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From: tip-bot for Masami Hiramatsu on 12 May 2010 04:50
Commit-ID: 6b3c4ef50441e85dc9b2c9b67e95e8ad1185c15e
Gitweb: http://git.kernel.org/tip/6b3c4ef50441e85dc9b2c9b67e95e8ad1185c15e
Author: Masami Hiramatsu <mhiramat(a)redhat.com>
AuthorDate: Tue, 11 May 2010 00:59:53 -0400
Committer: Arnaldo Carvalho de Melo <acme(a)redhat.com>
CommitDate: Tue, 11 May 2010 12:43:11 -0300

perf probe: Check older elfutils and set NO_DWARF

Check whether elfutils is older than 0.138 (from which version checking
routine has been introduced). And if so, set NO_DWARF because it is hard
to check the API dependency without version checking.

Signed-off-by: Masami Hiramatsu <mhiramat(a)redhat.com>
Reported-by: Robert Richter <robert.richter(a)amd.com>
Cc: Robert Richter <robert.richter(a)amd.com>
Cc: Ingo Molnar <mingo(a)elte.hu>
LKML-Reference: <20100511045953.9913.19485.stgit(a)localhost6.localdomain6>
Signed-off-by: Arnaldo Carvalho de Melo <acme(a)redhat.com>
---
tools/perf/Makefile | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 0ef5cfe..b28bb73 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -506,8 +506,8 @@ PERFLIBS = $(LIB_FILE)
-include config.mak

ifndef NO_DWARF
-ifneq ($(shell sh -c "(echo '\#include <dwarf.h>'; echo '\#include <libdw.h>'; echo 'int main(void) { Dwarf *dbg; dbg = dwarf_begin(0, DWARF_C_READ); return (long)dbg; }') | $(CC) -x c - $(ALL_CFLAGS) -I/usr/include/elfutils -ldw -lelf -o $(BITBUCKET) $(ALL_LDFLAGS) $(EXTLIBS) "$(QUIET_STDERR)" && echo y"), y)
- msg := $(warning No libdw.h found or old libdw.h found, disables dwarf support. Please install elfutils-devel/libdw-dev);
+ifneq ($(shell sh -c "(echo '\#include <dwarf.h>'; echo '\#include <libdw.h>'; echo '\#include <version.h>'; echo '\#ifndef _ELFUTILS_PREREQ'; echo '\#error'; echo '\#endif'; echo 'int main(void) { Dwarf *dbg; dbg = dwarf_begin(0, DWARF_C_READ); return (long)dbg; }') | $(CC) -x c - $(ALL_CFLAGS) -I/usr/include/elfutils -ldw -lelf -o $(BITBUCKET) $(ALL_LDFLAGS) $(EXTLIBS) "$(QUIET_STDERR)" && echo y"), y)
+ msg := $(warning No libdw.h found or old libdw.h found or elfutils is older than 0.138, disables dwarf support. Please install new elfutils-devel/libdw-dev);
NO_DWARF := 1
endif # Dwarf support
endif # NO_DWARF
--
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