linux-kernel - Re: linux-next: build warning after merge of the kbuild tree

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Date:	Mon, 02 May 2011 17:31:08 +0200
From:	Michal Marek <mmarek@...e.cz>
To:	Valdis.Kletnieks@...edu
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Dave Jones <davej@...hat.com>, linux-next@...r.kernel.org,
	linux-kernel@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>
Subject: Re: linux-next: build warning after merge of the kbuild tree

On 2.5.2011 17:17, Valdis.Kletnieks@...edu wrote:
> On Mon, 02 May 2011 13:13:37 +0200, Michal Marek said:
>
>> +# We test for support of the -Wunused-but-set-variable option, because
>> +# some version of gcc will happily accept any -Wno-* switch and complain
>> +# later during build.
>> +ifeq ($(call cc-option-yn, -Wunused-but-set-variable), y)
>> +KBUILD_CFLAGS += -Wno-unused-but-set-variable
>> +endif
>
> Do we need to do this more generically for all the other -Wno-foo
> options under the various W={123} options?

I only see -Wno-unused-parameter in scripts/Makefile.build and that 
should be supported by any gcc version. Also please have a look at 
http://marc.info/?l=linux-kernel&m=130433840412201&w=2, which is an 
updated version.

Michal
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