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authorJean Delvare <jdelvare@suse.de>2012-10-02 16:42:36 +0200
committerBen Hutchings <ben@decadent.org.uk>2012-10-17 03:49:27 +0100
commit6454738d4395c8a79843f5c2e3eeb687f9b7e7a9 (patch)
tree3861c4a8f9f0b67d013ae89e864fd7138ffbd739 /tools/perf
parentd3ccc5b382bf183ad55096743e4fa42d432b9885 (diff)
kbuild: Fix gcc -x syntax
commit b1e0d8b70fa31821ebca3965f2ef8619d7c5e316 upstream. The correct syntax for gcc -x is "gcc -x assembler", not "gcc -xassembler". Even though the latter happens to work, the former is what is documented in the manual page and thus what gcc wrappers such as icecream do expect. This isn't a cosmetic change. The missing space prevents icecream from recognizing compilation tasks it can't handle, leading to silent kernel miscompilations. Besides me, credits go to Michael Matz and Dirk Mueller for investigating the miscompilation issue and tracking it down to this incorrect -x parameter syntax. Signed-off-by: Jean Delvare <jdelvare@suse.de> Acked-by: Ingo Molnar <mingo@kernel.org> Cc: Bernhard Walle <bernhard@bwalle.de> Cc: Michal Marek <mmarek@suse.cz> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Michal Marek <mmarek@suse.cz> [bwh: Backported to 3.2: drop unneeded change to arch/x86/Makefile] Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index b98e3075646..e45d2b12699 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -56,7 +56,7 @@ ifeq ($(ARCH),x86_64)
ARCH := x86
IS_X86_64 := 0
ifeq (, $(findstring m32,$(EXTRA_CFLAGS)))
- IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -xc - | tail -n 1)
+ IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -x c - | tail -n 1)
endif
ifeq (${IS_X86_64}, 1)
RAW_ARCH := x86_64