poky-find-native-sysroot: helper script for locating the native sysroot path

Various poky scripts make use of binaries from the native sysroot.
This helper script can be used to reduce code duplication, and sets
up some environment variables you can use to identify and obtain
the correct filesystem path to the native sysroot.

It works for both in-tree Poky setups as well as toolchain
installations.

Signed-off-by: Scott Garman <scott.a.garman@intel.com>

2 files changed, 78 insertions, 0 deletions

diff --git a/meta/packages/qemu/qemu-helper-nativesdk_1.0.bb b/meta/packages/qemu/qemu-helper-nativesdk_1.0.bb
index a764a0e28a..6b4979d790 100644
--- a/meta/packages/qemu/qemu-helper-nativesdk_1.0.bb
+++ b/meta/packages/qemu/qemu-helper-nativesdk_1.0.bb
@@ -10,6 +10,7 @@ SRC_URI = "file://${POKYBASE}/scripts/poky-qemu \
            file://${POKYBASE}/scripts/poky-addptable2image \
            file://${POKYBASE}/scripts/poky-qemu-ifup \
            file://${POKYBASE}/scripts/poky-qemu-ifdown \
+           file://${POKYBASE}/scripts/poky-find-native-sysroot \
            file://tunctl.c \
            file://raw2flash.c \
           "
diff --git a/scripts/poky-find-native-sysroot b/scripts/poky-find-native-sysroot
new file mode 100755
index 0000000000..fe36a2a932
--- /dev/null
+++ b/scripts/poky-find-native-sysroot
@@ -0,0 +1,77 @@
+#!/bin/bash
+#
+# Find a native sysroot to use - either from an in-tree Poky build or
+# from a toolchain installation in /opt/poky. It then sets the variables
+# $NATIVE_SYSROOT_DIR to the sysroot's base directory, $PSEUDO to the
+# path of the pseudo binary, and $SYSROOT_MODE is set to "in-tree" or
+# "toolchain".
+#
+# This script is intended to be run within other scripts by source'ing
+# it, e.g:
+#
+# SYSROOT_SETUP_SCRIPT=`which poky-find-native-sysroot`
+# . $SYSROOT_SETUP_SCRIPT
+#
+# This script will terminate execution of your calling program unless
+# you set a variable $SKIP_STRICT_SYSROOT_CHECK to a non-empty string
+# beforehand.
+#
+# Copyright (c) 2010 Intel Corp.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+BITBAKE=`which bitbake`
+if [ -z "$BITBAKE" ]; then
+    SYSROOT_MODE="toolchain"
+    NATIVE_SYSROOT_DIR=`find /opt/poky -name "tunctl" | sed 's/\/usr\/bin\/tunctl//'`
+else
+    SYSROOT_MODE="in-tree"
+    if [ "$UID" = "0" ]; then
+        # Root cannot run bitbake unless sanity checking is disabled
+        if [ ! -d "./conf" ]; then
+            echo "Error: root cannot run bitbake by default, and I cannot find a ./conf directory to be able to disable sanity checking"
+            exit 1
+        fi
+        touch conf/sanity.conf
+        NATIVE_SYSROOT_DIR=`bitbake -e | grep ^STAGING_DIR_NATIVE | cut -d '=' -f2 | cut -d '"' -f2`
+        rm -f conf/sanity.conf
+    else
+        NATIVE_SYSROOT_DIR=`bitbake -e | grep ^STAGING_DIR_NATIVE | cut -d '=' -f2 | cut -d '"' -f2`
+    fi
+fi
+
+if [ -z "$NATIVE_SYSROOT_DIR" ]; then
+    echo "Error: Unable to locate your native sysroot."
+    echo "Did you forget to source the Poky environment script?"
+
+    if [ -z "$SKIP_STRICT_SYSROOT_CHECK" ]; then
+        exit 1
+    fi
+fi
+
+# Set up pseudo command
+if [ ! -e "$NATIVE_SYSROOT_DIR/usr/bin/pseudo" ]; then
+    echo "Error: Unable to find pseudo binary in $NATIVE_SYSROOT_DIR/usr/bin/"
+
+    if [ "$SYSROT_MODE" = "in-tree" ]; then
+        echo "Have you run 'bitbake pseudo-native'?"
+    else
+        echo "This shouldn't happen - something is wrong with your toolchain installation"
+    fi
+
+    if [ -z "$SKIP_STRICT_SYSROOT_CHECK" ]; then
+        exit 1
+    fi
+fi
+PSEUDO="$NATIVE_SYSROOT_DIR/usr/bin/pseudo"