linux-kernel - [PATCH] perf tools: Fix feature check for libdw dwarf unwind

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Date:	Thu, 3 Apr 2014 08:23:50 -0400
From:	Josh Boyer <jwboyer@...oraproject.org>
To:	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Jiri Olsa <jolsa@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] perf tools: Fix feature check for libdw dwarf unwind

When the feature check for libdw dwarf unwind support was added with commit
45757895c7, it required LIBDW_DIR to be set before it would work.  However,
commit 0a4f2b6a3ba implies that the libdw unwinder should be auto-detected
from the installed libraries and not require LIBDW_DIR to be set.

The feature check is failing because FEATURE_CHECK_LDFLAGS-libdw-dwarf-unwind
is only being set when LIBDW_DIR is specified.  This causes the feature test
to be built without -ldw, which causes it to fail.  Fix this by moving the
endif for the LIBDW_DIR check up.

Signed-off-by: Josh Boyer <jwboyer@...oraproject.org>
---
 tools/perf/config/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index c23418225c2c..d3e3b7a7d979 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -65,10 +65,10 @@ ifndef NO_LIBELF
   ifdef LIBDW_DIR
     LIBDW_CFLAGS  := -I$(LIBDW_DIR)/include
     LIBDW_LDFLAGS := -L$(LIBDW_DIR)/lib
+  endif

     FEATURE_CHECK_CFLAGS-libdw-dwarf-unwind := $(LIBDW_CFLAGS)
     FEATURE_CHECK_LDFLAGS-libdw-dwarf-unwind := $(LIBDW_LDFLAGS) -ldw
-  endif
 endif

 # include ARCH specific config
-- 
1.8.5.3
--
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