From: Arnaldo Carvalho de Melo on
From: Masami Hiramatsu <mhiramat(a)>

Add NO_DWARF make option for testing build without libdw.

Signed-off-by: Masami Hiramatsu <mhiramat(a)>
Cc: Ingo Molnar <mingo(a)>
Cc: Frederic Weisbecker <fweisbec(a)>
Cc: Paul Mackerras <paulus(a)>
Cc: Mike Galbraith <efault(a)>
Cc: Peter Zijlstra <a.p.zijlstra(a)>
Signed-off-by: Arnaldo Carvalho de Melo <acme(a)>
tools/perf/Makefile | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index c991818..6903645 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -150,6 +150,8 @@ all::
# Define LDFLAGS=-static to build a static binary.
# Define EXTRA_CFLAGS=-m64 or EXTRA_CFLAGS=-m32 as appropriate for cross-builds.
+# Define NO_DWARF if you do not want debug-info analysis feature at all.

@@ -507,10 +509,12 @@ endif
ifneq ($(shell sh -c "(echo '\#include <dwarf.h>'; echo '\#include <libdw.h>'; echo 'int main(void) { Dwarf *dbg; dbg = dwarf_begin(0, DWARF_C_READ); return (long)dbg; }') | $(CC) -x c - $(ALL_CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/elfutils -ldw -lelf -o $(BITBUCKET) $(ALL_LDFLAGS) $(EXTLIBS) "$(QUIET_STDERR)" && echo y"), y)
msg := $(warning No libdw.h found or old libdw.h found, disables dwarf support. Please install elfutils-devel/elfutils-dev);
+ifndef NO_DWARF
BASIC_CFLAGS += -I/usr/include/elfutils -DDWARF_SUPPORT
EXTLIBS += -lelf -ldw
LIB_OBJS += util/probe-finder.o

ifneq ($(shell sh -c "(echo '\#include <newt.h>'; echo 'int main(void) { newtInit(); newtCls(); return newtFinished(); }') | $(CC) -x c - $(ALL_CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -lnewt -o $(BITBUCKET) $(ALL_LDFLAGS) $(EXTLIBS) "$(QUIET_STDERR)" && echo y"), y)
msg := $(warning newt not found, disables TUI support. Please install newt-devel or libnewt-dev);

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