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Subject: Re: problem with ccflags := -Werror in Makefiles when building
 with gcc 4.6.0
From: Joe Perches <joe@perches.com>
To: Douglas Mencken <dougmencken@gmail.com>
Cc: linux-kernel@vger.kernel.org, Borislav Petkov <bp@alien8.de>,
        Michal Marek <mmarek@suse.cz>, Sam Ravnborg <sam@ravnborg.org>,
        Ingo Molnar <mingo@elte.hu>,
        linux-kbuild <linux-kbuild@vger.kernel.org>
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Date: Wed, 09 Mar 2011 09:22:50 -0800
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On Wed, 2011-03-09 at 17:28 +0100, Douglas Mencken wrote:
> When building with gcc 4.6.0 with the new type of warnings introduced,
> -Wunused-but-set-variable, many directories with ccflags set to
> -Werror in Makefile fail to build.

After the kbuild W=<level> gets accepted,
it might be reasonable to add another W
level to make warnings fatal and remove
all -Werror entries from the various Makefiles.

See Borislav's patch
https://lkml.org/lkml/2011/3/1/76

and Ingo's idea
https://lkml.org/lkml/2011/3/9/186