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);
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.
Christophe
