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Date: Wed, 21 Jan 2015 07:13:04 +0100
From: Ingo Molnar <mingo@kernel.org>
To: Jiri Olsa <jolsa@kernel.org>
Cc: linux-kernel@vger.kernel.org, Adrian Hunter <adrian.hunter@intel.com>,
        Alexis Berlemont <alexis.berlemont@gmail.com>,
        Andi Kleen <ak@linux.intel.com>, Anton Blanchard <anton@samba.org>,
        Arnaldo Carvalho de Melo <acme@redhat.com>,
        Borislav Petkov <bp@alien8.de>, Borislav Petkov <bp@suse.de>,
        Cody P Schafer <cody@linux.vnet.ibm.com>,
        Corey Ashford <cjashfor@linux.vnet.ibm.com>,
        David Ahern <dsahern@gmail.com>,
        Florian Fainelli <florian@openwrt.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Jan Heylen <heyleke@gmail.com>, Mark Salter <msalter@redhat.com>,
        Namhyung Kim <namhyung@kernel.org>, Paul Mackerras <paulus@samba.org>,
        Peter Zijlstra <peterz@infradead.org>,
        "S. Lockwood-Childs" <sjl@vctlabs.com>,
        Sam Ravnborg <sam@ravnborg.org>, Sasha Levin <sasha.levin@oracle.com>,
        Stephane Eranian <eranian@google.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
        Will Deacon <will.deacon@arm.com>
Subject: Re: [PATCHv3 00/36] perf tools: New build framework
Message-ID: <20150121061304.GB15963@gmail.com>
References: <1421771973-6022-1-git-send-email-jolsa@kernel.org>
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* Jiri Olsa <jolsa@kernel.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