[OE-core] [PATCH] gcc-target.inc: Remove non-related gcc headers from include_fixed folder

[Leonardo Sandoval]

This patch has not been merged yet. Any comments? otherwise merging is 
pending.

On 07/01/2015 07:57 AM, leonardo.sandoval.gonzalez at linux.intel.com wrote:
> From: Leonardo Sandoval <leonardo.sandoval.gonzalez at linux.intel.com>
>
> Without this patch, the D's include_fixed folder may change after building it
> (due to the gcc's fixinc.sh script, executed on the do_compile task) and changes
> depend on the current sysroot headers, making the gcc's builds non-deterministic.
>
> [YOCTO #7882]
>
> Signed-off-by: Leonardo Sandoval <leonardo.sandoval.gonzalez at linux.intel.com>
> ---
>   meta/recipes-devtools/gcc/gcc-target.inc | 31 +++++++++++++++++++++++++++++++
>   1 file changed, 31 insertions(+)
>
> diff --git a/meta/recipes-devtools/gcc/gcc-target.inc b/meta/recipes-devtools/gcc/gcc-target.inc
> index 5d31446..1f91107 100644
> --- a/meta/recipes-devtools/gcc/gcc-target.inc
> +++ b/meta/recipes-devtools/gcc/gcc-target.inc
> @@ -168,6 +168,37 @@ do_install () {
>   	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
> +}
> +
>   # Installing /usr/lib/gcc/* means we'd have two copies, one from gcc-cross
>   # and one from here. These can confuse gcc cross where includes use #include_next
>   # and builds track file dependencies (e.g. perl and its makedepends code).
>