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To: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
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        Thomas Gleixner <tglx@linutronix.de>, Borislav Petkov <bp@alien8.de>,
        Namhyung Kim <namhyung.kim@lge.com>, Jiri Olsa <jolsa@redhat.com>,
        Arun Sharma <asharma@fb.com>, Michael Rubin <mrubin@google.com>,
        David Sharp <dhsharp@google.com>,
        Vaibhav Nagarnaik <vnagarnaik@google.com>,
        Julia Lawall <julia@diku.dk>, Tom Zanussi <tzanussi@gmail.com>
Subject: Re: Our failure on tracing tools unification
References: <1333666086-6517-1-git-send-email-fweisbec@gmail.com>
	<20120423144743.GB29985@somewhere> <1335193719.28150.171.camel@twins>
	<20120425080525.GA32613@gmail.com>
From: fche@redhat.com (Frank Ch. Eigler)
Date: Wed, 25 Apr 2012 10:19:35 -0400
In-Reply-To: <20120425080525.GA32613@gmail.com> (Ingo Molnar's message of "Wed, 25 Apr 2012 10:05:25 +0200")
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mingo wrote:

> [...]  One thing that would suck is perf being bound by various
> versions of this library floating out there.

Could the event parser shared library be ABI-preserving?  If so, what
would perf have to fear?

> [...] We had nothing but pain from external libraries so far [...]

If the elfutils, newt, gtk, bfd, iberty, zlib, python libraries didn't
contribute useful and un-rewriteable functionality, perf would not be
using them.


- FChE