[PATCH 21/22] Define __HAVE_64B_ATOMICS from compiler support

[Adhemerval Zanella Netto]

On 13/11/25 16:18, Florian Weimer wrote:
> * Stefan Liebler:
> 
>> __HAVE_64B_ATOMICS is now defined to 1 on s390 due to new
>> configure-check. Before it was set to 0 in s390-header-file.
> 
> We need to revert that, i386 has the same issue:
> 
> sysdeps/x86/atomic-machine.h-/* Since the Pentium, i386 CPUs have supported 64-bit atomics, but the
> sysdeps/x86/atomic-machine.h-   i386 psABI supplement provides only 4-byte alignment for uint64_t
> sysdeps/x86/atomic-machine.h-   inside structs, so it is currently not possible to use 64-bit
> sysdeps/x86/atomic-machine.h-   atomics on this platform.  */
> sysdeps/x86/atomic-machine.h:# define __HAVE_64B_ATOMICS                0
> 
> Thanks,
> Florian
> 

Alright, it seems the best strategy to avoid breakages. I will revert it.