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Date:	Sat, 24 Oct 2009 01:03:55 GMT
From:	tip-bot for Steven Rostedt <>
Subject: [tip:branch?] perf tools: Add 'make DEBUG=1' to remove the -O6 cflag

Commit-ID:  60d526f7fa6246b8e32d5b45610d625a5608d988
Author:     Steven Rostedt <>
AuthorDate: Tue, 20 Oct 2009 19:19:34 -0400
Committer:  Ingo Molnar <>
CommitDate: Wed, 21 Oct 2009 13:39:57 +0200

perf tools: Add 'make DEBUG=1' to remove the -O6 cflag

When using gdb to debug perf, it is practically impossible to
use when perf is compiled with -O6. For developers, this patch
adds the DEBUG feature to the make command line so that a
developer can easily remove the optimization flag.

LKML-Reference: <1255590330.8392.446.camel@...ns>
Signed-off-by: Steven Rostedt <>
Cc: Peter Zijlstra <>
Cc: Frederic Weisbecker <>
Cc: Arnaldo Carvalho de Melo <>
LKML-Reference: <>
Signed-off-by: Ingo Molnar <>
 tools/perf/Makefile |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 64c6b7b..65e6e52 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -201,7 +201,14 @@ EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wold-style-definition
 EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wstrict-prototypes
 EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wdeclaration-after-statement
-CFLAGS = $(MBITS) -ggdb3 -Wall -Wextra -std=gnu99 -Werror -O6 -fstack-protector-all -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS)
+ifeq ("$(origin DEBUG)", "command line")
+ifndef PERF_DEBUG
+CFLAGS = $(MBITS) -ggdb3 -Wall -Wextra -std=gnu99 -Werror $(CFLAGS_OPTIMIZE) -fstack-protector-all -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS)
 LDFLAGS = -lpthread -lrt -lelf -lm
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