linux-kernel - Re: perf build failure on Linus's tree

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Date:	Thu, 3 May 2012 23:01:54 -0400
From:	Arnaud Lacombe <lacombar@...il.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	David Miller <davem@...emloft.net>, namhyung.kim@....com,
	a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...hat.com,
	acme@...stprotocols.net, jolsa@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: perf build failure on Linus's tree

Hi,

On Thu, May 3, 2012 at 10:47 PM, Greg KH <gregkh@...uxfoundation.org> wrote:
> On Thu, May 03, 2012 at 10:35:02PM -0400, Arnaud Lacombe wrote:
>> Hi,
>>
>> On Thu, May 3, 2012 at 10:29 PM, Arnaud Lacombe <lacombar@...il.com> wrote:
>> > [...]
>> > [0]: http://pkgs.fedoraproject.org/gitweb/?p=flex.git;a=blob;f=flex-2.5.35-hardening.patch;h=7d608ea2371fa3295bdb8eb97c15eeb03029c02b;hb=HEAD
>> >
>> as a side note, this patch sounds more being about "silencing" than
>> "hardening"...
>
> That's nice, but I can build the perf version in 3.3 just fine, so
> something broke here (hint, build regression.)  Do I have to bisect it
> down to find the problem?
>
there is most likely nothing to bisect, `perf' seems to have never
required any parser before 3.4. The way the rest of the tools
(especially `kconfig', `genksyms' and `dtc') manage parsers is via
pre-generated .[ch]_shipped version of the lexer/tokenizer. It's been
working well for a long time as such. `perf' will certainly have to
follow the same path.

 - Arnaud
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