This is a note to let you know that I've just added the patch titled
perf tools: Add 'make DEBUG=1' to remove the -O6 cflag
to the 2.6.32-longterm tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/longterm/longterm-queue-2.6.32.git;a=summary
The filename of the patch is:
perf-tools-add-make-debug-1-to-remove-the-o6-cflag.patch
and it can be found in the queue-2.6.32 subdirectory.
If you, or anyone else, feels it should not be added to the 2.6.32 longterm
tree,
please let <[email protected]> know about it.
>From 44f6b761aa500d96f7d948d0ab0c812eeb75882a Mon Sep 17 00:00:00 2001
From: Steven Rostedt <[email protected]>
Date: Tue, 20 Oct 2009 19:19:34 -0400
Subject: perf tools: Add 'make DEBUG=1' to remove the -O6 cflag
From: Steven Rostedt <[email protected]>
commit 60d526f7fa6246b8e32d5b45610d625a5608d988 upstream.
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@twins>
Signed-off-by: Steven Rostedt <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
[bwh: Backport to 2.6.32]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
tools/perf/Makefile | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -200,7 +200,14 @@ EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wol
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")
+ PERF_DEBUG = $(DEBUG)
+endif
+ifndef PERF_DEBUG
+ CFLAGS_OPTIMIZE = -O6
+endif
+
+CFLAGS = $(MBITS) -ggdb3 -Wall -Wextra -std=gnu99 -Werror $(CFLAGS_OPTIMIZE)
-fstack-protector-all -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS)
LDFLAGS = -lpthread -lrt -lelf -lm
ALL_CFLAGS = $(CFLAGS)
ALL_LDFLAGS = $(LDFLAGS)
Patches currently in longterm-queue-2.6.32 which might be from
[email protected] are
/home/gregkh/linux/longterm/longterm-queue-2.6.32/queue-2.6.32/perf-tools-add-make-debug-1-to-remove-the-o6-cflag.patch
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