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CFLAGS used in libgcc makefile?

From: "Amker.Cheng" <amker dot cheng at gmail dot com>
To: gcc at gcc dot gnu dot org
Date: Tue, 13 Sep 2011 18:22:31 +0800
Subject: CFLAGS used in libgcc makefile?

Hi guys,
Is it CFLAGS used by libgcc/Makefile.in to build libgcc.a?
It seems if I configure gcc with CFLAGS="-O0 -g " environment
variable, libgcc is also compiled with -O0 option.
I'm wondering why do not use CFLAGS_FOR_TARGET
here(CFLAGS->INTERNAL_CFLAGS->gcc_compile_bare->gcc_compile).

Please help, thanks.

-- 
Best Regards.

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