linux-kernel - Re: [PATCH] perf: fix Makefile check for libdward

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Message-ID: <AANLkTillPMTPrmCgnnr_p8t4Vh4sFmyjISPNtAMn4O_C@mail.gmail.com>
Date:	Mon, 17 May 2010 21:36:44 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	linux-kernel@...r.kernel.org, peterz@...radead.org, mingo@...e.hu,
	paulus@...ba.org, davem@...emloft.net, fweisbec@...il.com,
	acme@...radead.org, perfmon2-devel@...ts.sf.net, eranian@...il.com
Subject: Re: [PATCH] perf: fix Makefile check for libdward

On Mon, May 17, 2010 at 9:24 PM, Masami Hiramatsu <mhiramat@...hat.com> wrote:
> Hi Stephane,
>
> Stephane Eranian wrote:
>> On Ubuntu 9.10, the elfutils/libdw package is 0.141, yet it is
>> not sufficient to compile util/probe-finder.c as it uses a type,
>> namely Dwarf_CFI, which is introduced sometime after version 0.141.
>>
>> This patch updates the libdwarf test in the Makefile to check
>> for the definition of Dwarf_CFI. If is is not there, the test
>> fails and dwarf support is disabled.
>>
>> It is not clear to me which version introduces Dwarf_CFI,
>> thus I adjusted the version message to 0.142, could be more
>> recent.
>
> Yeah, I see. I had sent a fix patch which just ignores Dwarf_CFI
> related code if the libdw version is younger than supporting it.
> Could you try the patch here?
>
Does compile now on Ubuntu 9.10 (Karmic).
Thanks.

> https://patchwork.kernel.org/patch/98216/
>
> Thank you,
>
> --
> Masami Hiramatsu
> e-mail: mhiramat@...hat.com
>



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