On Sun, Nov 08, 2009 at 01:27:39PM +0100, Ingo Molnar wrote:
> Mind resending the patch against latest -tip?
Not a problem. Attached.
Cheers
Michael.
>From df1a596909b30c9792e55acc731c2578b71d2670 Mon Sep 17 00:00:00 2001
From: Michael Cree <mcree@xxxxxxxxxxxx>
Date: Tue, 10 Nov 2009 22:20:37 +1300
Subject: [PATCH] Test -fstack-protector-all compiler option for inclusion in CFLAGS
Some architectures (e.g. Alpha) do not support the -fstack-protector-all
compiler option and the use of the option with -Werror causes the compiler
to abort. Test that the compiler supports -fstack-protector-all before
inclusion in CFLAGS.
Signed-off-by: Michael Cree <mcree@xxxxxxxxxxxx>
---
tools/perf/Makefile | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 64e5107..cd42c97 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -207,7 +207,7 @@ 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)
+CFLAGS = $(MBITS) -ggdb3 -Wall -Wextra -std=gnu99 -Werror $(CFLAGS_OPTIMIZE) -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS)
LDFLAGS = -lpthread -lrt -lelf -lm
ALL_CFLAGS = $(CFLAGS)
ALL_LDFLAGS = $(LDFLAGS)
@@ -259,6 +259,9 @@ PTHREAD_LIBS = -lpthread
# explicitly what architecture to check for. Fix this up for yours..
SPARSE_FLAGS = -D__BIG_ENDIAN__ -D__powerpc__
+ifeq ($(shell sh -c "echo 'int foo(void) {char X[2]; return 3;}' | $(CC) -x c -c -Werror -fstack-protector-all - -o /dev/null >/dev/null 2>&1 && echo y"), y)
+ CFLAGS := $(CFLAGS) -fstack-protector-all
+endif
### --- END CONFIGURATION SECTION ---
--
1.6.3.3
