[Buildroot] [PATCH v4] gcc: explicitly use C{XX}FLAGS_FOR_TARGET instead of --enable-target-optspace

Alexey Brodkin Alexey.Brodkin at synopsys.com
Mon Sep 8 05:53:22 UTC 2014

Hi Thomas,

On Mon, 2014-09-01 at 11:55 +0400, Alexey Brodkin wrote:
> From: Alexey Brodkin <Alexey.Brodkin at synopsys.com>
> The gcc.mk file is passing --enable-target-optspace to gcc configure
> script, to ask for space-optimized (-Os) target libraries. However,
> passing this option has the effect of overriding any custom
> CFLAGS_FOR_TARGET or CXXFLAGS_FOR_TARGET values that may be passed.
> These are some situations when it is required to pass custom flags on buildong
> of libgcc:
>  * Default flags "-g -Os" lead to build isses as with PowerPC on gcc 4.5
> (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43810)
>  * Particular CPU requires specific instructions for HW support
>  * Deep optimizations
> Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
> Cc: Anton Kolesov <akolesov at synopsys.com>
> Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
> Cc: Peter Korsgaard <peter at korsgaard.com>
> Cc: Gustavo Zacarias <gustavo at zacarias.com.ar>
> ---
> Compared to v3 use "=" instead of ":=" which is not actually required here.

I'm wondering if this version is fine and we may go ahead an apply it?


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