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Date: Fri, 4 May 2012 12:03:12 -0300
From: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
To: Arnaud Lacombe <lacombar@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>, Greg KH <gregkh@linuxfoundation.org>,
        David Miller <davem@davemloft.net>, namhyung.kim@lge.com,
        a.p.zijlstra@chello.nl, paulus@samba.org, mingo@redhat.com,
        jolsa@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [patch] perf: Fix build failure on OpenSuse userspace
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Em Fri, May 04, 2012 at 10:44:28AM -0400, Arnaud Lacombe escreveu:
>     CC util/parse-events-flex.o
> <stdout>: In function ‘yy_get_next_buffer’:
> <stdout>:1510:3: error: comparison between signed and unsigned integer
> expressions [-Werror=sign-compare]
> util/parse-events.l: In function ‘parse_events_lex’:
> util/parse-events.l:122:1: error: ignoring return value of
> ‘fwrite’, 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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