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Message-ID: <20090912054906.22b05848@infradead.org>
Date:	Sat, 12 Sep 2009 05:49:06 +0200
From:	Arjan van de Ven <arjan@...radead.org>
To:	Roland McGrath <roland@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	torvalds@...ux-foundation.org, jakub@...hat.com,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	x86@...nel.org
Subject: Re: [PATCH 1/2] UNREACHABLE() macro

On Fri, 11 Sep 2009 14:55:25 -0700 (PDT)
Roland McGrath <roland@...hat.com> wrote:

> > That's a bit of a mouthful.  Did you consider a runtime probe with
> > scripts/Kbuild.include's try-run, cc-option, etc?  
> 
> I did not see any precedent in the sources for using those to test for
> features by compiling particular test sources (i.e. in autoconf

look at the stackprotector flags.. they work this way already.
It gets done once per kernel build...


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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