2 files changed, 38 insertions, 3 deletions

diff --git a/meta/classes/native.bbclass b/meta/classes/native.bbclass
index 76a599bc15..fc7422c5d7 100644
--- a/meta/classes/native.bbclass
+++ b/meta/classes/native.bbclass
@@ -195,3 +195,34 @@ USE_NLS = "no"
 
 RECIPERDEPTASK = "do_populate_sysroot"
 do_populate_sysroot[rdeptask] = "${RECIPERDEPTASK}"
+
+#
+# Native task outputs are directly run on the target (host) system after being
+# built. Even if the output of this recipe doesn't change, a change in one of
+# its dependencies may cause a change in the output it generates (e.g. rpm
+# output depends on the output of its dependent zstd library).
+#
+# This can cause poor interactions with hash equivalence, since this recipes
+# output-changing dependency is "hidden" and downstream task only see that this
+# recipe has the same outhash and therefore is equivalent. This can result in
+# different output in different cases.
+#
+# To resolve this, unhide the output-changing dependency by adding its unihash
+# to this tasks outhash calculation. Unfortunately, don't know specifically
+# know which dependencies are output-changing, so we have to add all of them.
+#
+python native_add_do_populate_sysroot_deps () {
+    current_task = "do_" + d.getVar("BB_CURRENTTASK")
+    if current_task != "do_populate_sysroot":
+        return
+
+    taskdepdata = d.getVar("BB_TASKDEPDATA", False)
+    pn = d.getVar("PN")
+    deps = {
+        dep[0]:dep[6] for dep in taskdepdata.values() if
+            dep[1] == current_task and dep[0] != pn
+    }
+
+    d.setVar("HASHEQUIV_EXTRA_SIGDATA", "\n".join("%s: %s" % (k, deps[k]) for k in sorted(deps.keys())))
+}
+SSTATECREATEFUNCS += "native_add_do_populate_sysroot_deps"
diff --git a/meta/lib/oe/sstatesig.py b/meta/lib/oe/sstatesig.py
index 038404e377..abcd96231e 100644
--- a/meta/lib/oe/sstatesig.py
+++ b/meta/lib/oe/sstatesig.py
@@ -491,7 +491,8 @@ def OEOuthashBasic(path, sigfile, task, d):
     if task == "package":
         include_timestamps = True
         include_root = False
-    extra_content = d.getVar('HASHEQUIV_HASH_VERSION')
+    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():
@@ -506,8 +507,11 @@ def OEOuthashBasic(path, sigfile, task, d):
         basepath = os.path.normpath(path)
 
         update_hash("OEOuthashBasic\n")
-        if extra_content:
-            update_hash(extra_content + "\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