Deprecation of s390-32 in glibc

[Dimitri John Ledkov]

On Thu, 11 Dec 2025, 17:15 Andreas K. Huettel, <dilfridge@gentoo.org> wrote:
>
> >
> > 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.


Oh! Please forgive me. I didn't know you have support for s390, now I
do - very cool. I am very new to IBM Z and when I had to bootstrap it
for Ubuntu it somehow seemed to me that only Debian, RedHat & Friends,
and Suse & Friends had s390x support.

Is there a kernel config or libc config that is known to be used by
Gentoo s390 users? Or is it hard to tell / unknown if people turn on
CONFIG_COMPAT, build glibc multilib support, and are actively using
that on s390x capable hardware?


>
> >
> > Regards,
> >
> > Dimitri.
> >
>
>
> --
> Andreas K. Hüttel
> dilfridge@gentoo.org
> Gentoo Linux developer
> (council, toolchain, base-system, perl, libreoffice)