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    SubjectRe: annoying new gcc 4.6.0 warnings.
    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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