diff options
| author | Jean Delvare <jdelvare@suse.de> | 2012-10-02 16:42:36 +0200 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-10-17 03:49:27 +0100 |
| commit | 6454738d4395c8a79843f5c2e3eeb687f9b7e7a9 (patch) | |
| tree | 3861c4a8f9f0b67d013ae89e864fd7138ffbd739 /tools | |
| parent | d3ccc5b382bf183ad55096743e4fa42d432b9885 (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')
| -rw-r--r-- | tools/perf/Makefile | 2 | ||||
| -rw-r--r-- | tools/power/cpupower/Makefile | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile index b98e3075646b..e45d2b12699d 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 diff --git a/tools/power/cpupower/Makefile b/tools/power/cpupower/Makefile index e8a03aceceb1..7db8da5a7864 100644 --- a/tools/power/cpupower/Makefile +++ b/tools/power/cpupower/Makefile @@ -100,7 +100,7 @@ GMO_FILES = ${shell for HLANG in ${LANGUAGES}; do echo po/$$HLANG.gmo; done;} export CROSS CC AR STRIP RANLIB CFLAGS LDFLAGS LIB_OBJS # check if compiler option is supported -cc-supports = ${shell if $(CC) ${1} -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; fi;} +cc-supports = ${shell if $(CC) ${1} -S -o /dev/null -x c /dev/null > /dev/null 2>&1; then echo "$(1)"; fi;} # use '-Os' optimization if available, else use -O2 OPTIMIZATION := $(call cc-supports,-Os,-O2) |