linux-kernel - [tip:perf/probes] perf: Check libdwarf APIs for perf probe

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Message-ID: <tip-4c20194c2de151bca14224ae384b47abf7636a95@git.kernel.org>
Date:	Sat, 17 Oct 2009 10:05:57 GMT
From:	tip-bot for Masami Hiramatsu <mhiramat@...hat.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, paulus@...ba.org, acme@...hat.com,
	hpa@...or.com, mingo@...hat.com, a.p.zijlstra@...llo.nl,
	fweisbec@...il.com, rostedt@...dmis.org, tglx@...utronix.de,
	mhiramat@...hat.com, mingo@...e.hu
Subject: [tip:perf/probes] perf: Check libdwarf APIs for perf probe

Commit-ID:  4c20194c2de151bca14224ae384b47abf7636a95
Gitweb:     http://git.kernel.org/tip/4c20194c2de151bca14224ae384b47abf7636a95
Author:     Masami Hiramatsu <mhiramat@...hat.com>
AuthorDate: Fri, 16 Oct 2009 20:07:52 -0400
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Sat, 17 Oct 2009 09:53:59 +0200

perf: Check libdwarf APIs for perf probe

Check libdwarf APIs for perf probe in tools/perf/Makefile. Since
dwarf_get_ranges() has been added from libdwarf 20081231 (and
it's the newest function used in probe-finder.c), this just
checks whether the function is defined.

Signed-off-by: Masami Hiramatsu <mhiramat@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
LKML-Reference: <20091017000752.16556.92051.stgit@...p-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 tools/perf/Makefile |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 52b1f43..03c27b9 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -420,8 +420,8 @@ ifneq ($(shell sh -c "(echo '\#include <libelf.h>'; echo 'int main(void) { Elf *
 	msg := $(error No libelf.h/libelf found, please install libelf-dev/elfutils-libelf-devel);
 endif
 
-ifneq ($(shell sh -c "(echo '\#include <libdwarf/dwarf.h>'; echo '\#include <libdwarf/libdwarf.h>'; echo 'int main(void) { Dwarf_Debug dbg; Dwarf_Error err; dwarf_init(0, DW_DLC_READ, 0, 0, &dbg, &err); return (long)dbg; }') | $(CC) -x c - $(ALL_CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -ldwarf -lelf -o /dev/null $(ALL_LDFLAGS) > /dev/null 2>&1 && echo y"), y)
-	msg := $(warning No libdwarf.h found, disables dwarf support. Please install libdwarf-dev/libdwarf-devel);
+ifneq ($(shell sh -c "(echo '\#include <libdwarf/dwarf.h>'; echo '\#include <libdwarf/libdwarf.h>'; echo 'int main(void) { Dwarf_Debug dbg; Dwarf_Error err; Dwarf_Ranges *rng; dwarf_init(0, DW_DLC_READ, 0, 0, &dbg, &err); dwarf_get_ranges(dbg, 0, &rng, 0, 0, &err); return (long)dbg; }') | $(CC) -x c - $(ALL_CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -ldwarf -lelf -o /dev/null $(ALL_LDFLAGS) > /dev/null 2>&1 && echo y"), y)
+	msg := $(warning No libdwarf.h found or old libdwarf.h found, disables dwarf support. Please install libdwarf-dev/libdwarf-devel >= 20081231);
 	BASIC_CFLAGS += -DNO_LIBDWARF
 else
 	EXTLIBS += -lelf -ldwarf
--
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