linux-kernel - Re: [patch] perf build questions

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Message-Id: <20091006102626.8b4f7810.randy.dunlap@oracle.com>
Date:	Tue, 6 Oct 2009 10:26:26 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [patch] perf build questions

On Tue, 06 Oct 2009 10:48:59 +0200 Peter Zijlstra wrote:

> On Mon, 2009-10-05 at 13:17 -0700, Randy Dunlap wrote:
> > Hi,
> > 
> > How do I build 'perf' for an i386 target when running on x86_64?
> 
> make NO_64BIT=1

$ make NO_64BIT=1 all
$ file perf
perf: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), for GNU/Linux 2.6.4, dynamically linked (uses shared libs), not stripped


Shouldn't that be a 32-bit executable for i386?
Am I confused?  (you don't have to answer that)


> > and how do I do 'perf' cross-builds in general?
> 
> make CC=arm-linux-gcc AR=arm-linux-ar STRIP=arm-linux-strip
> 
> I think,.. but I don't have full cross build environments, just the bare
> binutils+gcc bits to cross build kernels.
> 
> > Also, I see build errors/warnings (-Werror).  Others aren't seeing these?
> > Just due to my gcc version?
> 
> Didn't see any here, but what frederic said..



---
~Randy
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