linux-kernel - Re: [PATCHv3 00/36] perf tools: New build framework

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Message-ID: <20150121061304.GB15963@gmail.com>
Date:	Wed, 21 Jan 2015 07:13:04 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Jiri Olsa <jolsa@...nel.org>
Cc:	linux-kernel@...r.kernel.org,
	Adrian Hunter <adrian.hunter@...el.com>,
	Alexis Berlemont <alexis.berlemont@...il.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Anton Blanchard <anton@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Borislav Petkov <bp@...en8.de>, Borislav Petkov <bp@...e.de>,
	Cody P Schafer <cody@...ux.vnet.ibm.com>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	David Ahern <dsahern@...il.com>,
	Florian Fainelli <florian@...nwrt.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jan Heylen <heyleke@...il.com>,
	Mark Salter <msalter@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"S. Lockwood-Childs" <sjl@...labs.com>,
	Sam Ravnborg <sam@...nborg.org>,
	Sasha Levin <sasha.levin@...cle.com>,
	Stephane Eranian <eranian@...gle.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
	Will Deacon <will.deacon@....com>
Subject: Re: [PATCHv3 00/36] perf tools: New build framework


* Jiri Olsa <jolsa@...nel.org> wrote:

> hi,
> I'm following up on latest post from Alexis:
>   http://marc.info/?l=linux-kernel&m=141427580405357&w=2
> 
> v3 changes:
>   - disabling only builtin rules, keeping builtin variables in place
>     because some projects we depends on using them (traceevent) [David]
>   - fixed empy source list issue that happened on arm [Will, Mark]
>   - updated to the current Arnaldo's perf/core branch
>   - added automated tests into: tools/build/tests/
>   - tested on arm64,ppc64,s390,x86_64,i386
> 
> v2 changes:
>   - build Makefiles librarized and moved to 'tools/build' [Ingo]
>   - several minor fixies [Namhyung]
>   - tested on other archs now - x86_64, i386, powerpc
>   - moved tools/lib/* under new build framework to show
>     that it's possible ;-)
>     included traceevent/lockdep maintainers to get the feedback
>   - omitted last 2 patches
> 
> The patchset is also available in:
>   git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
>   perf/build
> 
> All tests/make tests passed.

Very nice! I gave it a quick test and saw no problems, behavior, 
speed and functionality of the build appears to be identical to 
the old system.

> Also now we have the full dependency check ((gcc -Wp,-MD,... 
> stuff) and build command line is stored/checked automatically 
> by the build system.

Btw., another thing that might be nice to extract into 
tools/build/ [or tools/config/] is the build/OS features 
detection framework - it goes hand in hand with the build
system.

Thanks,

	Ingo
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