Deprecation of s390-32 in glibc

[Florian Weimer]

* Andreas K. Huettel:

>> 
>> Potentially you don't need to wait that long, or even do such a managed
>> turn down, and you can rip this out in 2.43 release already.
>> 
>> Ubuntu 24.04 released last year has COMPAT turned off for s390x. In plucky
>> (or earlier) libc-s390 was stopped building.
>> And I see Centos stream 10 also has COMPAT turned off for s390x. Commit
>> message suggests that libc-s390 is not built/provided.
>> Debian just had a release with glibc 2.41, and next Debian release is
>> unlikely to have s390 port anymore.
>> 
>> So far nobody screamed. I have tried to trace down any potential still
>> useful s390 only applications, which only turned up very old db versions,
>> which is not clear if they can even run anymore. Upon request to find out
>> if anybody is still using them and/or expects to be able to compile or run
>> them turned up crickets.
>> 
>> 31bit support is already dead in all distros.
>
> Ahem. Gentoo here. We exist and still support it.
>
> However, that doesn't mean it has to linger even longer.

Red Hat still supports it as well, but only in older RHEL versions.  We
can keep the support going for a while even if 31-bit s390 is removed
from the glibc upstream sources.

Thanks,
Florian