gcc: unify cleanup of include-fixed, apply to cross-canadian

Since target and cross variants were already doing similar cleanup
of include-fixed headers, as those aren't used, unify the code and
also apply the same to cross-canadian variant.

Some of those header files get processed with a tool that leaves
absolute buildpaths inside the file's commented section, causing
QA errors. Since those aren't used, let's remove them.

This may be a temporary solution until the tool itself gets fixed
to not embed absolute buildpaths in the header files:
https://lists.openembedded.org/g/openembedded-core/topic/107268307

(From OE-Core rev: 9221e4ab8cca4c06dc3d5c1de2fd4ce46477578a)

Signed-off-by: Denys Dmytriyenko <denys@konsulko.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/gcc/gcc-common.inc

@@ -138,3 +138,7 @@ remove_sysroot_paths_from_checksum_options () {
 	sed -i "s@${DEBUG_PREFIX_MAP}@@g" ${B}/gcc/checksum-options
 	sed -i "s@$stagingdir@$replacement@g" ${B}/gcc/checksum-options
 }
+
+cleanup_installed_include_fixed () {
+	find ${D}${libdir}/gcc/${TARGET_SYS}/${BINV}/include-fixed -type f -not -name "README" -not -name limits.h -not -name syslimits.h | xargs rm -f
+}

meta/recipes-devtools/gcc/gcc-cross-canadian.inc

@@ -175,6 +175,8 @@ do_install () {
 			done
 		done
 	done
+
+	cleanup_installed_include_fixed
 }
 
 ELFUTILS = "nativesdk-elfutils"

meta/recipes-devtools/gcc/gcc-cross.inc

@@ -110,7 +110,7 @@ do_install () {
 	cp ${S}/libquadmath/quadmath.h ${D}${libdir}/gcc/${TARGET_SYS}/${BINV}/include/
 	cp ${S}/libquadmath/quadmath_weak.h ${D}${libdir}/gcc/${TARGET_SYS}/${BINV}/include/
 
-	find ${D}${libdir}/gcc/${TARGET_SYS}/${BINV}/include-fixed -type f -not -name "README" -not -name limits.h -not -name syslimits.h | xargs rm -f
+	cleanup_installed_include_fixed
 
 	# install LTO linker plugins where binutils tools can find it
 	install -d ${D}${libdir}/bfd-plugins

meta/recipes-devtools/gcc/gcc-target.inc

@@ -193,37 +193,8 @@ do_install () {
 	install -d ${D}${libdir}/bfd-plugins
 	ln -sf ${libexecdir}/gcc/${TARGET_SYS}/${BINV}/liblto_plugin.so ${D}${libdir}/bfd-plugins/liblto_plugin.so
 	chown -R root:root ${D}
-}
 
-do_install:append () {
-        #
-        # Thefixinc.sh script, run on the gcc's compile phase, looks into sysroot header
-        # files and places the modified files into
-        # {D}${libdir}/gcc/${TARGET_SYS}/${BINV}/include-fixed folder. This makes the
-        # build not deterministic. The following code prunes all those headers
-        # except those under include-fixed/linux, *limits.h and README, yielding
-        # the same include-fixed folders no matter what sysroot
-
-        include_fixed="${D}${libdir}/gcc/${TARGET_SYS}/${BINV}/include-fixed"
-        for f in $(find ${include_fixed} -type f); do
-                case $f in
-                */include-fixed/linux/*)
-                    continue
-                    ;;
-                */include-fixed/*limits.h)
-                    continue
-                    ;;
-                */include-fixed/README)
-                    continue
-                    ;;
-                *)
-                    # remove file and directory if empty
-                    bbdebug 2 "Pruning $f"
-                    rm $f
-                    find $(dirname $f) -maxdepth 0 -empty -exec rmdir {} \;
-                    ;;
-                esac
-        done
+	cleanup_installed_include_fixed
 }
 
 # Installing /usr/lib/gcc/* means we'd have two copies, one from gcc-cross