Re: [PATCH] kbuild: use -Oz instead of -Os when using clang

[Matthias Kaehlcke]

Hi Masahiro,

El Fri, Mar 31, 2017 at 02:57:43AM +0900 Masahiro Yamada ha dit:

> 2017-03-31 1:41 GMT+09:00 Matthias Kaehlcke <mka@xxxxxxxxxxxx>:
> > 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@xxxxxxxxxxxx>:
> >> > This generates smaller resulting object code when compiled with clang.
> >> >
> >> > Signed-off-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
> >> > ---
> >> >  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.

I couldn't locate this patch in your tree, has it been picked up?

Thanks

Matthias