toolchain-shar-extract: compare SDK and host gcc versions

If ext sdk is built by gcc version higher than host gcc version
and host gcc version is 4.8 or 4.9 the installation is known to
fail due to the way uninative sstate package is built.

It's a known issue and we don't have a way to fix it for above
mentioned combinations of build and host gcc versions.

Detected non-installable combinations of gcc versions and
print an installation error.

[YOCTO #10881]

(From OE-Core rev: bfb9ea2604557804bd8c16adb57ccdd868a4020f)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/populate_sdk_base.bbclass

@@ -226,6 +226,7 @@ EOF
 		-e 's#@SDK_VERSION@#${SDK_VERSION}#g' \
 		-e '/@SDK_PRE_INSTALL_COMMAND@/d' \
 		-e '/@SDK_POST_INSTALL_COMMAND@/d' \
+		-e 's#@SDK_GCC_VER@#${@oe.utils.host_gcc_version(d)}#g' \
 		${SDKDEPLOYDIR}/${TOOLCHAIN_OUTPUTNAME}.sh
 
 	# add execution permission

meta/files/toolchain-shar-extract.sh

@@ -11,6 +11,9 @@ export PATH=`echo "$PATH" | sed -e 's/:\.//' -e 's/::/:/'`
 INST_ARCH=$(uname -m | sed -e "s/i[3-6]86/ix86/" -e "s/x86[-_]64/x86_64/")
 SDK_ARCH=$(echo @SDK_ARCH@ | sed -e "s/i[3-6]86/ix86/" -e "s/x86[-_]64/x86_64/")
 
+INST_GCC_VER=$(gcc --version | sed -ne 's/.* \([0-9]\+\.[0-9]\+\)\.[0-9]\+.*/\1/p')
+SDK_GCC_VER='@SDK_GCC_VER@'
+
 verlte () {
 	[  "$1" = "`printf "$1\n$2" | sort -V | head -n1`" ]
 }
@@ -112,6 +115,11 @@ fi
 # SDK_EXTENSIBLE is exposed from the SDK_PRE_INSTALL_COMMAND above
 if [ "$SDK_EXTENSIBLE" = "1" ]; then
 	DEFAULT_INSTALL_DIR="@SDKEXTPATH@"
+	if [ "$INST_GCC_VER" = '4.8' -a "$SDK_GCC_VER" = '4.9' ] || [ "$INST_GCC_VER" = '4.8' -a "$SDK_GCC_VER" = '' ] || \
+		[ "$INST_GCC_VER" = '4.9' -a "$SDK_GCC_VER" = '' ]; then
+		echo "Error: Incompatible SDK installer! Your host gcc version is $INST_GCC_VER and this SDK was built by gcc higher version."
+		exit 1
+	fi
 fi
 
 if [ "$target_sdk_dir" = "" ]; then