linux-kernel - [PATCH 2/2] perf tools: Hook up MIPS unwind and dwarf-regs in the Makefile

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Date:	Fri, 17 May 2013 12:00:38 -0700
From:	David Daney <ddaney.cavm@...il.com>
To:	linux-mips@...ux-mips.org, ralf@...ux-mips.org,
	Jiri Olsa <jolsa@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	David Daney <david.daney@...ium.com>
Subject: [PATCH 2/2] perf tools: Hook up MIPS unwind and dwarf-regs in the Makefile

From: David Daney <david.daney@...ium.com>

Define a new symbol (ARCH_SUPPORTS_LIBUNWIND) in config/Makefile.
Use this from x86 and MIPS to gate testing of libunwind.

Signed-off-by: David Daney <david.daney@...ium.com>
---
 tools/perf/config/Makefile | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index f139dcd..90a0e58 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -11,6 +11,7 @@ CFLAGS := $(EXTRA_CFLAGS) $(EXTRA_WARNINGS)
 # Additional ARCH settings for x86
 ifeq ($(ARCH),i386)
   override ARCH := x86
+  ARCH_SUPPORTS_LIBUNWIND := 1
   NO_PERF_REGS := 0
   LIBUNWIND_LIBS = -lunwind -lunwind-x86
 endif
@@ -26,10 +27,18 @@ ifeq ($(ARCH),x86_64)
     CFLAGS += -DARCH_X86_64
     ARCH_INCLUDE = ../../arch/x86/lib/memcpy_64.S ../../arch/x86/lib/memset_64.S
   endif
+  ARCH_SUPPORTS_LIBUNWIND := 1
   NO_PERF_REGS := 0
   LIBUNWIND_LIBS = -lunwind -lunwind-x86_64
 endif
 
+# Additional ARCH settings for MIPS
+ifeq ($(ARCH),mips)
+  ARCH_SUPPORTS_LIBUNWIND := 1
+  NO_PERF_REGS := 0
+  LIBUNWIND_LIBS = -lunwind -lunwind-mips
+endif
+
 ifeq ($(NO_PERF_REGS),0)
   CFLAGS += -DHAVE_PERF_REGS
 endif
@@ -204,8 +213,7 @@ ifeq ($(call try-cc,$(SOURCE_ELF_MMAP),$(FLAGS_LIBELF),-DLIBELF_MMAP),y)
 endif # try-cc
 endif # NO_LIBELF
 
-# There's only x86 (both 32 and 64) support for CFI unwind so far
-ifneq ($(ARCH),x86)
+ifndef ARCH_SUPPORTS_LIBUNWIND
   NO_LIBUNWIND := 1
 endif
 
-- 
1.7.11.7

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