linux-kernel - Re: [PATCH] perf auto-dep: Speed up feature tests by building them in parallel

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Message-ID: <20130930191544.GD3427@gmail.com>
Date:	Mon, 30 Sep 2013 21:15:44 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	David Ahern <dsahern@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...il.com>
Subject: Re: [PATCH] perf auto-dep: Speed up feature tests by building them
 in parallel


* Arnaldo Carvalho de Melo <acme@...stprotocols.net> wrote:

> In fact this is why I thought those messages had been missing in your 
> patchset, they don't appear when I remove perl-devel, i.e. 'perl' 
> supporty is correctly detected as not possible to build due to missing 
> deps, but no message is emitted for this case.
> 
> And the bug is that the feature test for perl support passes, but since 
> it doesn't try to use EXTERN.h, like something that is enabled when the 
> feature test passes (util/scripting-engines/trace-event-perl.c), the 
> build fails.

Hm, I probably messed up the lib-perl testcase - it was one of the more 
complex ones. I assumed that this:

...                       libperl: [ OFF ]

meant that I didn't have the dependencies installed - but it's the 
testcase that is wrong most likely.

Thanks,

	Ingo
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