Re: Bug#1105110: python3.14 FTBFS on m68k: Assertion `!PyStackRef_IsTaggedInt(ref)' failed

[Laurent Vivier <laurent@vivier.eu>]

Le 14/05/2025 à 10:45, John Paul Adrian Glaubitz a écrit :
> Hi Laurent,
>
> On Wed, 2025-05-14 at 10:10 +0200, Laurent Vivier wrote:
> > You can use __alignof__() to have the data type alignment:
> >
> >       int main(void)
> >       {
> >               printf("alignof(short) %ld\n", __alignof__(short));
> >               printf("alignof(int) %ld\n", __alignof__(int));
> >               printf("alignof(long) %ld\n", __alignof__(long));
> >               printf("alignof(long long) %ld\n", __alignof__(long long));
> >       }
> >
> > On x86_64, it gives:
> >
> > alignof(short) 2
> > alignof(int) 4
> > alignof(long) 8
> > alignof(long long) 8
>
> Is alignof() supported in ancient versions of GCC and the Sun compiler?

Since GCC 2.x (1992)

https://gcc.gnu.org/onlinedocs/gcc-2.95.3/gcc_4.html#SEC89

It's a gcc extension.

For other compilers, we need to use _Alignof() from C11.

Thanks,
Laurent