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From: Andi Kleen <andi@firstfloor.org>
To: acme@kernel.org
Cc: linux-kernel@vger.kernel.org, jolsa@kernel.org,
	Andi Kleen <ak@linux.intel.com>
Subject: [PATCH] perf, tools: Support static linking with libdw
Date: Wed, 12 Aug 2015 15:48:37 -0700	[thread overview]
Message-ID: <1439419717-20601-1-git-send-email-andi@firstfloor.org> (raw)

From: Andi Kleen <ak@linux.intel.com>

The Fedora 22 version of libdw requires a couple of extra libraries
to link. With a dynamic link the dependencies are pulled in automatically,
but this doesn't work for static linking. Add the needed libraries
explicitely to the feature probe and the Makefile.

v2: Explicitly check for static linking and only add the dependencies
when -static is set. This is to avoid regressions on Arnaldo's system.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
 tools/build/feature/Makefile | 7 ++++++-
 tools/perf/config/Makefile   | 6 +++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index 463ed8f..a8a5b7f 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -69,8 +69,13 @@ test-libelf.bin:
 test-glibc.bin:
 	$(BUILD)
 
+DWARFLIBS := -ldw
+ifeq ($(findstring -static,${LDFLAGS}),-static)
+DWARFLIBS += -lelf -lebl -lz -llzma -lbz2
+endif
+
 test-dwarf.bin:
-	$(BUILD) -ldw
+	$(BUILD) $(DWARFLIBS)
 
 test-libelf-mmap.bin:
 	$(BUILD) -lelf
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index 094ddae..e376a45 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -297,7 +297,11 @@ ifndef NO_LIBELF
     else
       CFLAGS += -DHAVE_DWARF_SUPPORT $(LIBDW_CFLAGS)
       LDFLAGS += $(LIBDW_LDFLAGS)
-      EXTLIBS += -ldw
+      DWARFLIBS := -ldw
+      ifeq ($(findstring -static,${LDFLAGS}),-static)
+	DWARFLIBS += -lelf -lebl -lz -llzma -lbz2
+      endif
+      EXTLIBS += ${DWARFLIBS}
       $(call detected,CONFIG_DWARF)
     endif # PERF_HAVE_DWARF_REGS
   endif # NO_DWARF
-- 
2.4.3


             reply	other threads:[~2015-08-12 22:48 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-12 22:48 Andi Kleen [this message]
2015-08-20  9:54 ` [tip:perf/core] perf tools: Support static linking with libdw tip-bot for Andi Kleen
  -- strict thread matches above, loose matches on Subject: below --
2015-08-07 22:18 [PATCH] perf, " Andi Kleen
2015-08-07 23:47 ` Arnaldo Carvalho de Melo
2015-08-08 15:29 ` Jiri Olsa
2015-08-08 16:42   ` Andi Kleen
2015-08-10 14:57     ` Arnaldo Carvalho de Melo

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