On Fri, Sep 02, 2022 at 08:43:49AM +0000, Christophe Leroy wrote:
> Le 01/09/2022 à 21:47, Segher Boessenkool a écrit :
> > On Thu, Sep 01, 2022 at 05:41:33AM +0000, Christophe Leroy wrote:
> >> I think it would be worth a GCC bug report.
> >
> > We need a stand-alone testcase for this. When you have created one, at
> > least 98% of the time you discover the bug is in user code after all.
> >
> > Which is a very good thing, it means the problem can be fixed simpler,
> > cheaper, and a lot faster :-)
>
> Easy to reproduce with a .c file that has a single line:
>
> non_existing_macro(xxx);
That was fast (and cheap and simple) :-)
> Apparently that's due to the -w option in arch/powerpc/math_emu/Makefile:
>
> ccflags-y = -w
>
> Was introduced by commit d2b194ed8208 ("powerpc/math-emu: Use kernel
> generic math-emu code")
>
> If I understand correctly it means 'ignore all warnings'. Then it seems
> CLANG doesn't honor that request.
'-w'
Inhibit all warning messages.
GCC's initial commit has this already (1992).
Segher
