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SubjectRe: [PATCH] kbuild: use -Oz instead of -Os when using clang
Hi Matthias,


2017-03-31 1:41 GMT+09:00 Matthias Kaehlcke <mka@chromium.org>:
> El Fri, Mar 31, 2017 at 01:03:02AM +0900 Masahiro Yamada ha dit:
>
>> 2017-03-28 10:19 GMT+09:00 Matthias Kaehlcke <mka@chromium.org>:
>> > This generates smaller resulting object code when compiled with clang.
>> >
>> > Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
>> > ---
>> > Makefile | 3 ++-
>> > 1 file changed, 2 insertions(+), 1 deletion(-)
>> >
>> > diff --git a/Makefile b/Makefile
>> > index b2faa9319372..66bcdbf58371 100644
>> > --- a/Makefile
>> > +++ b/Makefile
>> > @@ -638,7 +638,8 @@ KBUILD_CFLAGS += $(call cc-option,-fdata-sections,)
>> > endif
>> >
>> > ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
>> > -KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
>> > +KBUILD_CFLAGS += $(call cc-option,-Oz,-Os)
>> > +KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
>> > else
>> > ifdef CONFIG_PROFILE_ALL_BRANCHES
>> > KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)
>> >
>>
>>
>>
>> This is the same as the following commit in LLVMLinux
>> except Author/Signed-off-by.
>>
>> Who should the authorship really belong to?
>
> (this time without html, sorry for the noise)
>
> It should belong to Behan, I missed to add a 'From' tag, sorry about
> that. Should I resend with the tag or can you fix it when applying the
> patch?


No need to re-send it. I can fixup it manually.



--
Best Regards
Masahiro Yamada

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