On Thu, Apr 12, 2012 at 12:57:57PM -0700, Andi Kleen wrote:
>
>>> You should try cc-diasable-warning like this:
>>>
>>> KBUILD_CFLAGS += $(call cc-disable-warning, ipa-cp-clone)
>> That works, thanks!
>> Andi, does it still work as expected for you?
>
> No, unfortunately it doesn't enable the flag with my compiler.
> Also BTW ipa-cp-clone is not a warning, it's an optimization pass.
Yeah I see now.
cc-disable-warning only works on warnings - which starts with -W
Could you try this:
cc-disable-opt = $(call try-run,\
$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -f$(strip $(1)) -c -xc /dev/null -o "$$TMP",-fno-$(strip $(1)))
KBUILD_CFLAGS += $(call cc-disable-opt, ipa-cp-clone)
It will try if "gcc -fipa-cp-clone" is supported,
and add -fno-ipa-cp-clone in that case.
Sam
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