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From: Sam Ravnborg <sam@ravnborg.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Michal Marek <mmarek@suse.cz>, Borislav Petkov <bp@alien8.de>,
	Arnd Bergmann <arnd@arndb.de>,
	torvalds@linux-foundation.org, x86@kernel.org,
	linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org,
	bp@amd64.org
Subject: Re: [PATCH -v5] kbuild: Add extra gcc checks
Date: Wed, 9 Mar 2011 18:56:25 +0100	[thread overview]
Message-ID: <20110309175625.GA29181@merkur.ravnborg.org> (raw)
In-Reply-To: <20110309151134.GA15730@elte.hu>

> Another, related, very nice kbuild feature would be to allow for arch maintainers to 
> mark certain files as "should only build fine without warnings" - i.e. -Werror 
> should be the default. There would be a Kconfig feature to opt out of this, 
> CONFIG_CC_IGNORE_WARNINGS=y or so. This would allow for people to still build the 
> kernel with old (or buggy) versions of GCC.

To add -Werror for all files conditionally you can do:

    ccflags-$(CONFIG_WERROR) += -Werror

For individual files we can then drop -Werror like this:

    CFLAGS_REMOVE_foobar.o := -Werror

So it should be doable with the existing infrastructure.

	Sam

  reply	other threads:[~2011-03-09 17:56 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-03-01  8:35 [PATCH -v5] kbuild: Add extra gcc checks Borislav Petkov
2011-03-09 14:45 ` Michal Marek
2011-03-09 15:06   ` Borislav Petkov
2011-03-09 15:11   ` Ingo Molnar
2011-03-09 17:56     ` Sam Ravnborg [this message]
2011-03-10  9:04       ` Ingo Molnar
2011-03-10  9:17         ` Michal Marek
2011-03-10 10:25           ` Sam Ravnborg
2011-03-10  9:20         ` Borislav Petkov
2011-03-10 11:56         ` Arnd Bergmann

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