linux-kernel - Re: [patch] perf: Fix build failure on OpenSuse userspace

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Date:	Fri, 4 May 2012 12:03:12 -0300
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Arnaud Lacombe <lacombar@...il.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	David Miller <davem@...emloft.net>, namhyung.kim@....com,
	a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...hat.com,
	jolsa@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [patch] perf: Fix build failure on OpenSuse userspace

Em Fri, May 04, 2012 at 10:44:28AM -0400, Arnaud Lacombe escreveu:
>     CC util/parse-events-flex.o
> <stdout>: In function â€˜yy_get_next_bufferâ€™:
> <stdout>:1510:3: error: comparison between signed and unsigned integer
> expressions [-Werror=sign-compare]
> util/parse-events.l: In function â€˜parse_events_lexâ€™:
> util/parse-events.l:122:1: error: ignoring return value of
> â€˜fwriteâ€™, declared with attribute warn_unused_result
> [-Werror=unused-result]
> cc1: all warnings being treated as errors
> 
> So I doubt -Wno-unused-parameter will do any good here.
> 
> How about my solution, pre-generating the lexer/tokenizer ? It has
> been used without trouble in other place of the tree for years. I
> don't really see the point of micro-managing flex/bison issue here.

This was what we did in the first place:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=89812fc81f8d62d70433a8ff63d26819f372e8ec

Then we asked Linus about it and he said:

https://lkml.org/lkml/2012/3/28/417

So we:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=65f3e56e0c81d1f581c4bdef7646ae5a8d51f494

- Arnaldo
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