Messages in this thread Patch in this message | | | Date | Thu, 21 Apr 2011 16:27:14 -0400 | From | Dave Jones <> | Subject | Re: annoying new gcc 4.6.0 warnings. |
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On Thu, Apr 21, 2011 at 10:08:36PM +0200, Sam Ravnborg wrote:
> My gcc (4.3.2) barfed over -Wno-unused-but-set-variable. > So your patch needs to check if the option is supported.
I don't have a gcc older than 4.4.0. Can you try this ?
Dave --
Disable the new -Wunused-but-set-variable that was added in gcc 4.6.0 It produces more false positives than useful warnings.
This can still be enabled using W=1
Signed-off-by: Dave Jones <davej@redhat.com>
diff --git a/Makefile b/Makefile index b967b96..29e16f2 100644 --- a/Makefile +++ b/Makefile @@ -559,6 +559,8 @@ ifndef CONFIG_CC_STACKPROTECTOR KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) endif +KBUILD_CFLAGS += $(call cc-option, -Wno-unused-but-set-variable) + ifdef CONFIG_FRAME_POINTER KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls else diff --git a/scripts/Makefile.build b/scripts/Makefile.build index d5f925a..30627ab 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -79,6 +79,7 @@ KBUILD_EXTRA_WARNINGS += -Wpointer-arith KBUILD_EXTRA_WARNINGS += -Wredundant-decls KBUILD_EXTRA_WARNINGS += -Wshadow KBUILD_EXTRA_WARNINGS += -Wswitch-default +KBUILD_EXTRA_WARNINGS += -Wunused-but-set-variable KBUILD_EXTRA_WARNINGS += $(call cc-option, -Wvla,) KBUILD_CFLAGS += $(KBUILD_EXTRA_WARNINGS) endif
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