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

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