[OE-core] [PATCH] Disable building libgcc with -O0

[Saul Wold]

Please fix up the comment to follow the guildlines on this patch and 
your other one.

http://www.openembedded.org/wiki/Commit_Patch_Message_Guidelines

Sau!


On 11/10/2013 08:30 PM, Lei Liu wrote:
> Link error happens for valgrind when linking unoptimized libgcc.
> Libgcc requires symbol _Unwind_Resume defined in libgcc_eh which
> in turn requires pulling in entire glibc.  We can't make valgrind
> link with glibc due to its design.  So don't build libgcc without
> optimizations, so that calls to _Unwind_Resume get eliminated.
>
> Signed-off-by: Lei Liu <lei.liu2 at windriver.com>
> ---
>   meta/recipes-devtools/gcc/gcc-cross.inc | 9 +++++++++
>   1 file changed, 9 insertions(+)
>
> diff --git a/meta/recipes-devtools/gcc/gcc-cross.inc b/meta/recipes-devtools/gcc/gcc-cross.inc
> index 25a3142..cf03c08 100644
> --- a/meta/recipes-devtools/gcc/gcc-cross.inc
> +++ b/meta/recipes-devtools/gcc/gcc-cross.inc
> @@ -25,6 +25,15 @@ EXTRA_OECONF_PATHS = " \
>
>   ARCH_FLAGS_FOR_TARGET += "-isystem${STAGING_DIR_TARGET}${target_includedir}"
>
> +def get_optimization(d):
> +    selected_optimization = d.getVar("SELECTED_OPTIMIZATION", True)
> +    if base_contains("SELECTED_OPTIMIZATION", "-O0", "x", "", d) == "x":
> +        bb.note("libgcc can't be built with -O0, -O2 will be used instead.")
> +        return selected_optimization.replace("-O0", "-O2")
> +    return selected_optimization
> +
> +SELECTED_OPTIMIZATION := "${@get_optimization(d)}"
> +
>   do_configure_prepend () {
>   	sed -i 's/BUILD_INFO=info/BUILD_INFO=/' ${S}/gcc/configure
>   }
> --
> 1.8.2.1
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