
+
+    def _exec_shell_cmd(self, cmd):
+        try:
+            subprocess.check_output(cmd, stderr=subprocess.STDOUT)
+        except subprocess.CalledProcessError as e:
+            return("Command '%s' returned %d:\n%s" % (e.cmd, e.returncode, e.output))
+
+        return None
+
+    def create(self):
+        bb.note("###### Generate rootfs #######")
+        pre_process_cmds = self.d.getVar("ROOTFS_PREPROCESS_COMMAND")
+        post_process_cmds = self.d.getVar("ROOTFS_POSTPROCESS_COMMAND")
+        rootfs_post_install_cmds = self.d.getVar('ROOTFS_POSTINSTALL_COMMAND')
+
+        def make_last(command, commands):
+            commands = commands.split()
+            if command in commands:
+                commands.remove(command)
+                commands.append(command)
+            return "".join(commands)
+
+        # We want this to run as late as possible, in particular after
+        # systemd_sysusers_create and set_user_group. Using :append is not enough
+        make_last("tidy_shadowutils_files", post_process_cmds)
+        make_last("rootfs_reproducible", post_process_cmds)
+
+        execute_pre_post_process(self.d, pre_process_cmds)
+
+        if self.progress_reporter:
+            self.progress_reporter.next_stage()
+
+        # call the package manager dependent create method
+        self._create()
+
+        sysconfdir = self.image_rootfs + self.d.getVar('sysconfdir')
+        bb.utils.mkdirhier(sysconfdir)
+        with open(sysconfdir + "/version", "w+") as ver:
+            ver.write(self.d.getVar('BUILDNAME') + "\n")
+
+        execute_pre_post_process(self.d, rootfs_post_install_cmds)
+
+        self.pm.run_intercepts()
+
+        execute_pre_post_process(self.d, post_process_cmds)
+
+        if self.progress_reporter:
+            self.progress_reporter.next_stage()
+
+        if bb.utils.contains("IMAGE_FEATURES", "read-only-rootfs",
+                         True, False, self.d) and \
+           not bb.utils.contains("IMAGE_FEATURES",
+                         "read-only-rootfs-delayed-postinsts",
+                         True, False, self.d):
+            delayed_postinsts = self._get_delayed_postinsts()
+            if delayed_postinsts is not None:
+                bb.fatal("The following packages could not be configured "
+                         "offline and rootfs is read-only: %s" %
+                         delayed_postinsts)
+
+        if self.d.getVar('USE_DEVFS') != "1":
+            self._create_devfs()
+
+        self._uninstall_unneeded()
+
+        if self.progress_reporter:
+            self.progress_reporter.next_stage()
+
+        self._insert_feed_uris()
+
+        self._run_ldconfig()
+
+        if self.d.getVar('USE_DEPMOD') != "0":
+            self._generate_kernel_module_deps()
+
+        self._cleanup()
+        self._log_check()
+
+        if self.progress_reporter:
+            self.progress_reporter.next_stage()
+
+
+    def _uninstall_unneeded(self):
+        # Remove the run-postinsts package if no delayed postinsts are found
+        delayed_postinsts = self._get_delayed_postinsts()
+        if delayed_postinsts is None:
+            if os.path.exists(self.d.expand("${IMAGE_ROOTFS}${sysconfdir}/init.d/run-postinsts")) or os.path.exists(self.d.expand("${IMAGE_ROOTFS}${systemd_system_unitdir}/run-postinsts.service")):
+                self.pm.remove(["run-postinsts"])
+
+        image_rorfs = bb.utils.contains("IMAGE_FEATURES", "read-only-rootfs",
+                                        True, False, self.d) and \
+                      not bb.utils.contains("IMAGE_FEATURES",
+                                        "read-only-rootfs-delayed-postinsts",
+                                        True, False, self.d)
+
+        image_rorfs_force = self.d.getVar('FORCE_RO_REMOVE')
+
+        if image_rorfs or image_rorfs_force == "1":
+            # Remove components that we don't need if it's a read-only rootfs
+            unneeded_pkgs = self.d.getVar("ROOTFS_RO_UNNEEDED").split()
+            pkgs_installed = image_list_installed_packages(self.d)
+            # Make sure update-alternatives is removed last. This is
+            # because its database has to available while uninstalling
+            # other packages, allowing alternative symlinks of packages
+            # to be uninstalled or to be managed correctly otherwise.
+            provider = self.d.getVar("VIRTUAL-RUNTIME_update-alternatives")
+            pkgs_to_remove = sorted([pkg for pkg in pkgs_installed if pkg in unneeded_pkgs], key=lambda x: x == provider)
+
+            # update-alternatives provider is removed in its own remove()
+            # call because all package managers do not guarantee the packages
+            # are removed in the order they given in the list (which is
+            # passed to the command line). The sorting done earlier is
+            # utilized to implement the 2-stage removal.
+            if len(pkgs_to_remove) > 1:
+                self.pm.remove(pkgs_to_remove[:-1], False)
+            if len(pkgs_to_remove) > 0:
+                self.pm.remove([pkgs_to_remove[-1]], False)
+
+        if delayed_postinsts:
+            self._save_postinsts()
+            if image_rorfs:
+                bb.warn("There are post install scripts "
+                        "in a read-only rootfs")
+
+        post_uninstall_cmds = self.d.getVar("ROOTFS_POSTUNINSTALL_COMMAND")
+        execute_pre_post_process(self.d, post_uninstall_cmds)
+
+        runtime_pkgmanage = bb.utils.contains("IMAGE_FEATURES", "package-management",
+                                              True, False, self.d)
+        if not runtime_pkgmanage:
+            # Remove the package manager data files
+            self.pm.remove_packaging_data()
+
+    def _run_ldconfig(self):
+        if self.d.getVar('LDCONFIGDEPEND'):
+            bb.note("Executing: ldconfig -r " + self.image_rootfs + " -c new -v -X")
+            self._exec_shell_cmd(['ldconfig', '-r', self.image_rootfs, '-c',
+                                  'new', '-v', '-X'])
+
+        image_rorfs = bb.utils.contains("IMAGE_FEATURES", "read-only-rootfs",
+                                        True, False, self.d)
+        ldconfig_in_features = bb.utils.contains("DISTRO_FEATURES", "ldconfig",
+                                                 True, False, self.d)
+        if image_rorfs or not ldconfig_in_features:
+            ldconfig_cache_dir = os.path.join(self.image_rootfs, "var/cache/ldconfig")
+            if os.path.exists(ldconfig_cache_dir):
+                bb.note("Removing ldconfig auxiliary cache...")
+                shutil.rmtree(ldconfig_cache_dir)
+
+    def _check_for_kernel_modules(self, modules_dir):
+        for root, dirs, files in os.walk(modules_dir, topdown=True):
+            for name in files:
+                found_ko = name.endswith((".ko", ".ko.gz", ".ko.xz", ".ko.zst"))
+                if found_ko:
+                    return found_ko
+        return False
+
+    def _generate_kernel_module_deps(self):
+        modules_dir = os.path.join(self.image_rootfs, 'lib', 'modules')
+        # if we don't have any modules don't bother to do the depmod
+        if not self._check_for_kernel_modules(modules_dir):
+            bb.note("No Kernel Modules found, not running depmod")
+            return
+
+        pkgdatadir = self.d.getVar('PKGDATA_DIR')
+
+        # PKGDATA_DIR can include multiple kernels so we run depmod for each
+        # one of them.
+        for direntry in os.listdir(pkgdatadir):
+            match = re.match('(.*)-depmod', direntry)
+            if not match:
+                continue
+            kernel_package_name = match.group(1)
+
+            kernel_abi_ver_file = oe.path.join(pkgdatadir, direntry, kernel_package_name + '-abiversion')
+            if not os.path.exists(kernel_abi_ver_file):
+                bb.fatal("No kernel-abiversion file found (%s), cannot run depmod, aborting" % kernel_abi_ver_file)
+
+            with open(kernel_abi_ver_file) as f:
+                kernel_ver = f.read().strip(' \n')
+
+            versioned_modules_dir = os.path.join(self.image_rootfs, modules_dir, kernel_ver)
+
+            bb.utils.mkdirhier(versioned_modules_dir)
+
+            bb.note("Running depmodwrapper for %s ..." % versioned_modules_dir)
+            if self._exec_shell_cmd(['depmodwrapper', '-a', '-b', self.image_rootfs, kernel_ver, kernel_package_name]):
+                bb.fatal("Kernel modules dependency generation failed")
+
+    """
+    Create devfs:
+    * IMAGE_DEVICE_TABLE is the old name to an absolute path to a device table file
+    * IMAGE_DEVICE_TABLES is a new name for a file, or list of files, seached
+      for in the BBPATH
+    If neither are specified then the default name of files/device_table-minimal.txt
+    is searched for in the BBPATH (same as the old version.)
+    """
+    def _create_devfs(self):
+        devtable_list = []
+        devtable = self.d.getVar('IMAGE_DEVICE_TABLE')
+        if devtable is not None:
+            devtable_list.append(devtable)
+        else:
+            devtables = self.d.getVar('IMAGE_DEVICE_TABLES')
+            if devtables is None:
+                devtables = 'files/device_table-minimal.txt'
+            for devtable in devtables.split():
+                devtable_list.append("%s" % bb.utils.which(self.d.getVar('BBPATH'), devtable))
+
+        for devtable in devtable_list:
+            self._exec_shell_cmd(["makedevs", "-r",
+                                  self.image_rootfs, "-D", devtable])
+
+
+def get_class_for_type(imgtype):
+    import importlib
+    mod = importlib.import_module('oe.package_manager.' + imgtype + '.rootfs')
+    return mod.PkgRootfs
+
+def variable_depends(d, manifest_dir=None):
+    img_type = d.getVar('IMAGE_PKGTYPE')
+    cls = get_class_for_type(img_type)
+    return cls._depends_list()
+
+def create_rootfs(d, manifest_dir=None, progress_reporter=None, logcatcher=None):
+    env_bkp = os.environ.copy()
+
+    img_type = d.getVar('IMAGE_PKGTYPE')
+
+    cls = get_class_for_type(img_type)
+    cls(d, manifest_dir, progress_reporter, logcatcher).create()
+    os.environ.clear()
+    os.environ.update(env_bkp)
+
+
+def image_list_installed_packages(d, rootfs_dir=None):
+    # Theres no rootfs for baremetal images
+    if bb.data.inherits_class('baremetal-image', d):
+        return ""
+
+    if not rootfs_dir:
+        rootfs_dir = d.getVar('IMAGE_ROOTFS')
+
+    img_type = d.getVar('IMAGE_PKGTYPE')
+
+    import importlib
+    cls = importlib.import_module('oe.package_manager.' + img_type)
+    return cls.PMPkgsList(d, rootfs_dir).list_pkgs()
+
+if __name__ == "__main__":
+    """
+    We should be able to run this as a standalone script, from outside bitbake
+    environment.
+    """
+    """
+    TBD
+    """
diff --git a/meta-xilinx-core/lib/oe/rust.py b/meta-xilinx-core/lib/oe/rust.py
new file mode 100644
index 00000000..185553ee
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/rust.py
@@ -0,0 +1,13 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: MIT
+#
+
+# Handle mismatches between `uname -m`-style output and Rust's arch names
+def arch_to_rust_arch(arch):
+    if arch == "ppc64le":
+        return "powerpc64le"
+    if arch in ('riscv32', 'riscv64'):
+        return arch + 'gc'
+    return arch
diff --git a/meta-xilinx-core/lib/oe/sbom.py b/meta-xilinx-core/lib/oe/sbom.py
new file mode 100644
index 00000000..fd4b6895
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/sbom.py
@@ -0,0 +1,120 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import collections
+
+DepRecipe = collections.namedtuple("DepRecipe", ("doc", "doc_sha1", "recipe"))
+DepSource = collections.namedtuple("DepSource", ("doc", "doc_sha1", "recipe", "file"))
+
+
+def get_recipe_spdxid(d):
+    return "SPDXRef-%s-%s" % ("Recipe", d.getVar("PN"))
+
+
+def get_download_spdxid(d, idx):
+    return "SPDXRef-Download-%s-%d" % (d.getVar("PN"), idx)
+
+
+def get_package_spdxid(pkg):
+    return "SPDXRef-Package-%s" % pkg
+
+
+def get_source_file_spdxid(d, idx):
+    return "SPDXRef-SourceFile-%s-%d" % (d.getVar("PN"), idx)
+
+
+def get_packaged_file_spdxid(pkg, idx):
+    return "SPDXRef-PackagedFile-%s-%d" % (pkg, idx)
+
+
+def get_image_spdxid(img):
+    return "SPDXRef-Image-%s" % img
+
+
+def get_sdk_spdxid(sdk):
+    return "SPDXRef-SDK-%s" % sdk
+
+
+def _doc_path_by_namespace(spdx_deploy, arch, doc_namespace):
+    return spdx_deploy / "by-namespace" / arch / doc_namespace.replace("/", "_")
+
+
+def doc_find_by_namespace(spdx_deploy, search_arches, doc_namespace):
+    for pkgarch in search_arches:
+        p = _doc_path_by_namespace(spdx_deploy, pkgarch, doc_namespace)
+        if os.path.exists(p):
+            return p
+    return None
+
+
+def _doc_path_by_hashfn(spdx_deploy, arch, doc_name, hashfn):
+    return (
+        spdx_deploy / "by-hash" / arch / hashfn.split()[1] / (doc_name + ".spdx.json")
+    )
+
+
+def doc_find_by_hashfn(spdx_deploy, search_arches, doc_name, hashfn):
+    for pkgarch in search_arches:
+        p = _doc_path_by_hashfn(spdx_deploy, pkgarch, doc_name, hashfn)
+        if os.path.exists(p):
+            return p
+    return None
+
+
+def doc_path(spdx_deploy, doc_name, arch, subdir):
+    return spdx_deploy / arch / subdir / (doc_name + ".spdx.json")
+
+
+def write_doc(d, spdx_doc, arch, subdir, spdx_deploy=None, indent=None):
+    from pathlib import Path
+
+    if spdx_deploy is None:
+        spdx_deploy = Path(d.getVar("SPDXDEPLOY"))
+
+    dest = doc_path(spdx_deploy, spdx_doc.name, arch, subdir)
+    dest.parent.mkdir(exist_ok=True, parents=True)
+    with dest.open("wb") as f:
+        doc_sha1 = spdx_doc.to_json(f, sort_keys=True, indent=indent)
+
+    l = _doc_path_by_namespace(spdx_deploy, arch, spdx_doc.documentNamespace)
+    l.parent.mkdir(exist_ok=True, parents=True)
+    l.symlink_to(os.path.relpath(dest, l.parent))
+
+    l = _doc_path_by_hashfn(
+        spdx_deploy, arch, spdx_doc.name, d.getVar("BB_HASHFILENAME")
+    )
+    l.parent.mkdir(exist_ok=True, parents=True)
+    l.symlink_to(os.path.relpath(dest, l.parent))
+
+    return doc_sha1
+
+
+def read_doc(fn):
+    import hashlib
+    import oe.spdx
+    import io
+    import contextlib
+
+    @contextlib.contextmanager
+    def get_file():
+        if isinstance(fn, io.IOBase):
+            yield fn
+        else:
+            with fn.open("rb") as f:
+                yield f
+
+    with get_file() as f:
+        sha1 = hashlib.sha1()
+        while True:
+            chunk = f.read(4096)
+            if not chunk:
+                break
+            sha1.update(chunk)
+
+        f.seek(0)
+        doc = oe.spdx.SPDXDocument.from_json(f)
+
+    return (doc, sha1.hexdigest())
diff --git a/meta-xilinx-core/lib/oe/sdk.py b/meta-xilinx-core/lib/oe/sdk.py
new file mode 100644
index 00000000..3dc36722
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/sdk.py
@@ -0,0 +1,160 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+from abc import ABCMeta, abstractmethod
+from oe.utils import execute_pre_post_process
+from oe.manifest import *
+from oe.package_manager import *
+import os
+import traceback
+
+class Sdk(object, metaclass=ABCMeta):
+    def __init__(self, d, manifest_dir):
+        self.d = d
+        self.sdk_output = self.d.getVar('SDK_OUTPUT')
+        self.sdk_native_path = self.d.getVar('SDKPATHNATIVE').strip('/')
+        self.target_path = self.d.getVar('SDKTARGETSYSROOT').strip('/')
+        self.sysconfdir = self.d.getVar('sysconfdir').strip('/')
+
+        self.sdk_target_sysroot = os.path.join(self.sdk_output, self.target_path)
+        self.sdk_host_sysroot = self.sdk_output
+
+        if manifest_dir is None:
+            self.manifest_dir = self.d.getVar("SDK_DIR")
+        else:
+            self.manifest_dir = manifest_dir
+
+        self.remove(self.sdk_output, True)
+
+        self.install_order = Manifest.INSTALL_ORDER
+
+    @abstractmethod
+    def _populate(self):
+        pass
+
+    def populate(self):
+        self.mkdirhier(self.sdk_output)
+
+        # call backend dependent implementation
+        self._populate()
+
+        # Don't ship any libGL in the SDK
+        self.remove(os.path.join(self.sdk_output, self.sdk_native_path,
+                         self.d.getVar('libdir_nativesdk').strip('/'),
+                         "libGL*"))
+
+        # Fix or remove broken .la files
+        self.remove(os.path.join(self.sdk_output, self.sdk_native_path,
+                         self.d.getVar('libdir_nativesdk').strip('/'),
+                         "*.la"))
+
+        # Link the ld.so.cache file into the hosts filesystem
+        link_name = os.path.join(self.sdk_output, self.sdk_native_path,
+                                 self.sysconfdir, "ld.so.cache")
+        self.mkdirhier(os.path.dirname(link_name))
+        os.symlink("/etc/ld.so.cache", link_name)
+
+        execute_pre_post_process(self.d, self.d.getVar('SDK_POSTPROCESS_COMMAND'))
+
+    def movefile(self, sourcefile, destdir):
+        try:
+            # FIXME: this check of movefile's return code to None should be
+            # fixed within the function to use only exceptions to signal when
+            # something goes wrong
+            if (bb.utils.movefile(sourcefile, destdir) == None):
+                raise OSError("moving %s to %s failed"
+                        %(sourcefile, destdir))
+        #FIXME: using umbrella exc catching because bb.utils method raises it
+        except Exception as e:
+            bb.debug(1, "printing the stack trace\n %s" %traceback.format_exc())
+            bb.fatal("unable to place %s in final SDK location" % sourcefile)
+
+    def mkdirhier(self, dirpath):
+        try:
+            bb.utils.mkdirhier(dirpath)
+        except OSError as e:
+            bb.debug(1, "printing the stack trace\n %s" %traceback.format_exc())
+            bb.fatal("cannot make dir for SDK: %s" % dirpath)
+
+    def remove(self, path, recurse=False):
+        try:
+            bb.utils.remove(path, recurse)
+        #FIXME: using umbrella exc catching because bb.utils method raises it
+        except Exception as e:
+            bb.debug(1, "printing the stack trace\n %s" %traceback.format_exc())
+            bb.warn("cannot remove SDK dir: %s" % path)
+
+    def install_locales(self, pm):
+        linguas = self.d.getVar("SDKIMAGE_LINGUAS")
+        if linguas:
+            import fnmatch
+            # Install the binary locales
+            if linguas == "all":
+                pm.install_glob("nativesdk-glibc-binary-localedata-*.utf-8", sdk=True)
+            else:
+                pm.install(["nativesdk-glibc-binary-localedata-%s.utf-8" % \
+                           lang for lang in linguas.split()])
+            # Generate a locale archive of them
+            target_arch = self.d.getVar('SDK_ARCH')
+            rootfs = oe.path.join(self.sdk_host_sysroot, self.sdk_native_path)
+            localedir = oe.path.join(rootfs, self.d.getVar("libdir_nativesdk"), "locale")
+            generate_locale_archive(self.d, rootfs, target_arch, localedir)
+            # And now delete the binary locales
+            pkgs = fnmatch.filter(pm.list_installed(), "nativesdk-glibc-binary-localedata-*.utf-8")
+            pm.remove(pkgs)
+        else:
+            # No linguas so do nothing
+            pass
+
+
+def sdk_list_installed_packages(d, target, rootfs_dir=None):
+    if rootfs_dir is None:
+        sdk_output = d.getVar('SDK_OUTPUT')
+        target_path = d.getVar('SDKTARGETSYSROOT').strip('/')
+
+        rootfs_dir = [sdk_output, os.path.join(sdk_output, target_path)][target is True]
+
+    if target is False:
+        ipkgconf_sdk_target = d.getVar("IPKGCONF_SDK")
+        d.setVar("IPKGCONF_TARGET", ipkgconf_sdk_target)
+
+    img_type = d.getVar('IMAGE_PKGTYPE')
+    import importlib
+    cls = importlib.import_module('oe.package_manager.' + img_type)
+    return cls.PMPkgsList(d, rootfs_dir).list_pkgs()
+
+def populate_sdk(d, manifest_dir=None):
+    env_bkp = os.environ.copy()
+
+    img_type = d.getVar('IMAGE_PKGTYPE')
+    import importlib
+    cls = importlib.import_module('oe.package_manager.' + img_type + '.sdk')
+    cls.PkgSdk(d, manifest_dir).populate()
+
+    os.environ.clear()
+    os.environ.update(env_bkp)
+
+def get_extra_sdkinfo(sstate_dir):
+    """
+    This function is going to be used for generating the target and host manifest files packages of eSDK.
+    """
+    import math
+    
+    extra_info = {}
+    extra_info['tasksizes'] = {}
+    extra_info['filesizes'] = {}
+    for root, _, files in os.walk(sstate_dir):
+        for fn in files:
+            if fn.endswith('.tgz'):
+                fsize = int(math.ceil(float(os.path.getsize(os.path.join(root, fn))) / 1024))
+                task = fn.rsplit(':',1)[1].split('_',1)[1].split(',')[0]
+                origtotal = extra_info['tasksizes'].get(task, 0)
+                extra_info['tasksizes'][task] = origtotal + fsize
+                extra_info['filesizes'][fn] = fsize
+    return extra_info
+
+if __name__ == "__main__":
+    pass
diff --git a/meta-xilinx-core/lib/oe/spdx.py b/meta-xilinx-core/lib/oe/spdx.py
new file mode 100644
index 00000000..7aaf2af5
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/spdx.py
@@ -0,0 +1,357 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+#
+# This library is intended to capture the JSON SPDX specification in a type
+# safe manner. It is not intended to encode any particular OE specific
+# behaviors, see the sbom.py for that.
+#
+# The documented SPDX spec document doesn't cover the JSON syntax for
+# particular configuration, which can make it hard to determine what the JSON
+# syntax should be. I've found it is actually much simpler to read the official
+# SPDX JSON schema which can be found here: https://github.com/spdx/spdx-spec
+# in schemas/spdx-schema.json
+#
+
+import hashlib
+import itertools
+import json
+
+SPDX_VERSION = "2.2"
+
+
+#
+# The following are the support classes that are used to implement SPDX object
+#
+
+class _Property(object):
+    """
+    A generic SPDX object property. The different types will derive from this
+    class
+    """
+
+    def __init__(self, *, default=None):
+        self.default = default
+
+    def setdefault(self, dest, name):
+        if self.default is not None:
+            dest.setdefault(name, self.default)
+
+
+class _String(_Property):
+    """
+    A scalar string property for an SPDX object
+    """
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+    def set_property(self, attrs, name):
+        def get_helper(obj):
+            return obj._spdx[name]
+
+        def set_helper(obj, value):
+            obj._spdx[name] = value
+
+        def del_helper(obj):
+            del obj._spdx[name]
+
+        attrs[name] = property(get_helper, set_helper, del_helper)
+
+    def init(self, source):
+        return source
+
+
+class _Object(_Property):
+    """
+    A scalar SPDX object property of a SPDX object
+    """
+
+    def __init__(self, cls, **kwargs):
+        super().__init__(**kwargs)
+        self.cls = cls
+
+    def set_property(self, attrs, name):
+        def get_helper(obj):
+            if not name in obj._spdx:
+                obj._spdx[name] = self.cls()
+            return obj._spdx[name]
+
+        def set_helper(obj, value):
+            obj._spdx[name] = value
+
+        def del_helper(obj):
+            del obj._spdx[name]
+
+        attrs[name] = property(get_helper, set_helper)
+
+    def init(self, source):
+        return self.cls(**source)
+
+
+class _ListProperty(_Property):
+    """
+    A list of SPDX properties
+    """
+
+    def __init__(self, prop, **kwargs):
+        super().__init__(**kwargs)
+        self.prop = prop
+
+    def set_property(self, attrs, name):
+        def get_helper(obj):
+            if not name in obj._spdx:
+                obj._spdx[name] = []
+            return obj._spdx[name]
+
+        def set_helper(obj, value):
+            obj._spdx[name] = list(value)
+
+        def del_helper(obj):
+            del obj._spdx[name]
+
+        attrs[name] = property(get_helper, set_helper, del_helper)
+
+    def init(self, source):
+        return [self.prop.init(o) for o in source]
+
+
+class _StringList(_ListProperty):
+    """
+    A list of strings as a property for an SPDX object
+    """
+
+    def __init__(self, **kwargs):
+        super().__init__(_String(), **kwargs)
+
+
+class _ObjectList(_ListProperty):
+    """
+    A list of SPDX objects as a property for an SPDX object
+    """
+
+    def __init__(self, cls, **kwargs):
+        super().__init__(_Object(cls), **kwargs)
+
+
+class MetaSPDXObject(type):
+    """
+    A metaclass that allows properties (anything derived from a _Property
+    class) to be defined for a SPDX object
+    """
+    def __new__(mcls, name, bases, attrs):
+        attrs["_properties"] = {}
+
+        for key in attrs.keys():
+            if isinstance(attrs[key], _Property):
+                prop = attrs[key]
+                attrs["_properties"][key] = prop
+                prop.set_property(attrs, key)
+
+        return super().__new__(mcls, name, bases, attrs)
+
+
+class SPDXObject(metaclass=MetaSPDXObject):
+    """
+    The base SPDX object; all SPDX spec classes must derive from this class
+    """
+    def __init__(self, **d):
+        self._spdx = {}
+
+        for name, prop in self._properties.items():
+            prop.setdefault(self._spdx, name)
+            if name in d:
+                self._spdx[name] = prop.init(d[name])
+
+    def serializer(self):
+        return self._spdx
+
+    def __setattr__(self, name, value):
+        if name in self._properties or name == "_spdx":
+            super().__setattr__(name, value)
+            return
+        raise KeyError("%r is not a valid SPDX property" % name)
+
+#
+# These are the SPDX objects implemented from the spec. The *only* properties
+# that can be added to these objects are ones directly specified in the SPDX
+# spec, however you may add helper functions to make operations easier.
+#
+# Defaults should *only* be specified if the SPDX spec says there is a certain
+# required value for a field (e.g. dataLicense), or if the field is mandatory
+# and has some sane "this field is unknown" (e.g. "NOASSERTION")
+#
+
+class SPDXAnnotation(SPDXObject):
+    annotationDate = _String()
+    annotationType = _String()
+    annotator = _String()
+    comment = _String()
+
+class SPDXChecksum(SPDXObject):
+    algorithm = _String()
+    checksumValue = _String()
+
+
+class SPDXRelationship(SPDXObject):
+    spdxElementId = _String()
+    relatedSpdxElement = _String()
+    relationshipType = _String()
+    comment = _String()
+    annotations = _ObjectList(SPDXAnnotation)
+
+
+class SPDXExternalReference(SPDXObject):
+    referenceCategory = _String()
+    referenceType = _String()
+    referenceLocator = _String()
+
+
+class SPDXPackageVerificationCode(SPDXObject):
+    packageVerificationCodeValue = _String()
+    packageVerificationCodeExcludedFiles = _StringList()
+
+
+class SPDXPackage(SPDXObject):
+    ALLOWED_CHECKSUMS = [
+        "SHA1",
+        "SHA224",
+        "SHA256",
+        "SHA384",
+        "SHA512",
+        "MD2",
+        "MD4",
+        "MD5",
+        "MD6",
+    ]
+
+    name = _String()
+    SPDXID = _String()
+    versionInfo = _String()
+    downloadLocation = _String(default="NOASSERTION")
+    supplier = _String(default="NOASSERTION")
+    homepage = _String()
+    licenseConcluded = _String(default="NOASSERTION")
+    licenseDeclared = _String(default="NOASSERTION")
+    summary = _String()
+    description = _String()
+    sourceInfo = _String()
+    copyrightText = _String(default="NOASSERTION")
+    licenseInfoFromFiles = _StringList(default=["NOASSERTION"])
+    externalRefs = _ObjectList(SPDXExternalReference)
+    packageVerificationCode = _Object(SPDXPackageVerificationCode)
+    hasFiles = _StringList()
+    packageFileName = _String()
+    annotations = _ObjectList(SPDXAnnotation)
+    checksums = _ObjectList(SPDXChecksum)
+
+
+class SPDXFile(SPDXObject):
+    SPDXID = _String()
+    fileName = _String()
+    licenseConcluded = _String(default="NOASSERTION")
+    copyrightText = _String(default="NOASSERTION")
+    licenseInfoInFiles = _StringList(default=["NOASSERTION"])
+    checksums = _ObjectList(SPDXChecksum)
+    fileTypes = _StringList()
+
+
+class SPDXCreationInfo(SPDXObject):
+    created = _String()
+    licenseListVersion = _String()
+    comment = _String()
+    creators = _StringList()
+
+
+class SPDXExternalDocumentRef(SPDXObject):
+    externalDocumentId = _String()
+    spdxDocument = _String()
+    checksum = _Object(SPDXChecksum)
+
+
+class SPDXExtractedLicensingInfo(SPDXObject):
+    name = _String()
+    comment = _String()
+    licenseId = _String()
+    extractedText = _String()
+
+
+class SPDXDocument(SPDXObject):
+    spdxVersion = _String(default="SPDX-" + SPDX_VERSION)
+    dataLicense = _String(default="CC0-1.0")
+    SPDXID = _String(default="SPDXRef-DOCUMENT")
+    name = _String()
+    documentNamespace = _String()
+    creationInfo = _Object(SPDXCreationInfo)
+    packages = _ObjectList(SPDXPackage)
+    files = _ObjectList(SPDXFile)
+    relationships = _ObjectList(SPDXRelationship)
+    externalDocumentRefs = _ObjectList(SPDXExternalDocumentRef)
+    hasExtractedLicensingInfos = _ObjectList(SPDXExtractedLicensingInfo)
+
+    def __init__(self, **d):
+        super().__init__(**d)
+
+    def to_json(self, f, *, sort_keys=False, indent=None, separators=None):
+        class Encoder(json.JSONEncoder):
+            def default(self, o):
+                if isinstance(o, SPDXObject):
+                    return o.serializer()
+
+                return super().default(o)
+
+        sha1 = hashlib.sha1()
+        for chunk in Encoder(
+            sort_keys=sort_keys,
+            indent=indent,
+            separators=separators,
+        ).iterencode(self):
+            chunk = chunk.encode("utf-8")
+            f.write(chunk)
+            sha1.update(chunk)
+
+        return sha1.hexdigest()
+
+    @classmethod
+    def from_json(cls, f):
+        return cls(**json.load(f))
+
+    def add_relationship(self, _from, relationship, _to, *, comment=None, annotation=None):
+        if isinstance(_from, SPDXObject):
+            from_spdxid = _from.SPDXID
+        else:
+            from_spdxid = _from
+
+        if isinstance(_to, SPDXObject):
+            to_spdxid = _to.SPDXID
+        else:
+            to_spdxid = _to
+
+        r = SPDXRelationship(
+            spdxElementId=from_spdxid,
+            relatedSpdxElement=to_spdxid,
+            relationshipType=relationship,
+        )
+
+        if comment is not None:
+            r.comment = comment
+
+        if annotation is not None:
+            r.annotations.append(annotation)
+
+        self.relationships.append(r)
+
+    def find_by_spdxid(self, spdxid):
+        for o in itertools.chain(self.packages, self.files):
+            if o.SPDXID == spdxid:
+                return o
+        return None
+
+    def find_external_document_ref(self, namespace):
+        for r in self.externalDocumentRefs:
+            if r.spdxDocument == namespace:
+                return r
+        return None
diff --git a/meta-xilinx-core/lib/oe/sstatesig.py b/meta-xilinx-core/lib/oe/sstatesig.py
new file mode 100644
index 00000000..d818fce8
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/sstatesig.py
@@ -0,0 +1,691 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+import bb.siggen
+import bb.runqueue
+import oe
+import netrc
+
+def sstate_rundepfilter(siggen, fn, recipename, task, dep, depname, dataCaches):
+    # Return True if we should keep the dependency, False to drop it
+    def isNative(x):
+        return x.endswith("-native")
+    def isCross(x):
+        return "-cross-" in x
+    def isNativeSDK(x):
+        return x.startswith("nativesdk-")
+    def isKernel(mc, fn):
+        inherits = " ".join(dataCaches[mc].inherits[fn])
+        return inherits.find("/module-base.bbclass") != -1 or inherits.find("/linux-kernel-base.bbclass") != -1
+    def isPackageGroup(mc, fn):
+        inherits = " ".join(dataCaches[mc].inherits[fn])
+        return "/packagegroup.bbclass" in inherits
+    def isAllArch(mc, fn):
+        inherits = " ".join(dataCaches[mc].inherits[fn])
+        return "/allarch.bbclass" in inherits
+    def isImage(mc, fn):
+        return "/image.bbclass" in " ".join(dataCaches[mc].inherits[fn])
+
+    depmc, _, deptaskname, depmcfn = bb.runqueue.split_tid_mcfn(dep)
+    mc, _ = bb.runqueue.split_mc(fn)
+
+    # We can skip the rm_work task signature to avoid running the task
+    # when we remove some tasks from the dependencie chain
+    # i.e INHERIT:remove = "create-spdx" will trigger the do_rm_work
+    if task == "do_rm_work":
+        return False
+
+    # (Almost) always include our own inter-task dependencies (unless it comes
+    # from a mcdepends). The exception is the special
+    # do_kernel_configme->do_unpack_and_patch dependency from archiver.bbclass.
+    if recipename == depname and depmc == mc:
+        if task == "do_kernel_configme" and deptaskname == "do_unpack_and_patch":
+            return False
+        return True
+
+    # Exclude well defined recipe->dependency
+    if "%s->%s" % (recipename, depname) in siggen.saferecipedeps:
+        return False
+
+    # Check for special wildcard
+    if "*->%s" % depname in siggen.saferecipedeps and recipename != depname:
+        return False
+
+    # Don't change native/cross/nativesdk recipe dependencies any further
+    if isNative(recipename) or isCross(recipename) or isNativeSDK(recipename):
+        return True
+
+    # Only target packages beyond here
+
+    # allarch packagegroups are assumed to have well behaved names which don't change between architecures/tunes
+    if isPackageGroup(mc, fn) and isAllArch(mc, fn) and not isNative(depname):
+        return False
+
+    # Exclude well defined machine specific configurations which don't change ABI
+    if depname in siggen.abisaferecipes and not isImage(mc, fn):
+        return False
+
+    # Kernel modules are well namespaced. We don't want to depend on the kernel's checksum
+    # if we're just doing an RRECOMMENDS:xxx = "kernel-module-*", not least because the checksum
+    # is machine specific.
+    # Therefore if we're not a kernel or a module recipe (inheriting the kernel classes)
+    # and we reccomend a kernel-module, we exclude the dependency.
+    if dataCaches and isKernel(depmc, depmcfn) and not isKernel(mc, fn):
+        for pkg in dataCaches[mc].runrecs[fn]:
+            if " ".join(dataCaches[mc].runrecs[fn][pkg]).find("kernel-module-") != -1:
+                return False
+
+    # Default to keep dependencies
+    return True
+
+def sstate_lockedsigs(d):
+    sigs = {}
+    types = (d.getVar("SIGGEN_LOCKEDSIGS_TYPES") or "").split()
+    for t in types:
+        siggen_lockedsigs_var = "SIGGEN_LOCKEDSIGS_%s" % t
+        lockedsigs = (d.getVar(siggen_lockedsigs_var) or "").split()
+        for ls in lockedsigs:
+            pn, task, h = ls.split(":", 2)
+            if pn not in sigs:
+                sigs[pn] = {}
+            sigs[pn][task] = [h, siggen_lockedsigs_var]
+    return sigs
+
+class SignatureGeneratorOEBasicHashMixIn(object):
+    supports_multiconfig_datacaches = True
+
+    def init_rundepcheck(self, data):
+        self.abisaferecipes = (data.getVar("SIGGEN_EXCLUDERECIPES_ABISAFE") or "").split()
+        self.saferecipedeps = (data.getVar("SIGGEN_EXCLUDE_SAFE_RECIPE_DEPS") or "").split()
+        self.lockedsigs = sstate_lockedsigs(data)
+        self.lockedhashes = {}
+        self.lockedpnmap = {}
+        self.lockedhashfn = {}
+        self.machine = data.getVar("MACHINE")
+        self.mismatch_msgs = []
+        self.mismatch_number = 0
+        self.lockedsigs_msgs = ""
+        self.unlockedrecipes = (data.getVar("SIGGEN_UNLOCKED_RECIPES") or
+                                "").split()
+        self.unlockedrecipes = { k: "" for k in self.unlockedrecipes }
+        self._internal = False
+        pass
+
+    def tasks_resolved(self, virtmap, virtpnmap, dataCache):
+        # Translate virtual/xxx entries to PN values
+        newabisafe = []
+        for a in self.abisaferecipes:
+            if a in virtpnmap:
+                newabisafe.append(virtpnmap[a])
+            else:
+                newabisafe.append(a)
+        self.abisaferecipes = newabisafe
+        newsafedeps = []
+        for a in self.saferecipedeps:
+            a1, a2 = a.split("->")
+            if a1 in virtpnmap:
+                a1 = virtpnmap[a1]
+            if a2 in virtpnmap:
+                a2 = virtpnmap[a2]
+            newsafedeps.append(a1 + "->" + a2)
+        self.saferecipedeps = newsafedeps
+
+    def rundep_check(self, fn, recipename, task, dep, depname, dataCaches = None):
+        return sstate_rundepfilter(self, fn, recipename, task, dep, depname, dataCaches)
+
+    def get_taskdata(self):
+        return (self.lockedpnmap, self.lockedhashfn, self.lockedhashes) + super().get_taskdata()
+
+    def set_taskdata(self, data):
+        self.lockedpnmap, self.lockedhashfn, self.lockedhashes = data[:3]
+        super().set_taskdata(data[3:])
+
+    def dump_sigs(self, dataCache, options):
+        if 'lockedsigs' in options:
+            sigfile = os.getcwd() + "/locked-sigs.inc"
+            bb.plain("Writing locked sigs to %s" % sigfile)
+            self.dump_lockedsigs(sigfile)
+        return super(bb.siggen.SignatureGeneratorBasicHash, self).dump_sigs(dataCache, options)
+
+
+    def get_taskhash(self, tid, deps, dataCaches):
+        if tid in self.lockedhashes:
+            if self.lockedhashes[tid]:
+                return self.lockedhashes[tid]
+            else:
+                return super().get_taskhash(tid, deps, dataCaches)
+
+        h = super().get_taskhash(tid, deps, dataCaches)
+
+        (mc, _, task, fn) = bb.runqueue.split_tid_mcfn(tid)
+
+        recipename = dataCaches[mc].pkg_fn[fn]
+        self.lockedpnmap[fn] = recipename
+        self.lockedhashfn[fn] = dataCaches[mc].hashfn[fn]
+
+        unlocked = False
+        if recipename in self.unlockedrecipes:
+            unlocked = True
+        else:
+            def recipename_from_dep(dep):
+                (depmc, _, _, depfn) = bb.runqueue.split_tid_mcfn(dep)
+                return dataCaches[depmc].pkg_fn[depfn]
+
+            # If any unlocked recipe is in the direct dependencies then the
+            # current recipe should be unlocked as well.
+            depnames = [ recipename_from_dep(x) for x in deps if mc == bb.runqueue.mc_from_tid(x)]
+            if any(x in y for y in depnames for x in self.unlockedrecipes):
+                self.unlockedrecipes[recipename] = ''
+                unlocked = True
+
+        if not unlocked and recipename in self.lockedsigs:
+            if task in self.lockedsigs[recipename]:
+                h_locked = self.lockedsigs[recipename][task][0]
+                var = self.lockedsigs[recipename][task][1]
+                self.lockedhashes[tid] = h_locked
+                self._internal = True
+                unihash = self.get_unihash(tid)
+                self._internal = False
+                #bb.warn("Using %s %s %s" % (recipename, task, h))
+
+                if h != h_locked and h_locked != unihash:
+                    self.mismatch_number += 1
+                    self.mismatch_msgs.append('The %s:%s sig is computed to be %s, but the sig is locked to %s in %s'
+                                          % (recipename, task, h, h_locked, var))
+
+                return h_locked
+
+        self.lockedhashes[tid] = False
+        #bb.warn("%s %s %s" % (recipename, task, h))
+        return h
+
+    def get_stampfile_hash(self, tid):
+        if tid in self.lockedhashes and self.lockedhashes[tid]:
+            return self.lockedhashes[tid]
+        return super().get_stampfile_hash(tid)
+
+    def get_cached_unihash(self, tid):
+        if tid in self.lockedhashes and self.lockedhashes[tid] and not self._internal:
+            return self.lockedhashes[tid]
+        return super().get_cached_unihash(tid)
+
+    def dump_sigtask(self, fn, task, stampbase, runtime):
+        tid = fn + ":" + task
+        if tid in self.lockedhashes and self.lockedhashes[tid]:
+            return
+        super(bb.siggen.SignatureGeneratorBasicHash, self).dump_sigtask(fn, task, stampbase, runtime)
+
+    def dump_lockedsigs(self, sigfile, taskfilter=None):
+        types = {}
+        for tid in self.runtaskdeps:
+            # Bitbake changed this to a tuple in newer versions
+            if isinstance(tid, tuple):
+                tid = tid[1]
+            if taskfilter:
+                if not tid in taskfilter:
+                    continue
+            fn = bb.runqueue.fn_from_tid(tid)
+            t = self.lockedhashfn[fn].split(" ")[1].split(":")[5]
+            t = 't-' + t.replace('_', '-')
+            if t not in types:
+                types[t] = []
+            types[t].append(tid)
+
+        with open(sigfile, "w") as f:
+            l = sorted(types)
+            for t in l:
+                f.write('SIGGEN_LOCKEDSIGS_%s = "\\\n' % t)
+                types[t].sort()
+                sortedtid = sorted(types[t], key=lambda tid: self.lockedpnmap[bb.runqueue.fn_from_tid(tid)])
+                for tid in sortedtid:
+                    (_, _, task, fn) = bb.runqueue.split_tid_mcfn(tid)
+                    if tid not in self.taskhash:
+                        continue
+                    f.write("    " + self.lockedpnmap[fn] + ":" + task + ":" + self.get_unihash(tid) + " \\\n")
+                f.write('    "\n')
+            f.write('SIGGEN_LOCKEDSIGS_TYPES:%s = "%s"' % (self.machine, " ".join(l)))
+
+    def dump_siglist(self, sigfile, path_prefix_strip=None):
+        def strip_fn(fn):
+            nonlocal path_prefix_strip
+            if not path_prefix_strip:
+                return fn
+
+            fn_exp = fn.split(":")
+            if fn_exp[-1].startswith(path_prefix_strip):
+                fn_exp[-1] = fn_exp[-1][len(path_prefix_strip):]
+
+            return ":".join(fn_exp)
+
+        with open(sigfile, "w") as f:
+            tasks = []
+            for taskitem in self.taskhash:
+                (fn, task) = taskitem.rsplit(":", 1)
+                pn = self.lockedpnmap[fn]
+                tasks.append((pn, task, strip_fn(fn), self.taskhash[taskitem]))
+            for (pn, task, fn, taskhash) in sorted(tasks):
+                f.write('%s:%s %s %s\n' % (pn, task, fn, taskhash))
+
+    def checkhashes(self, sq_data, missed, found, d):
+        warn_msgs = []
+        error_msgs = []
+        sstate_missing_msgs = []
+        info_msgs = None
+
+        if self.lockedsigs:
+            if len(self.lockedsigs) > 10:
+                self.lockedsigs_msgs = "There are %s recipes with locked tasks (%s task(s) have non matching signature)" % (len(self.lockedsigs), self.mismatch_number)
+            else:
+                self.lockedsigs_msgs = "The following recipes have locked tasks:"
+                for pn in self.lockedsigs:
+                    self.lockedsigs_msgs += " %s" % (pn)
+
+        for tid in sq_data['hash']:
+            if tid not in found:
+                for pn in self.lockedsigs:
+                    taskname = bb.runqueue.taskname_from_tid(tid)
+                    if sq_data['hash'][tid] in iter(self.lockedsigs[pn].values()):
+                        if taskname == 'do_shared_workdir':
+                            continue
+                        sstate_missing_msgs.append("Locked sig is set for %s:%s (%s) yet not in sstate cache?"
+                                               % (pn, taskname, sq_data['hash'][tid]))
+
+        checklevel = d.getVar("SIGGEN_LOCKEDSIGS_TASKSIG_CHECK")
+        if checklevel == 'info':
+            info_msgs = self.lockedsigs_msgs
+        if checklevel == 'warn' or checklevel == 'info':
+            warn_msgs += self.mismatch_msgs
+        elif checklevel == 'error':
+            error_msgs += self.mismatch_msgs
+
+        checklevel = d.getVar("SIGGEN_LOCKEDSIGS_SSTATE_EXISTS_CHECK")
+        if checklevel == 'warn':
+            warn_msgs += sstate_missing_msgs
+        elif checklevel == 'error':
+            error_msgs += sstate_missing_msgs
+
+        if info_msgs:
+            bb.note(info_msgs)
+        if warn_msgs:
+            bb.warn("\n".join(warn_msgs))
+        if error_msgs:
+            bb.fatal("\n".join(error_msgs))
+
+class SignatureGeneratorOEBasicHash(SignatureGeneratorOEBasicHashMixIn, bb.siggen.SignatureGeneratorBasicHash):
+    name = "OEBasicHash"
+
+class SignatureGeneratorOEEquivHash(SignatureGeneratorOEBasicHashMixIn, bb.siggen.SignatureGeneratorUniHashMixIn, bb.siggen.SignatureGeneratorBasicHash):
+    name = "OEEquivHash"
+
+    def init_rundepcheck(self, data):
+        super().init_rundepcheck(data)
+        self.server = data.getVar('BB_HASHSERVE')
+        if not self.server:
+            bb.fatal("OEEquivHash requires BB_HASHSERVE to be set")
+        self.method = data.getVar('SSTATE_HASHEQUIV_METHOD')
+        if not self.method:
+            bb.fatal("OEEquivHash requires SSTATE_HASHEQUIV_METHOD to be set")
+        self.max_parallel = int(data.getVar('BB_HASHSERVE_MAX_PARALLEL') or 1)
+        self.username = data.getVar("BB_HASHSERVE_USERNAME")
+        self.password = data.getVar("BB_HASHSERVE_PASSWORD")
+        if not self.username or not self.password:
+            try:
+                n = netrc.netrc()
+                auth = n.authenticators(self.server)
+                if auth is not None:
+                    self.username, _, self.password = auth
+            except FileNotFoundError:
+                pass
+            except netrc.NetrcParseError as e:
+                bb.warn("Error parsing %s:%s: %s" % (e.filename, str(e.lineno), e.msg))
+
+# Insert these classes into siggen's namespace so it can see and select them
+bb.siggen.SignatureGeneratorOEBasicHash = SignatureGeneratorOEBasicHash
+bb.siggen.SignatureGeneratorOEEquivHash = SignatureGeneratorOEEquivHash
+
+
+def find_siginfo(pn, taskname, taskhashlist, d):
+    """ Find signature data files for comparison purposes """
+
+    import fnmatch
+    import glob
+
+    if not taskname:
+        # We have to derive pn and taskname
+        key = pn
+        if key.startswith("mc:"):
+           # mc:<mc>:<pn>:<task>
+           _, _, pn, taskname = key.split(':', 3)
+        else:
+           # <pn>:<task>
+           pn, taskname = key.split(':', 1)
+
+    hashfiles = {}
+
+    def get_hashval(siginfo):
+        if siginfo.endswith('.siginfo'):
+            return siginfo.rpartition(':')[2].partition('_')[0]
+        else:
+            return siginfo.rpartition('.')[2]
+
+    def get_time(fullpath):
+        return os.stat(fullpath).st_mtime
+
+    # First search in stamps dir
+    localdata = d.createCopy()
+    localdata.setVar('MULTIMACH_TARGET_SYS', '*')
+    localdata.setVar('PN', pn)
+    localdata.setVar('PV', '*')
+    localdata.setVar('PR', '*')
+    localdata.setVar('EXTENDPE', '')
+    stamp = localdata.getVar('STAMP')
+    if pn.startswith("gcc-source"):
+        # gcc-source shared workdir is a special case :(
+        stamp = localdata.expand("${STAMPS_DIR}/work-shared/gcc-${PV}-${PR}")
+
+    filespec = '%s.%s.sigdata.*' % (stamp, taskname)
+    foundall = False
+    import glob
+    bb.debug(1, "Calling glob.glob on {}".format(filespec))
+    for fullpath in glob.glob(filespec):
+        match = False
+        if taskhashlist:
+            for taskhash in taskhashlist:
+                if fullpath.endswith('.%s' % taskhash):
+                    hashfiles[taskhash] = {'path':fullpath, 'sstate':False, 'time':get_time(fullpath)}
+                    if len(hashfiles) == len(taskhashlist):
+                        foundall = True
+                        break
+        else:
+            hashval = get_hashval(fullpath)
+            hashfiles[hashval] = {'path':fullpath, 'sstate':False, 'time':get_time(fullpath)}
+
+    if not taskhashlist or (len(hashfiles) < 2 and not foundall):
+        # That didn't work, look in sstate-cache
+        hashes = taskhashlist or ['?' * 64]
+        localdata = bb.data.createCopy(d)
+        for hashval in hashes:
+            localdata.setVar('PACKAGE_ARCH', '*')
+            localdata.setVar('TARGET_VENDOR', '*')
+            localdata.setVar('TARGET_OS', '*')
+            localdata.setVar('PN', pn)
+            # gcc-source is a special case, same as with local stamps above
+            if pn.startswith("gcc-source"):
+                localdata.setVar('PN', "gcc")
+            localdata.setVar('PV', '*')
+            localdata.setVar('PR', '*')
+            localdata.setVar('BB_TASKHASH', hashval)
+            localdata.setVar('SSTATE_CURRTASK', taskname[3:])
+            swspec = localdata.getVar('SSTATE_SWSPEC')
+            if taskname in ['do_fetch', 'do_unpack', 'do_patch', 'do_populate_lic', 'do_preconfigure'] and swspec:
+                localdata.setVar('SSTATE_PKGSPEC', '${SSTATE_SWSPEC}')
+            elif pn.endswith('-native') or "-cross-" in pn or "-crosssdk-" in pn:
+                localdata.setVar('SSTATE_EXTRAPATH', "${NATIVELSBSTRING}/")
+            filespec = '%s.siginfo' % localdata.getVar('SSTATE_PKG')
+
+            bb.debug(1, "Calling glob.glob on {}".format(filespec))
+            matchedfiles = glob.glob(filespec)
+            for fullpath in matchedfiles:
+                actual_hashval = get_hashval(fullpath)
+                if actual_hashval in hashfiles:
+                    continue
+                hashfiles[actual_hashval] = {'path':fullpath, 'sstate':True, 'time':get_time(fullpath)}
+
+    return hashfiles
+
+bb.siggen.find_siginfo = find_siginfo
+bb.siggen.find_siginfo_version = 2
+
+
+def sstate_get_manifest_filename(task, d):
+    """
+    Return the sstate manifest file path for a particular task.
+    Also returns the datastore that can be used to query related variables.
+    """
+    d2 = d.createCopy()
+    extrainf = d.getVarFlag("do_" + task, 'stamp-extra-info')
+    if extrainf:
+        d2.setVar("SSTATE_MANMACH", extrainf)
+    return (d2.expand("${SSTATE_MANFILEPREFIX}.%s" % task), d2)
+
+def find_sstate_manifest(taskdata, taskdata2, taskname, d, multilibcache):
+    d2 = d
+    variant = ''
+    curr_variant = ''
+    if d.getVar("BBEXTENDCURR") == "multilib":
+        curr_variant = d.getVar("BBEXTENDVARIANT")
+        if "virtclass-multilib" not in d.getVar("OVERRIDES"):
+            curr_variant = "invalid"
+    if taskdata2.startswith("virtual:multilib"):
+        variant = taskdata2.split(":")[2]
+    if curr_variant != variant:
+        if variant not in multilibcache:
+            multilibcache[variant] = oe.utils.get_multilib_datastore(variant, d)
+        d2 = multilibcache[variant]
+
+    if taskdata.endswith("-native"):
+        pkgarchs = ["${BUILD_ARCH}", "${BUILD_ARCH}_${ORIGNATIVELSBSTRING}"]
+    elif taskdata.startswith("nativesdk-"):
+        pkgarchs = ["${SDK_ARCH}_${SDK_OS}", "allarch"]
+    elif "-cross-canadian" in taskdata:
+        pkgarchs = ["${SDK_ARCH}_${SDK_ARCH}-${SDKPKGSUFFIX}"]
+    elif "-cross-" in taskdata:
+        pkgarchs = ["${BUILD_ARCH}"]
+    elif "-crosssdk" in taskdata:
+        pkgarchs = ["${BUILD_ARCH}_${SDK_ARCH}_${SDK_OS}"]
+    else:
+        pkgarchs = ['${MACHINE_ARCH}']
+        pkgarchs = pkgarchs + list(reversed(d2.getVar("PACKAGE_EXTRA_ARCHS").split()))
+        pkgarchs.append('allarch')
+        pkgarchs.append('${SDK_ARCH}_${SDK_ARCH}-${SDKPKGSUFFIX}')
+
+    searched_manifests = []
+
+    for pkgarch in pkgarchs:
+        manifest = d2.expand("${SSTATE_MANIFESTS}/manifest-%s-%s.%s" % (pkgarch, taskdata, taskname))
+        if os.path.exists(manifest):
+            return manifest, d2
+        searched_manifests.append(manifest)
+    bb.fatal("The sstate manifest for task '%s:%s' (multilib variant '%s') could not be found.\nThe pkgarchs considered were: %s.\nBut none of these manifests exists:\n    %s"
+            % (taskdata, taskname, variant, d2.expand(", ".join(pkgarchs)),"\n    ".join(searched_manifests)))
+    return None, d2
+
+def OEOuthashBasic(path, sigfile, task, d):
+    """
+    Basic output hash function
+
+    Calculates the output hash of a task by hashing all output file metadata,
+    and file contents.
+    """
+    import hashlib
+    import stat
+    import pwd
+    import grp
+    import re
+    import fnmatch
+
+    def update_hash(s):
+        s = s.encode('utf-8')
+        h.update(s)
+        if sigfile:
+            sigfile.write(s)
+
+    h = hashlib.sha256()
+    prev_dir = os.getcwd()
+    corebase = d.getVar("COREBASE")
+    tmpdir = d.getVar("TMPDIR")
+    include_owners = os.environ.get('PSEUDO_DISABLED') == '0'
+    if "package_write_" in task or task == "package_qa":
+        include_owners = False
+    include_timestamps = False
+    include_root = True
+    if task == "package":
+        include_timestamps = True
+        include_root = False
+        source_date_epoch = float(d.getVar("SOURCE_DATE_EPOCH"))
+    hash_version = d.getVar('HASHEQUIV_HASH_VERSION')
+    extra_sigdata = d.getVar("HASHEQUIV_EXTRA_SIGDATA")
+
+    filemaps = {}
+    for m in (d.getVar('SSTATE_HASHEQUIV_FILEMAP') or '').split():
+        entry = m.split(":")
+        if len(entry) != 3 or entry[0] != task:
+            continue
+        filemaps.setdefault(entry[1], [])
+        filemaps[entry[1]].append(entry[2])
+
+    try:
+        os.chdir(path)
+        basepath = os.path.normpath(path)
+
+        update_hash("OEOuthashBasic\n")
+        if hash_version:
+            update_hash(hash_version + "\n")
+
+        if extra_sigdata:
+            update_hash(extra_sigdata + "\n")
+
+        # It is only currently useful to get equivalent hashes for things that
+        # can be restored from sstate. Since the sstate object is named using
+        # SSTATE_PKGSPEC and the task name, those should be included in the
+        # output hash calculation.
+        update_hash("SSTATE_PKGSPEC=%s\n" % d.getVar('SSTATE_PKGSPEC'))
+        update_hash("task=%s\n" % task)
+
+        for root, dirs, files in os.walk('.', topdown=True):
+            # Sort directories to ensure consistent ordering when recursing
+            dirs.sort()
+            files.sort()
+
+            def process(path):
+                s = os.lstat(path)
+
+                if stat.S_ISDIR(s.st_mode):
+                    update_hash('d')
+                elif stat.S_ISCHR(s.st_mode):
+                    update_hash('c')
+                elif stat.S_ISBLK(s.st_mode):
+                    update_hash('b')
+                elif stat.S_ISSOCK(s.st_mode):
+                    update_hash('s')
+                elif stat.S_ISLNK(s.st_mode):
+                    update_hash('l')
+                elif stat.S_ISFIFO(s.st_mode):
+                    update_hash('p')
+                else:
+                    update_hash('-')
+
+                def add_perm(mask, on, off='-'):
+                    if mask & s.st_mode:
+                        update_hash(on)
+                    else:
+                        update_hash(off)
+
+                add_perm(stat.S_IRUSR, 'r')
+                add_perm(stat.S_IWUSR, 'w')
+                if stat.S_ISUID & s.st_mode:
+                    add_perm(stat.S_IXUSR, 's', 'S')
+                else:
+                    add_perm(stat.S_IXUSR, 'x')
+
+                if include_owners:
+                    # Group/other permissions are only relevant in pseudo context
+                    add_perm(stat.S_IRGRP, 'r')
+                    add_perm(stat.S_IWGRP, 'w')
+                    if stat.S_ISGID & s.st_mode:
+                        add_perm(stat.S_IXGRP, 's', 'S')
+                    else:
+                        add_perm(stat.S_IXGRP, 'x')
+
+                    add_perm(stat.S_IROTH, 'r')
+                    add_perm(stat.S_IWOTH, 'w')
+                    if stat.S_ISVTX & s.st_mode:
+                        update_hash('t')
+                    else:
+                        add_perm(stat.S_IXOTH, 'x')
+
+                    try:
+                        update_hash(" %10s" % pwd.getpwuid(s.st_uid).pw_name)
+                        update_hash(" %10s" % grp.getgrgid(s.st_gid).gr_name)
+                    except KeyError as e:
+                        msg = ("KeyError: %s\nPath %s is owned by uid %d, gid %d, which doesn't match "
+                            "any user/group on target. This may be due to host contamination." %
+                            (e, os.path.abspath(path), s.st_uid, s.st_gid))
+                        raise Exception(msg).with_traceback(e.__traceback__)
+
+                if include_timestamps:
+                    # Need to clamp to SOURCE_DATE_EPOCH
+                    if s.st_mtime > source_date_epoch:
+                        update_hash(" %10d" % source_date_epoch)
+                    else:
+                        update_hash(" %10d" % s.st_mtime)
+
+                update_hash(" ")
+                if stat.S_ISBLK(s.st_mode) or stat.S_ISCHR(s.st_mode):
+                    update_hash("%9s" % ("%d.%d" % (os.major(s.st_rdev), os.minor(s.st_rdev))))
+                else:
+                    update_hash(" " * 9)
+
+                filterfile = False
+                for entry in filemaps:
+                    if fnmatch.fnmatch(path, entry):
+                        filterfile = True
+
+                update_hash(" ")
+                if stat.S_ISREG(s.st_mode) and not filterfile:
+                    update_hash("%10d" % s.st_size)
+                else:
+                    update_hash(" " * 10)
+
+                update_hash(" ")
+                fh = hashlib.sha256()
+                if stat.S_ISREG(s.st_mode):
+                    # Hash file contents
+                    if filterfile:
+                        # Need to ignore paths in crossscripts and postinst-useradd files.
+                        with open(path, 'rb') as d:
+                            chunk = d.read()
+                            chunk = chunk.replace(bytes(basepath, encoding='utf8'), b'')
+                            for entry in filemaps:
+                                if not fnmatch.fnmatch(path, entry):
+                                    continue
+                                for r in filemaps[entry]:
+                                    if r.startswith("regex-"):
+                                        chunk = re.sub(bytes(r[6:], encoding='utf8'), b'', chunk)
+                                    else:
+                                        chunk = chunk.replace(bytes(r, encoding='utf8'), b'')
+                            fh.update(chunk)
+                    else:
+                        with open(path, 'rb') as d:
+                            for chunk in iter(lambda: d.read(4096), b""):
+                                fh.update(chunk)
+                    update_hash(fh.hexdigest())
+                else:
+                    update_hash(" " * len(fh.hexdigest()))
+
+                update_hash(" %s" % path)
+
+                if stat.S_ISLNK(s.st_mode):
+                    update_hash(" -> %s" % os.readlink(path))
+
+                update_hash("\n")
+
+            # Process this directory and all its child files
+            if include_root or root != ".":
+                process(root)
+            for f in files:
+                if f == 'fixmepath':
+                    continue
+                process(os.path.join(root, f))
+
+            for dir in dirs:
+                if os.path.islink(os.path.join(root, dir)):
+                    process(os.path.join(root, dir))
+    finally:
+        os.chdir(prev_dir)
+
+    return h.hexdigest()
+
+
diff --git a/meta-xilinx-core/lib/oe/terminal.py b/meta-xilinx-core/lib/oe/terminal.py
new file mode 100644
index 00000000..4412bc14
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/terminal.py
@@ -0,0 +1,332 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+import logging
+import oe.classutils
+import shlex
+from bb.process import Popen, ExecutionError
+
+logger = logging.getLogger('BitBake.OE.Terminal')
+
+
+class UnsupportedTerminal(Exception):
+    pass
+
+class NoSupportedTerminals(Exception):
+    def __init__(self, terms):
+        self.terms = terms
+
+
+class Registry(oe.classutils.ClassRegistry):
+    command = None
+
+    def __init__(cls, name, bases, attrs):
+        super(Registry, cls).__init__(name.lower(), bases, attrs)
+
+    @property
+    def implemented(cls):
+        return bool(cls.command)
+
+
+class Terminal(Popen, metaclass=Registry):
+    def __init__(self, sh_cmd, title=None, env=None, d=None):
+        from subprocess import STDOUT
+        fmt_sh_cmd = self.format_command(sh_cmd, title)
+        try:
+            Popen.__init__(self, fmt_sh_cmd, env=env, stderr=STDOUT)
+        except OSError as exc:
+            import errno
+            if exc.errno == errno.ENOENT:
+                raise UnsupportedTerminal(self.name)
+            else:
+                raise
+
+    def format_command(self, sh_cmd, title):
+        fmt = {'title': title or 'Terminal', 'command': sh_cmd, 'cwd': os.getcwd() }
+        if isinstance(self.command, str):
+            return shlex.split(self.command.format(**fmt))
+        else:
+            return [element.format(**fmt) for element in self.command]
+
+class XTerminal(Terminal):
+    def __init__(self, sh_cmd, title=None, env=None, d=None):
+        Terminal.__init__(self, sh_cmd, title, env, d)
+        if not os.environ.get('DISPLAY'):
+            raise UnsupportedTerminal(self.name)
+
+class Gnome(XTerminal):
+    command = 'gnome-terminal -t "{title}" -- {command}'
+    priority = 2
+
+    def __init__(self, sh_cmd, title=None, env=None, d=None):
+        # Recent versions of gnome-terminal does not support non-UTF8 charset:
+        # https://bugzilla.gnome.org/show_bug.cgi?id=732127; as a workaround,
+        # clearing the LC_ALL environment variable so it uses the locale.
+        # Once fixed on the gnome-terminal project, this should be removed.
+        if os.getenv('LC_ALL'): os.putenv('LC_ALL','')
+
+        XTerminal.__init__(self, sh_cmd, title, env, d)
+
+class Mate(XTerminal):
+    command = 'mate-terminal --disable-factory -t "{title}" -x {command}'
+    priority = 2
+
+class Xfce(XTerminal):
+    command = 'xfce4-terminal -T "{title}" -e "{command}"'
+    priority = 2
+
+class Terminology(XTerminal):
+    command = 'terminology -T="{title}" -e {command}'
+    priority = 2
+
+class Konsole(XTerminal):
+    command = 'konsole --separate --workdir . -p tabtitle="{title}" -e {command}'
+    priority = 2
+
+    def __init__(self, sh_cmd, title=None, env=None, d=None):
+        # Check version
+        vernum = check_terminal_version("konsole")
+        if vernum and bb.utils.vercmp_string_op(vernum, "2.0.0", "<"):
+            # Konsole from KDE 3.x
+            self.command = 'konsole -T "{title}" -e {command}'
+        elif vernum and bb.utils.vercmp_string_op(vernum, "16.08.1", "<"):
+            # Konsole pre 16.08.01 Has nofork
+            self.command = 'konsole --nofork --workdir . -p tabtitle="{title}" -e {command}'
+        XTerminal.__init__(self, sh_cmd, title, env, d)
+
+class XTerm(XTerminal):
+    command = 'xterm -T "{title}" -e {command}'
+    priority = 1
+
+class Rxvt(XTerminal):
+    command = 'rxvt -T "{title}" -e {command}'
+    priority = 1
+
+class URxvt(XTerminal):
+    command = 'urxvt -T "{title}" -e {command}'
+    priority = 1
+
+class Screen(Terminal):
+    command = 'screen -D -m -t "{title}" -S devshell {command}'
+
+    def __init__(self, sh_cmd, title=None, env=None, d=None):
+        s_id = "devshell_%i" % os.getpid()
+        self.command = "screen -D -m -t \"{title}\" -S %s {command}" % s_id
+        Terminal.__init__(self, sh_cmd, title, env, d)
+        msg = 'Screen started. Please connect in another terminal with ' \
+            '"screen -r %s"' % s_id
+        if (d):
+            bb.event.fire(bb.event.LogExecTTY(msg, "screen -r %s" % s_id,
+                                              0.5, 10), d)
+        else:
+            logger.warning(msg)
+
+class TmuxRunning(Terminal):
+    """Open a new pane in the current running tmux window"""
+    name = 'tmux-running'
+    command = 'tmux split-window -c "{cwd}" "{command}"'
+    priority = 2.75
+
+    def __init__(self, sh_cmd, title=None, env=None, d=None):
+        if not bb.utils.which(os.getenv('PATH'), 'tmux'):
+            raise UnsupportedTerminal('tmux is not installed')
+
+        if not os.getenv('TMUX'):
+            raise UnsupportedTerminal('tmux is not running')
+
+        if not check_tmux_pane_size('tmux'):
+            raise UnsupportedTerminal('tmux pane too small or tmux < 1.9 version is being used')
+
+        Terminal.__init__(self, sh_cmd, title, env, d)
+
+class TmuxNewWindow(Terminal):
+    """Open a new window in the current running tmux session"""
+    name = 'tmux-new-window'
+    command = 'tmux new-window -c "{cwd}" -n "{title}" "{command}"'
+    priority = 2.70
+
+    def __init__(self, sh_cmd, title=None, env=None, d=None):
+        if not bb.utils.which(os.getenv('PATH'), 'tmux'):
+            raise UnsupportedTerminal('tmux is not installed')
+
+        if not os.getenv('TMUX'):
+            raise UnsupportedTerminal('tmux is not running')
+
+        Terminal.__init__(self, sh_cmd, title, env, d)
+
+class Tmux(Terminal):
+    """Start a new tmux session and window"""
+    command = 'tmux new -c "{cwd}" -d -s devshell -n devshell "{command}"'
+    priority = 0.75
+
+    def __init__(self, sh_cmd, title=None, env=None, d=None):
+        if not bb.utils.which(os.getenv('PATH'), 'tmux'):
+            raise UnsupportedTerminal('tmux is not installed')
+
+        # TODO: consider using a 'devshell' session shared amongst all
+        # devshells, if it's already there, add a new window to it.
+        window_name = 'devshell-%i' % os.getpid()
+
+        self.command = 'tmux new -c "{{cwd}}" -d -s {0} -n {0} "{{command}}"'
+        if not check_tmux_version('1.9'):
+            # `tmux new-session -c` was added in 1.9;
+            # older versions fail with that flag
+            self.command = 'tmux new -d -s {0} -n {0} "{{command}}"'
+        self.command = self.command.format(window_name)
+        Terminal.__init__(self, sh_cmd, title, env, d)
+
+        attach_cmd = 'tmux att -t {0}'.format(window_name)
+        msg = 'Tmux started. Please connect in another terminal with `tmux att -t {0}`'.format(window_name)
+        if d:
+            bb.event.fire(bb.event.LogExecTTY(msg, attach_cmd, 0.5, 10), d)
+        else:
+            logger.warning(msg)
+
+class Custom(Terminal):
+    command = 'false' # This is a placeholder
+    priority = 3
+
+    def __init__(self, sh_cmd, title=None, env=None, d=None):
+        self.command = d and d.getVar('OE_TERMINAL_CUSTOMCMD')
+        if self.command:
+            if not '{command}' in self.command:
+                self.command += ' {command}'
+            Terminal.__init__(self, sh_cmd, title, env, d)
+            logger.warning('Custom terminal was started.')
+        else:
+            logger.debug('No custom terminal (OE_TERMINAL_CUSTOMCMD) set')
+            raise UnsupportedTerminal('OE_TERMINAL_CUSTOMCMD not set')
+
+
+def prioritized():
+    return Registry.prioritized()
+
+def get_cmd_list():
+    terms = Registry.prioritized()
+    cmds = []
+    for term in terms:
+        if term.command:
+            cmds.append(term.command)
+    return cmds
+
+def spawn_preferred(sh_cmd, title=None, env=None, d=None):
+    """Spawn the first supported terminal, by priority"""
+    for terminal in prioritized():
+        try:
+            spawn(terminal.name, sh_cmd, title, env, d)
+            break
+        except UnsupportedTerminal:
+            pass
+        except:
+            bb.warn("Terminal %s is supported but did not start" % (terminal.name))
+    # when we've run out of options
+    else:
+        raise NoSupportedTerminals(get_cmd_list())
+
+def spawn(name, sh_cmd, title=None, env=None, d=None):
+    """Spawn the specified terminal, by name"""
+    logger.debug('Attempting to spawn terminal "%s"', name)
+    try:
+        terminal = Registry.registry[name]
+    except KeyError:
+        raise UnsupportedTerminal(name)
+
+    # We need to know when the command completes but some terminals (at least
+    # gnome and tmux) gives us no way to do this. We therefore write the pid
+    # to a file using a "phonehome" wrapper script, then monitor the pid
+    # until it exits.
+    import tempfile
+    import time
+    pidfile = tempfile.NamedTemporaryFile(delete = False).name
+    try:
+        sh_cmd = bb.utils.which(os.getenv('PATH'), "oe-gnome-terminal-phonehome") + " " + pidfile + " " + sh_cmd
+        pipe = terminal(sh_cmd, title, env, d)
+        output = pipe.communicate()[0]
+        if output:
+            output = output.decode("utf-8")
+        if pipe.returncode != 0:
+            raise ExecutionError(sh_cmd, pipe.returncode, output)
+
+        while os.stat(pidfile).st_size <= 0:
+            time.sleep(0.01)
+            continue
+        with open(pidfile, "r") as f:
+            pid = int(f.readline())
+    finally:
+        os.unlink(pidfile)
+
+    while True:
+        try:
+            os.kill(pid, 0)
+            time.sleep(0.1)
+        except OSError:
+           return
+
+def check_tmux_version(desired):
+    vernum = check_terminal_version("tmux")
+    if vernum and bb.utils.vercmp_string_op(vernum, desired, "<"):
+        return False
+    return vernum
+
+def check_tmux_pane_size(tmux):
+    import subprocess as sub
+    # On older tmux versions (<1.9), return false. The reason
+    # is that there is no easy way to get the height of the active panel
+    # on current window without nested formats (available from version 1.9)
+    if not check_tmux_version('1.9'):
+        return False
+    try:
+        p = sub.Popen('%s list-panes -F "#{?pane_active,#{pane_height},}"' % tmux,
+                shell=True,stdout=sub.PIPE,stderr=sub.PIPE)
+        out, err = p.communicate()
+        size = int(out.strip())
+    except OSError as exc:
+        import errno
+        if exc.errno == errno.ENOENT:
+            return None
+        else:
+            raise
+
+    return size/2 >= 19
+
+def check_terminal_version(terminalName):
+    import subprocess as sub
+    try:
+        cmdversion = '%s --version' % terminalName
+        if terminalName.startswith('tmux'):
+            cmdversion = '%s -V' % terminalName
+        newenv = os.environ.copy()
+        newenv["LANG"] = "C"
+        p = sub.Popen(['sh', '-c', cmdversion], stdout=sub.PIPE, stderr=sub.PIPE, env=newenv)
+        out, err = p.communicate()
+        ver_info = out.decode().rstrip().split('\n')
+    except OSError as exc:
+        import errno
+        if exc.errno == errno.ENOENT:
+            return None
+        else:
+            raise
+    vernum = None
+    for ver in ver_info:
+        if ver.startswith('Konsole'):
+            vernum = ver.split(' ')[-1]
+        if ver.startswith('GNOME Terminal'):
+            vernum = ver.split(' ')[-1]
+        if ver.startswith('MATE Terminal'):
+            vernum = ver.split(' ')[-1]
+        if ver.startswith('tmux'):
+            vernum = ver.split()[-1]
+        if ver.startswith('tmux next-'):
+            vernum = ver.split()[-1][5:]
+    return vernum
+
+def distro_name():
+    try:
+        p = Popen(['lsb_release', '-i'])
+        out, err = p.communicate()
+        distro = out.split(':')[1].strip().lower()
+    except:
+        distro = "unknown"
+    return distro
diff --git a/meta-xilinx-core/lib/oe/types.py b/meta-xilinx-core/lib/oe/types.py
new file mode 100644
index 00000000..b929afb1
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/types.py
@@ -0,0 +1,188 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import errno
+import re
+import os
+
+
+class OEList(list):
+    """OpenEmbedded 'list' type
+
+    Acts as an ordinary list, but is constructed from a string value and a
+    separator (optional), and re-joins itself when converted to a string with
+    str().  Set the variable type flag to 'list' to use this type, and the
+    'separator' flag may be specified (defaulting to whitespace)."""
+
+    name = "list"
+
+    def __init__(self, value, separator = None):
+        if value is not None:
+            list.__init__(self, value.split(separator))
+        else:
+            list.__init__(self)
+
+        if separator is None:
+            self.separator = " "
+        else:
+            self.separator = separator
+
+    def __str__(self):
+        return self.separator.join(self)
+
+def choice(value, choices):
+    """OpenEmbedded 'choice' type
+
+    Acts as a multiple choice for the user.  To use this, set the variable
+    type flag to 'choice', and set the 'choices' flag to a space separated
+    list of valid values."""
+    if not isinstance(value, str):
+        raise TypeError("choice accepts a string, not '%s'" % type(value))
+
+    value = value.lower()
+    choices = choices.lower()
+    if value not in choices.split():
+        raise ValueError("Invalid choice '%s'.  Valid choices: %s" %
+                         (value, choices))
+    return value
+
+class NoMatch(object):
+    """Stub python regex pattern object which never matches anything"""
+    def findall(self, string, flags=0):
+        return None
+
+    def finditer(self, string, flags=0):
+        return None
+
+    def match(self, flags=0):
+        return None
+
+    def search(self, string, flags=0):
+        return None
+
+    def split(self, string, maxsplit=0):
+        return None
+
+    def sub(pattern, repl, string, count=0):
+        return None
+
+    def subn(pattern, repl, string, count=0):
+        return None
+
+NoMatch = NoMatch()
+
+def regex(value, regexflags=None):
+    """OpenEmbedded 'regex' type
+
+    Acts as a regular expression, returning the pre-compiled regular
+    expression pattern object.  To use this type, set the variable type flag
+    to 'regex', and optionally, set the 'regexflags' type to a space separated
+    list of the flags to control the regular expression matching (e.g.
+    FOO[regexflags] += 'ignorecase').  See the python documentation on the
+    're' module for a list of valid flags."""
+
+    flagval = 0
+    if regexflags:
+        for flag in regexflags.split():
+            flag = flag.upper()
+            try:
+                flagval |= getattr(re, flag)
+            except AttributeError:
+                raise ValueError("Invalid regex flag '%s'" % flag)
+
+    if not value:
+        # Let's ensure that the default behavior for an undefined or empty
+        # variable is to match nothing. If the user explicitly wants to match
+        # anything, they can match '.*' instead.
+        return NoMatch
+
+    try:
+        return re.compile(value, flagval)
+    except re.error as exc:
+        raise ValueError("Invalid regex value '%s': %s" %
+                         (value, exc.args[0]))
+
+def boolean(value):
+    """OpenEmbedded 'boolean' type
+
+    Valid values for true: 'yes', 'y', 'true', 't', '1'
+    Valid values for false: 'no', 'n', 'false', 'f', '0', None
+    """
+    if value is None:
+        return False
+
+    if isinstance(value, bool):
+        return value
+
+    if not isinstance(value, str):
+        raise TypeError("boolean accepts a string, not '%s'" % type(value))
+
+    value = value.lower()
+    if value in ('yes', 'y', 'true', 't', '1'):
+        return True
+    elif value in ('no', 'n', 'false', 'f', '0'):
+        return False
+    raise ValueError("Invalid boolean value '%s'" % value)
+
+def integer(value, numberbase=10):
+    """OpenEmbedded 'integer' type
+
+    Defaults to base 10, but this can be specified using the optional
+    'numberbase' flag."""
+
+    return int(value, int(numberbase))
+
+_float = float
+def float(value, fromhex='false'):
+    """OpenEmbedded floating point type
+
+    To use this type, set the type flag to 'float', and optionally set the
+    'fromhex' flag to a true value (obeying the same rules as for the
+    'boolean' type) if the value is in base 16 rather than base 10."""
+
+    if boolean(fromhex):
+        return _float.fromhex(value)
+    else:
+        return _float(value)
+
+def path(value, relativeto='', normalize='true', mustexist='false'):
+    value = os.path.join(relativeto, value)
+
+    if boolean(normalize):
+        value = os.path.normpath(value)
+
+    if boolean(mustexist):
+        try:
+            with open(value, 'r'):
+                pass
+        except IOError as exc:
+            if exc.errno == errno.ENOENT:
+                raise ValueError("{0}: {1}".format(value, os.strerror(errno.ENOENT)))
+
+    return value
+
+def is_x86(arch):
+    """
+    Check whether arch is x86 or x86_64
+    """
+    if arch.startswith('x86_') or re.match('i.*86', arch):
+        return True
+    else:
+        return False
+
+def qemu_use_kvm(kvm, target_arch):
+    """
+    Enable kvm if target_arch == build_arch or both of them are x86 archs.
+    """
+
+    use_kvm = False
+    if kvm and boolean(kvm):
+        build_arch = os.uname()[4]
+        if is_x86(build_arch) and is_x86(target_arch):
+            use_kvm = True
+        elif build_arch == target_arch:
+            use_kvm = True
+    return use_kvm
diff --git a/meta-xilinx-core/lib/oe/useradd.py b/meta-xilinx-core/lib/oe/useradd.py
new file mode 100644
index 00000000..54aa86fe
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/useradd.py
@@ -0,0 +1,71 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+import argparse
+import re
+
+class myArgumentParser(argparse.ArgumentParser):
+    def _print_message(self, message, file=None):
+        bb.warn("%s - %s: %s" % (d.getVar('PN'), pkg, message))
+
+    # This should never be called...
+    def exit(self, status=0, message=None):
+        message = message or ("%s - %s: useradd.bbclass: Argument parsing exited" % (d.getVar('PN'), pkg))
+        error(message)
+
+    def error(self, message):
+        bb.fatal(message)
+
+def split_commands(params):
+    params = re.split('''[ \t]*;[ \t]*(?=(?:[^'"]|'[^']*'|"[^"]*")*$)''', params.strip())
+    # Remove any empty items
+    return [x for x in params if x]
+
+def split_args(params):
+    params = re.split('''[ \t]+(?=(?:[^'"]|'[^']*'|"[^"]*")*$)''', params.strip())
+    # Remove any empty items
+    return [x for x in params if x]
+
+def build_useradd_parser():
+    # The following comes from --help on useradd from shadow
+    parser = myArgumentParser(prog='useradd')
+    parser.add_argument("-b", "--base-dir", metavar="BASE_DIR", help="base directory for the home directory of the new account")
+    parser.add_argument("-c", "--comment", metavar="COMMENT", help="GECOS field of the new account")
+    parser.add_argument("-d", "--home-dir", metavar="HOME_DIR", help="home directory of the new account")
+    parser.add_argument("-D", "--defaults", help="print or change default useradd configuration", action="store_true")
+    parser.add_argument("-e", "--expiredate", metavar="EXPIRE_DATE", help="expiration date of the new account")
+    parser.add_argument("-f", "--inactive", metavar="INACTIVE", help="password inactivity period of the new account")
+    parser.add_argument("-g", "--gid", metavar="GROUP", help="name or ID of the primary group of the new account")
+    parser.add_argument("-G", "--groups", metavar="GROUPS", help="list of supplementary groups of the new account")
+    parser.add_argument("-k", "--skel", metavar="SKEL_DIR", help="use this alternative skeleton directory")
+    parser.add_argument("-K", "--key", metavar="KEY=VALUE", help="override /etc/login.defs defaults")
+    parser.add_argument("-l", "--no-log-init", help="do not add the user to the lastlog and faillog databases", action="store_true")
+    parser.add_argument("-m", "--create-home", help="create the user's home directory", action="store_const", const=True)
+    parser.add_argument("-M", "--no-create-home", dest="create_home", help="do not create the user's home directory", action="store_const", const=False)
+    parser.add_argument("-N", "--no-user-group", dest="user_group", help="do not create a group with the same name as the user", action="store_const", const=False)
+    parser.add_argument("-o", "--non-unique", help="allow to create users with duplicate (non-unique UID)", action="store_true")
+    parser.add_argument("-p", "--password", metavar="PASSWORD", help="encrypted password of the new account")
+    parser.add_argument("-R", "--root", metavar="CHROOT_DIR", help="directory to chroot into")
+    parser.add_argument("-r", "--system", help="create a system account", action="store_true")
+    parser.add_argument("-s", "--shell", metavar="SHELL", help="login shell of the new account")
+    parser.add_argument("-u", "--uid", metavar="UID", help="user ID of the new account")
+    parser.add_argument("-U", "--user-group", help="create a group with the same name as the user", action="store_const", const=True)
+    parser.add_argument("LOGIN", help="Login name of the new user")
+
+    return parser
+
+def build_groupadd_parser():
+    # The following comes from --help on groupadd from shadow
+    parser = myArgumentParser(prog='groupadd')
+    parser.add_argument("-f", "--force", help="exit successfully if the group already exists, and cancel -g if the GID is already used", action="store_true")
+    parser.add_argument("-g", "--gid", metavar="GID", help="use GID for the new group")
+    parser.add_argument("-K", "--key", metavar="KEY=VALUE", help="override /etc/login.defs defaults")
+    parser.add_argument("-o", "--non-unique", help="allow to create groups with duplicate (non-unique) GID", action="store_true")
+    parser.add_argument("-p", "--password", metavar="PASSWORD", help="use this encrypted password for the new group")
+    parser.add_argument("-R", "--root", metavar="CHROOT_DIR", help="directory to chroot into")
+    parser.add_argument("-r", "--system", help="create a system account", action="store_true")
+    parser.add_argument("GROUP", help="Group name of the new group")
+
+    return parser
diff --git a/meta-xilinx-core/lib/oe/utils.py b/meta-xilinx-core/lib/oe/utils.py
new file mode 100644
index 00000000..c9c7a470
--- /dev/null
+++ b/meta-xilinx-core/lib/oe/utils.py
@@ -0,0 +1,529 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import subprocess
+import multiprocessing
+import traceback
+import errno
+
+def read_file(filename):
+    try:
+        f = open( filename, "r" )
+    except IOError as reason:
+        return "" # WARNING: can't raise an error now because of the new RDEPENDS handling. This is a bit ugly. :M:
+    else:
+        data = f.read().strip()
+        f.close()
+        return data
+    return None
+
+def ifelse(condition, iftrue = True, iffalse = False):
+    if condition:
+        return iftrue
+    else:
+        return iffalse
+
+def conditional(variable, checkvalue, truevalue, falsevalue, d):
+    if d.getVar(variable) == checkvalue:
+        return truevalue
+    else:
+        return falsevalue
+
+def vartrue(var, iftrue, iffalse, d):
+    import oe.types
+    if oe.types.boolean(d.getVar(var)):
+        return iftrue
+    else:
+        return iffalse
+
+def less_or_equal(variable, checkvalue, truevalue, falsevalue, d):
+    if float(d.getVar(variable)) <= float(checkvalue):
+        return truevalue
+    else:
+        return falsevalue
+
+def version_less_or_equal(variable, checkvalue, truevalue, falsevalue, d):
+    result = bb.utils.vercmp_string(d.getVar(variable), checkvalue)
+    if result <= 0:
+        return truevalue
+    else:
+        return falsevalue
+
+def both_contain(variable1, variable2, checkvalue, d):
+    val1 = d.getVar(variable1)
+    val2 = d.getVar(variable2)
+    val1 = set(val1.split())
+    val2 = set(val2.split())
+    if isinstance(checkvalue, str):
+        checkvalue = set(checkvalue.split())
+    else:
+        checkvalue = set(checkvalue)
+    if checkvalue.issubset(val1) and checkvalue.issubset(val2):
+        return " ".join(checkvalue)
+    else:
+        return ""
+
+def set_intersect(variable1, variable2, d):
+    """
+    Expand both variables, interpret them as lists of strings, and return the
+    intersection as a flattened string.
+
+    For example:
+    s1 = "a b c"
+    s2 = "b c d"
+    s3 = set_intersect(s1, s2)
+    => s3 = "b c"
+    """
+    val1 = set(d.getVar(variable1).split())
+    val2 = set(d.getVar(variable2).split())
+    return " ".join(val1 & val2)
+
+def prune_suffix(var, suffixes, d):
+    # See if var ends with any of the suffixes listed and
+    # remove it if found
+    for suffix in suffixes:
+        if suffix and var.endswith(suffix):
+            var = var[:-len(suffix)]
+
+    prefix = d.getVar("MLPREFIX")
+    if prefix and var.startswith(prefix):
+        var = var[len(prefix):]
+
+    return var
+
+def str_filter(f, str, d):
+    from re import match
+    return " ".join([x for x in str.split() if match(f, x, 0)])
+
+def str_filter_out(f, str, d):
+    from re import match
+    return " ".join([x for x in str.split() if not match(f, x, 0)])
+
+def build_depends_string(depends, task):
+    """Append a taskname to a string of dependencies as used by the [depends] flag"""
+    return " ".join(dep + ":" + task for dep in depends.split())
+
+def inherits(d, *classes):
+    """Return True if the metadata inherits any of the specified classes"""
+    return any(bb.data.inherits_class(cls, d) for cls in classes)
+
+def features_backfill(var,d):
+    # This construct allows the addition of new features to variable specified
+    # as var
+    # Example for var = "DISTRO_FEATURES"
+    # This construct allows the addition of new features to DISTRO_FEATURES
+    # that if not present would disable existing functionality, without
+    # disturbing distributions that have already set DISTRO_FEATURES.
+    # Distributions wanting to elide a value in DISTRO_FEATURES_BACKFILL should
+    # add the feature to DISTRO_FEATURES_BACKFILL_CONSIDERED
+    features = (d.getVar(var) or "").split()
+    backfill = (d.getVar(var+"_BACKFILL") or "").split()
+    considered = (d.getVar(var+"_BACKFILL_CONSIDERED") or "").split()
+
+    addfeatures = []
+    for feature in backfill:
+        if feature not in features and feature not in considered:
+            addfeatures.append(feature)
+
+    if addfeatures:
+        d.appendVar(var, " " + " ".join(addfeatures))
+
+def all_distro_features(d, features, truevalue="1", falsevalue=""):
+    """
+    Returns truevalue if *all* given features are set in DISTRO_FEATURES,
+    else falsevalue. The features can be given as single string or anything
+    that can be turned into a set.
+
+    This is a shorter, more flexible version of
+    bb.utils.contains("DISTRO_FEATURES", features, truevalue, falsevalue, d).
+
+    Without explicit true/false values it can be used directly where
+    Python expects a boolean:
+       if oe.utils.all_distro_features(d, "foo bar"):
+           bb.fatal("foo and bar are mutually exclusive DISTRO_FEATURES")
+
+    With just a truevalue, it can be used to include files that are meant to be
+    used only when requested via DISTRO_FEATURES:
+       require ${@ oe.utils.all_distro_features(d, "foo bar", "foo-and-bar.inc")
+    """
+    return bb.utils.contains("DISTRO_FEATURES", features, truevalue, falsevalue, d)
+
+def any_distro_features(d, features, truevalue="1", falsevalue=""):
+    """
+    Returns truevalue if at least *one* of the given features is set in DISTRO_FEATURES,
+    else falsevalue. The features can be given as single string or anything
+    that can be turned into a set.
+
+    This is a shorter, more flexible version of
+    bb.utils.contains_any("DISTRO_FEATURES", features, truevalue, falsevalue, d).
+
+    Without explicit true/false values it can be used directly where
+    Python expects a boolean:
+       if not oe.utils.any_distro_features(d, "foo bar"):
+           bb.fatal("foo, bar or both must be set in DISTRO_FEATURES")
+
+    With just a truevalue, it can be used to include files that are meant to be
+    used only when requested via DISTRO_FEATURES:
+       require ${@ oe.utils.any_distro_features(d, "foo bar", "foo-or-bar.inc")
+
+    """
+    return bb.utils.contains_any("DISTRO_FEATURES", features, truevalue, falsevalue, d)
+
+def parallel_make(d, makeinst=False):
+    """
+    Return the integer value for the number of parallel threads to use when
+    building, scraped out of PARALLEL_MAKE. If no parallelization option is
+    found, returns None
+
+    e.g. if PARALLEL_MAKE = "-j 10", this will return 10 as an integer.
+    """
+    if makeinst:
+        pm = (d.getVar('PARALLEL_MAKEINST') or '').split()
+    else:
+        pm = (d.getVar('PARALLEL_MAKE') or '').split()
+    # look for '-j' and throw other options (e.g. '-l') away
+    while pm:
+        opt = pm.pop(0)
+        if opt == '-j':
+            v = pm.pop(0)
+        elif opt.startswith('-j'):
+            v = opt[2:].strip()
+        else:
+            continue
+
+        return int(v)
+
+    return ''
+
+def parallel_make_argument(d, fmt, limit=None, makeinst=False):
+    """
+    Helper utility to construct a parallel make argument from the number of
+    parallel threads specified in PARALLEL_MAKE.
+
+    Returns the input format string `fmt` where a single '%d' will be expanded
+    with the number of parallel threads to use. If `limit` is specified, the
+    number of parallel threads will be no larger than it. If no parallelization
+    option is found in PARALLEL_MAKE, returns an empty string
+
+    e.g. if PARALLEL_MAKE = "-j 10", parallel_make_argument(d, "-n %d") will return
+    "-n 10"
+    """
+    v = parallel_make(d, makeinst)
+    if v:
+        if limit:
+            v = min(limit, v)
+        return fmt % v
+    return ''
+
+def packages_filter_out_system(d):
+    """
+    Return a list of packages from PACKAGES with the "system" packages such as
+    PN-dbg PN-doc PN-locale-eb-gb removed.
+    """
+    pn = d.getVar('PN')
+    pkgfilter = [pn + suffix for suffix in ('', '-dbg', '-dev', '-doc', '-locale', '-staticdev', '-src')]
+    localepkg = pn + "-locale-"
+    pkgs = []
+
+    for pkg in d.getVar('PACKAGES').split():
+        if pkg not in pkgfilter and localepkg not in pkg:
+            pkgs.append(pkg)
+    return pkgs
+
+def getstatusoutput(cmd):
+    return subprocess.getstatusoutput(cmd)
+
+
+def trim_version(version, num_parts=2):
+    """
+    Return just the first <num_parts> of <version>, split by periods.  For
+    example, trim_version("1.2.3", 2) will return "1.2".
+    """
+    if type(version) is not str:
+        raise TypeError("Version should be a string")
+    if num_parts < 1:
+        raise ValueError("Cannot split to parts < 1")
+
+    parts = version.split(".")
+    trimmed = ".".join(parts[:num_parts])
+    return trimmed
+
+def cpu_count(at_least=1, at_most=64):
+    cpus = len(os.sched_getaffinity(0))
+    return max(min(cpus, at_most), at_least)
+
+def execute_pre_post_process(d, cmds):
+    if cmds is None:
+        return
+
+    cmds = cmds.replace(";", " ")
+
+    for cmd in cmds.split():
+        bb.note("Executing %s ..." % cmd)
+        bb.build.exec_func(cmd, d)
+
+def get_bb_number_threads(d):
+    return int(d.getVar("BB_NUMBER_THREADS") or os.cpu_count() or 1)
+
+def multiprocess_launch(target, items, d, extraargs=None):
+    max_process = get_bb_number_threads(d)
+    return multiprocess_launch_mp(target, items, max_process, extraargs)
+
+# For each item in items, call the function 'target' with item as the first
+# argument, extraargs as the other arguments and handle any exceptions in the
+# parent thread
+def multiprocess_launch_mp(target, items, max_process, extraargs=None):
+
+    class ProcessLaunch(multiprocessing.Process):
+        def __init__(self, *args, **kwargs):
+            multiprocessing.Process.__init__(self, *args, **kwargs)
+            self._pconn, self._cconn = multiprocessing.Pipe()
+            self._exception = None
+            self._result = None
+
+        def run(self):
+            try:
+                ret = self._target(*self._args, **self._kwargs)
+                self._cconn.send((None, ret))
+            except Exception as e:
+                tb = traceback.format_exc()
+                self._cconn.send((e, tb))
+
+        def update(self):
+            if self._pconn.poll():
+                (e, tb) = self._pconn.recv()
+                if e is not None:
+                    self._exception = (e, tb)
+                else:
+                    self._result = tb
+
+        @property
+        def exception(self):
+            self.update()
+            return self._exception
+
+        @property
+        def result(self):
+            self.update()
+            return self._result
+
+    launched = []
+    errors = []
+    results = []
+    items = list(items)
+    while (items and not errors) or launched:
+        if not errors and items and len(launched) < max_process:
+            args = (items.pop(),)
+            if extraargs is not None:
+                args = args + extraargs
+            p = ProcessLaunch(target=target, args=args)
+            p.start()
+            launched.append(p)
+        for q in launched:
+            # Have to manually call update() to avoid deadlocks. The pipe can be full and
+            # transfer stalled until we try and read the results object but the subprocess won't exit
+            # as it still has data to write (https://bugs.python.org/issue8426)
+            q.update()
+            # The finished processes are joined when calling is_alive()
+            if not q.is_alive():
+                if q.exception:
+                    errors.append(q.exception)
+                if q.result:
+                    results.append(q.result)
+                launched.remove(q)
+    # Paranoia doesn't hurt
+    for p in launched:
+        p.join()
+    if errors:
+        msg = ""
+        for (e, tb) in errors:
+            if isinstance(e, subprocess.CalledProcessError) and e.output:
+                msg = msg + str(e) + "\n"
+                msg = msg + "Subprocess output:"
+                msg = msg + e.output.decode("utf-8", errors="ignore")
+            else:
+                msg = msg + str(e) + ": " + str(tb) + "\n"
+        bb.fatal("Fatal errors occurred in subprocesses:\n%s" % msg)
+    return results
+
+def squashspaces(string):
+    import re
+    return re.sub(r"\s+", " ", string).strip()
+
+def rprovides_map(pkgdata_dir, pkg_dict):
+    # Map file -> pkg provider
+    rprov_map = {}
+
+    for pkg in pkg_dict:
+        path_to_pkgfile = os.path.join(pkgdata_dir, 'runtime-reverse', pkg)
+        if not os.path.isfile(path_to_pkgfile):
+            continue
+        with open(path_to_pkgfile) as f:
+            for line in f:
+                if line.startswith('RPROVIDES') or line.startswith('FILERPROVIDES'):
+                    # List all components provided by pkg.
+                    # Exclude version strings, i.e. those starting with (
+                    provides = [x for x in line.split()[1:] if not x.startswith('(')]
+                    for prov in provides:
+                        if prov in rprov_map:
+                            rprov_map[prov].append(pkg)
+                        else:
+                            rprov_map[prov] = [pkg]
+
+    return rprov_map
+
+def format_pkg_list(pkg_dict, ret_format=None, pkgdata_dir=None):
+    output = []
+
+    if ret_format == "arch":
+        for pkg in sorted(pkg_dict):
+            output.append("%s %s" % (pkg, pkg_dict[pkg]["arch"]))
+    elif ret_format == "file":
+        for pkg in sorted(pkg_dict):
+            output.append("%s %s %s" % (pkg, pkg_dict[pkg]["filename"], pkg_dict[pkg]["arch"]))
+    elif ret_format == "ver":
+        for pkg in sorted(pkg_dict):
+            output.append("%s %s %s" % (pkg, pkg_dict[pkg]["arch"], pkg_dict[pkg]["ver"]))
+    elif ret_format == "deps":
+        rprov_map = rprovides_map(pkgdata_dir, pkg_dict)
+        for pkg in sorted(pkg_dict):
+            for dep in pkg_dict[pkg]["deps"]:
+                if dep in rprov_map:
+                    # There could be multiple providers within the image
+                    for pkg_provider in rprov_map[dep]:
+                        output.append("%s|%s * %s [RPROVIDES]" % (pkg, pkg_provider, dep))
+                else:
+                    output.append("%s|%s" % (pkg, dep))
+    else:
+        for pkg in sorted(pkg_dict):
+            output.append(pkg)
+
+    output_str = '\n'.join(output)
+
+    if output_str:
+        # make sure last line is newline terminated
+        output_str += '\n'
+
+    return output_str
+
+
+# Helper function to get the host compiler version
+# Do not assume the compiler is gcc
+def get_host_compiler_version(d, taskcontextonly=False):
+    import re, subprocess
+
+    if taskcontextonly and d.getVar('BB_WORKERCONTEXT') != '1':
+        return
+
+    compiler = d.getVar("BUILD_CC")
+    # Get rid of ccache since it is not present when parsing.
+    if compiler.startswith('ccache '):
+        compiler = compiler[7:]
+    try:
+        env = os.environ.copy()
+        # datastore PATH does not contain session PATH as set by environment-setup-...
+        # this breaks the install-buildtools use-case
+        # env["PATH"] = d.getVar("PATH")
+        output = subprocess.check_output("%s --version" % compiler, \
+                    shell=True, env=env, stderr=subprocess.STDOUT).decode("utf-8")
+    except subprocess.CalledProcessError as e:
+        bb.fatal("Error running %s --version: %s" % (compiler, e.output.decode("utf-8")))
+
+    match = re.match(r".* (\d+\.\d+)\.\d+.*", output.split('\n')[0])
+    if not match:
+        bb.fatal("Can't get compiler version from %s --version output" % compiler)
+
+    version = match.group(1)
+    return compiler, version
+
+
+def host_gcc_version(d, taskcontextonly=False):
+    import re, subprocess
+
+    if taskcontextonly and d.getVar('BB_WORKERCONTEXT') != '1':
+        return
+
+    compiler = d.getVar("BUILD_CC")
+    # Get rid of ccache since it is not present when parsing.
+    if compiler.startswith('ccache '):
+        compiler = compiler[7:]
+    try:
+        env = os.environ.copy()
+        env["PATH"] = d.getVar("PATH")
+        output = subprocess.check_output("%s --version" % compiler, \
+                    shell=True, env=env, stderr=subprocess.STDOUT).decode("utf-8")
+    except subprocess.CalledProcessError as e:
+        bb.fatal("Error running %s --version: %s" % (compiler, e.output.decode("utf-8")))
+
+    match = re.match(r".* (\d+\.\d+)\.\d+.*", output.split('\n')[0])
+    if not match:
+        bb.fatal("Can't get compiler version from %s --version output" % compiler)
+
+    version = match.group(1)
+    return "-%s" % version if version in ("4.8", "4.9") else ""
+
+
+def get_multilib_datastore(variant, d):
+    localdata = bb.data.createCopy(d)
+    if variant:
+        overrides = localdata.getVar("OVERRIDES", False) + ":virtclass-multilib-" + variant
+        localdata.setVar("OVERRIDES", overrides)
+        localdata.setVar("MLPREFIX", variant + "-")
+    else:
+        origdefault = localdata.getVar("DEFAULTTUNE_MULTILIB_ORIGINAL")
+        if origdefault:
+            localdata.setVar("DEFAULTTUNE", origdefault)
+        overrides = localdata.getVar("OVERRIDES", False).split(":")
+        overrides = ":".join([x for x in overrides if not x.startswith("virtclass-multilib-")])
+        localdata.setVar("OVERRIDES", overrides)
+        localdata.setVar("MLPREFIX", "")
+    return localdata
+
+def sh_quote(string):
+    import shlex
+    return shlex.quote(string)
+
+def directory_size(root, blocksize=4096):
+    """
+    Calculate the size of the directory, taking into account hard links,
+    rounding up every size to multiples of the blocksize.
+    """
+    def roundup(size):
+        """
+        Round the size up to the nearest multiple of the block size.
+        """
+        import math
+        return math.ceil(size / blocksize) * blocksize
+
+    def getsize(filename):
+        """
+        Get the size of the filename, not following symlinks, taking into
+        account hard links.
+        """
+        stat = os.lstat(filename)
+        if stat.st_ino not in inodes:
+            inodes.add(stat.st_ino)
+            return stat.st_size
+        else:
+            return 0
+
+    inodes = set()
+    total = 0
+    for root, dirs, files in os.walk(root):
+        total += sum(roundup(getsize(os.path.join(root, name))) for name in files)
+        total += roundup(getsize(root))
+    return total
+
+# Update the mtime of a file, skip if permission/read-only issues
+def touch(filename):
+    try:
+        os.utime(filename, None)
+    except PermissionError:
+        pass
+    except OSError as e:
+        # Handle read-only file systems gracefully
+        if e.errno != errno.EROFS:
+            raise e