From fcc328032e7382bf413517ee4dddf1eca7970fe4 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung.kim@lge.com>
Date: Fri, 26 Oct 2012 17:55:52 +0900
Subject: [PATCH] perf tools: Fix LIBELF_MMAP checking
Currently checking mmap support in libelf failed due to wrong flags.
CHK libelf
CHK libdw
CHK libunwind
CHK -DLIBELF_MMAP
/tmp/ccYJwdR0.o: In function `main':
:(.text+0x18): undefined reference to `elf_begin'
collect2: error: ld returned 1 exit status
This cannot happen since we checked the elf_begin() when checking
libelf and it succeeded.
Fix it by using a same flag with libelf checking.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Borislav Petkov <bp@amd64.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1351241752-2919-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 2d0c09ab58b8..629fc6a4b0df 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -541,7 +541,8 @@ LIB_OBJS += $(OUTPUT)util/symbol-minimal.o
else # NO_LIBELF
BASIC_CFLAGS += -DLIBELF_SUPPORT
-ifeq ($(call try-cc,$(SOURCE_ELF_MMAP),$(FLAGS_COMMON),-DLIBELF_MMAP),y)
+FLAGS_LIBELF=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS)
+ifeq ($(call try-cc,$(SOURCE_ELF_MMAP),$(FLAGS_LIBELF),-DLIBELF_MMAP),y)
BASIC_CFLAGS += -DLIBELF_MMAP
endif
--
2.34.1