linux-kernel - Re: [tip:x86/urgent] x86: Fix objdump version check in arch/x86/tools/chkobjdump.awk

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Date:	Thu, 17 Dec 2009 16:07:28 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Masami Hiramatsu <mhiramat@...hat.com>
CC:	mingo@...hat.com, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, tglx@...utronix.de, mingo@...e.hu,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/urgent] x86: Fix objdump version check in arch/x86/tools/chkobjdump.awk

On 12/17/2009 04:04 PM, Masami Hiramatsu wrote:
>>
>> Warning: objdump version  is older than 2.19
>> Warning: Skipping posttest.
>>
>> because it used the wrong field from `objdump -v':
>>
>> akpm:/usr/src/25> /opt/crosstool/gcc-4.0.2-glibc-2.3.6/x86_64-unknown-linux-gnu/bin/x86_64-unknown-linux-gnu-objdump -v
>> GNU objdump 2.16.1
>> Copyright 2005 Free Software Foundation, Inc.
>> This program is free software; you may redistribute it under the terms of
>> the GNU General Public License.  This program has absolutely no warranty.
> 
> 
> Oh, I didn't know that.
> On my environment, objdump shows version in below format.
> ---
> $ objdump -v
> GNU objdump version 2.19.51.0.14-1.fc11 20090722
> Copyright 2008 Free Software Foundation, Inc.
> This program is free software; you may redistribute it under the terms of
> the GNU General Public License version 3 or (at your option) any later version.
> This program has absolutely no warranty.
> ---
> 
> Hmm, maybe, we need to check if ($3 == "version") to decide
> which argument we should use.
> 

How about looking for the first argument that starts with a number?

	-hpa
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