linux-kernel - Re: [PATCH] perf: use default compiler mode by default

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Message-ID: <20091123065548.GE31758@elte.hu>
Date:	Mon, 23 Nov 2009 07:55:48 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	"Michael S. Tsirkin" <mst@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf: use default compiler mode by default


* Arjan van de Ven <arjan@...radead.org> wrote:

> On Sun, 22 Nov 2009 14:13:35 +0200
> "Michael S. Tsirkin" <mst@...hat.com> wrote:
> 
> > gcc with no flags typically is a sane default for systems to use, and
> > looking at the running kernel is probably broken for cross-builds
> > anyway, so let's not do this.  Add EXTRA_CFLAGS so that users can
> > override default gcc mode if they want to.
> 
> yes please; current perf breaks if you compile it in a 32 bit chroot 
> on a 64 bit system....

ok - applied the patch with your ack.

I'd still like to hear back from Paulus whether PowerPC is affected 
negatively - IIRC it was PowerPC where we got the -m64 from originally.

Thanks,

	Ingo
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