linux-kernel - Re: [PATCH tracing/kprobes v3 6/7] perf: Add perf probe subcommand for kprobe-event setup helper

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Message-ID: <20091012190303.GA4748@nowhere>
Date:	Mon, 12 Oct 2009 21:03:04 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...e.hu>,
	lkml <linux-kernel@...r.kernel.org>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Christoph Hellwig <hch@...radead.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	"Frank Ch. Eigler" <fche@...hat.com>
Subject: Re: [PATCH tracing/kprobes v3 6/7] perf: Add perf probe subcommand
	for kprobe-event setup helper

On Wed, Oct 07, 2009 at 06:28:23PM -0400, Masami Hiramatsu wrote:
> Add perf probe subcommand for kprobe-event setup helper to perf command.
> This allows user to define kprobe events by C expressions (C line numbers,
> C function names, and C local variables).
>


My libdwarf.h and dwarf.h are available through <libdwarf.h> and
<dwarf.h>, these are in /usr/include

But even by fixing the include path in the makefile and probe-finder.h,
I get the following build error:

util/probe-finder.c: In function ‘die_get_entrypc’:
util/probe-finder.c:222: erreur: ‘Dwarf_Ranges’ undeclared (first use in this function)
util/probe-finder.c:222: erreur: (Each undeclared identifier is reported only once
util/probe-finder.c:222: erreur: for each function it appears in.)
util/probe-finder.c:222: erreur: ‘ranges’ undeclared (first use in this function)
cc1: warnings being treated as errors
util/probe-finder.c:223: erreur: ISO C90 forbids mixed declarations and code
util/probe-finder.c:247: erreur: implicit declaration of function ‘dwarf_get_ranges’
util/probe-finder.c:247: erreur: nested extern declaration of ‘dwarf_get_ranges’
util/probe-finder.c:251: erreur: implicit declaration of function ‘dwarf_ranges_dealloc’
util/probe-finder.c:251: erreur: nested extern declaration of ‘dwarf_ranges_dealloc’
make: *** [util/probe-finder.o] Erreur 1


I remember we talked about that before, but I don't remember well why it happened.
This is because of a libdwarf version or something, right?

Which one should I pick? Mine is:

    libdwarf.h  

    $Revision: #9 $ $Date: 2008/01/17 $


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