Re: s390x: removal of 31-bit libraries

From	Sebastian Ramacher <sramacher@debian.org>
Newsgroups	linux.debian.ports.s390, linux.debian.maint.glibc, linux.debian.kernel, linux.debian.devel.release
Subject	Re: s390x: removal of 31-bit libraries
Date	2026-06-10 08:30 +0200
Message-ID	<N4kBQ-bIeY-3@gated-at.bofh.it> (permalink)
References	<M7ko9-6x5Z-1@gated-at.bofh.it> <MOLZo-ZPX-3@gated-at.bofh.it> <MOTNg-14Vf-5@gated-at.bofh.it> <N2Hjb-azfT-3@gated-at.bofh.it> <N4iTn-bGZH-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 4 groups.

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On 2026-06-10 06:38:03 +0200, Aurelien Jarno wrote:
> Hi,
> 
> On 2026-06-05 20:13, Aurelien Jarno wrote:
> > Hi,
> > 
> > A small status update.
> > 
> > On 2026-04-28 18:47, Aurelien Jarno wrote:
> > > Hi,
> > > 
> > > On 2026-04-28 10:22, Sebastian Ramacher wrote:
> > > > Hi
> > > > 
> > > > On 2025-12-29 13:12:48 +0100, Aurelien Jarno wrote:
> > > > > Hi,
> > > > > 
> > > > > Linux 6.19 will drop support for 31-bit compatibility on s390x, and will 
> > > > > also stop providing 31-bit support in UAPI header files [1]. Once this 
> > > > > lands in unstable, it will become impossible to build the libc6-s390 and 
> > > > > libc6-dev-s390 packages on s390x. We should therefore stop building 
> > > > > these packages, as well as g++-15-multilib and the corresponding lib32* 
> > > > > libraries.
> > > > > 
> > > > > Doing so will break many packages. I therefore suggest that, over the 
> > > > > next few weeks, we start removing 31-bit support in all packages except 
> > > > > src:gcc-15, src:gcc-defaults, src:glibc, src:linux and src:zlib (and 
> > > > > possibly the corresponding cross compilers?). Then in a final 
> > > > > coordinated step, we can fully drop 31-bit support from those remaining 
> > > > > packages as well.
> > > > > 
> > > > > Any thoughts about that? Volunteers to coordinate this? 
> > > > 
> > > > If I am reading dak output correctly, we are down to gcc-11, gcc-13,
> > > > gcc-14, gcc-15, zlib, and glibc itself. So assuming that I didn't miss
> > > > anything, are we there to also drop the support from these packages?
> > > 
> > > These packages have already been fixed, but they are kept as cruft in 
> > > sid (but not in forky). I have not investigated why, it could just be 
> > > that dak is not smart enough.
> > 
> > All the cross packages got removed. gcc-1[1-4] also got removed.
> > 
> > > In addition llvm-toolchain-{14,19,20} are still waiting for a fix [1], 
> > > but they are only in sid or experimental.
> > 
> > llvm-toolchain-14 is also gone, for all architectures.
> > 
> > For dependencies, we are left with only gcc-15, gcc-defaults, zlib and 
> > glibc, I'll work on filling the corresponding bugs against 
> > ftp.debian.org as the next step.
> 
> This is now done. A bit thanks to Thorsten Alteholz for handling all the 
> removal request. This means we do not have 31-bit s390 binaries anymore 
> in testing or unstable \o/.
> 
> Release team members, I guess that with done, the "s390-31-bit-rm" 
> transition can be remove from the tracker.

Thanks for driving this removal. I have removed the trackers.

Cheers
-- 
Sebastian Ramacher

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Thread

s390x: removal of 31-bit libraries Aurelien Jarno <aurel32@debian.org> - 2025-12-29 13:20 +0100
  Re: s390x: removal of 31-bit libraries Sebastian Ramacher <sramacher@debian.org> - 2026-04-28 10:30 +0200
    Re: s390x: removal of 31-bit libraries Aurelien Jarno <aurel32@debian.org> - 2026-04-28 18:50 +0200
      Re: s390x: removal of 31-bit libraries Aurelien Jarno <aurel32@debian.org> - 2026-06-05 20:20 +0200
        Re: s390x: removal of 31-bit libraries Aurelien Jarno <aurel32@debian.org> - 2026-06-10 06:40 +0200
          Re: s390x: removal of 31-bit libraries Sebastian Ramacher <sramacher@debian.org> - 2026-06-10 08:30 +0200

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