Commit-ID: 2cdbc46d7b2cb0acb68c3ecad93b000552121fa6
Gitweb: http://git.kernel.org/tip/2cdbc46d7b2cb0acb68c3ecad93b000552121fa6
Author: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
AuthorDate: Wed, 5 Aug 2009 14:05:16 +0200
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Wed, 5 Aug 2009 14:12:08 +0200
perf: Auto-detect libbfd
Since the C++ demangling isn't needed for everybody and
bfd/iberty aren't widely/easily available on all machines, make
it optional.
It also allows you to forcefully disable demangling by using
NO_DEMANGLE=1 and otherwise tries to detect libbfd/libiberty
combinations that result in a compiling demangler.
Reported-by: Jens Axboe <jens.axboe@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Kyle McMartin <kyle@xxxxxxxxxxx>
LKML-Reference: <20090801082048.GX12579@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
tools/perf/Makefile | 18 +++++++++++++++++-
tools/perf/util/symbol.c | 9 +++++++++
2 files changed, 26 insertions(+), 1 deletions(-)
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 4b20fa4..ff905ac 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -345,7 +345,6 @@ BUILTIN_OBJS += builtin-stat.o
BUILTIN_OBJS += builtin-top.o
PERFLIBS = $(LIB_FILE)
-EXTLIBS = -lbfd -liberty
#
# Platform specific tweaks
@@ -374,6 +373,23 @@ ifeq ($(uname_S),Darwin)
PTHREAD_LIBS =
endif
+ifdef NO_DEMANGLE
+ BASIC_CFLAGS += -DNO_DEMANGLE
+else
+
+ has_bfd := $(shell sh -c "(echo '\#include <stdio.h>'; echo '\#include <bfd.h>'; echo '\#ifndef DMGL_PARAMS'; echo '\#define DMGL_PARAMS (1 << 0)'; echo '\#define DMGL_ANSI (1 << 1)'; echo '\#endif'; echo 'int main(int argc, char **argv) { bfd_demangle(NULL, argv[0], DMGL_PARAMS | DMGL_ANSI); return 0; }') | gcc -x c - -lbfd > /dev/null 2>&1 && echo y")
+
+ has_bfd_iberty := $(shell sh -c "(echo '\#include <stdio.h>'; echo '\#include <bfd.h>'; echo '\#ifndef DMGL_PARAMS'; echo '\#define DMGL_PARAMS (1 << 0)'; echo '\#define DMGL_ANSI (1 << 1)'; echo '\#endif'; echo 'int main(int argc, char **argv) { bfd_demangle(NULL, argv[0], DMGL_PARAMS | DMGL_ANSI); return 0; }') | gcc -x c - -lbfd -liberty > /dev/null 2>&1 && echo y")
+
+ ifeq ($(has_bfd),y)
+ EXTLIBS += -lbfd
+ else ifeq ($(has_bfd_iberty),y)
+ EXTLIBS += -lbfd -liberty
+ else
+ BASIC_CFLAGS += -DNO_DEMANGLE
+ endif
+endif
+
ifndef CC_LD_DYNPATH
ifdef NO_R_TO_GCC_LINKER
# Some gcc does not accept and pass -R to the linker to specify
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index b4fe057..0580b94 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -6,7 +6,16 @@
#include <libelf.h>
#include <gelf.h>
#include <elf.h>
+
+#ifndef NO_DEMANGLE
#include <bfd.h>
+#else
+static inline
+char *bfd_demangle(void __used *v, const char __used *c, int __used i)
+{
+ return NULL;
+}
+#endif
const char *sym_hist_filter;
--
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