linux-kernel - Re: [PATCH] perf tools: add compatibility with libelf 0.8 and autodetect

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Date:	Fri, 23 Oct 2009 23:07:38 -0200
From:	Lucas De Marchi <lucas.de.marchi@...il.com>
To:	Marti Raudsepp <marti@...fo.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Mike Galbraith <efault@....de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf tools: add compatibility with libelf 0.8 and 
	autodetect

On Fri, Oct 23, 2009 at 19:48, Marti Raudsepp <marti@...fo.org> wrote:
> On Sat, Oct 24, 2009 at 12:02 AM, Ingo Molnar <mingo@...e.hu> wrote:
>> Mind doing a small change:
>>
>> I think we want a small cleanup here: a perf_elf_begin() wrapper in a
>> header file to hide this #ifdef. (That's how Git wraps environmental
>> libraries as well.)
>
Why don't you do something like?:

#ifdef LIBELF_NO_MMAP
#define ELF_C_READ_MMAP ELF_C_READ
#endif
+ changes to Makefile

or:

#ifndef ELF_C_READ_MMAP
#define ELF_C_READ_MMAP ELF_C_READ
#endif
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