diff options
| author | Jean Delvare <jdelvare@suse.de> | 2012-10-02 16:42:36 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-13 05:38:37 +0900 |
| commit | 4893cf612a68d26cdbe0e16ba9c42772136e2340 (patch) | |
| tree | b057aa6eda3d88d158efcb9fc5389c928d1387be /tools/perf | |
| parent | f15977883584e7b52832518c3fef115957d3203b (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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile index 92271d32bc30..c3dd3d4424fe 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -70,7 +70,7 @@ 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 |