linux-kernel - Re: [PATCH] perf tools: Makefile: Use gcc to determine ARCH

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Message-ID: <20110507094006.GH27657@elte.hu>
Date:	Sat, 7 May 2011 11:40:06 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Lin Ming <ming.m.lin@...el.com>
Cc:	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Riccardo Magliocchetti <riccardo.magliocchetti@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf tools: Makefile: Use gcc to determine ARCH


* Lin Ming <ming.m.lin@...el.com> wrote:

> The original Makefile uses "uname -m" to determine ARCH.
> This causes problem on x86 when compile perf tool on 32 bit userspace
> with a 64 bit kernel.
> 
> bench/../../../arch/x86/lib/memcpy_64.S: Assembler messages:
> bench/../../../arch/x86/lib/memcpy_64.S:28: Error: bad register name `%rdi'
> 
> This is because "uname -m" returns x86_64 and memcpy_64.S is included in 32 bit build.
> 
> Signed-off-by: Lin Ming <ming.m.lin@...el.com>

this changelog is missing an important line:

 Reported-by: Riccardo Magliocchetti <riccardo.magliocchetti@...il.com>

I've added it.

Thanks,

	Ingo
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