Dear maintainer,

As part of the 64-bit time_t transition required to support 32-bit
architectures in 2038 and beyond
(https://wiki.debian.org/ReleaseGoals/64bit-time), we have identified
glibmm2.68 as a source package shipping runtime libraries whose ABI
either is affected by the change in size of time_t, or could not be
analyzed via abi-compliance-checker (and therefore to be on the safe
side we assume is affected).

To ensure that inconsistent combinations of libraries with their
reverse-dependencies are never installed together, it is necessary to
have a library transition, which is most easily done by renaming the
runtime library package.

Since turning on 64-bit time_t is being handled centrally through a change
to the default dpkg-buildflags (https://bugs.debian.org/1037136), it is
important that libraries affected by this ABI change all be uploaded close
together in time.  Therefore I have prepared a 0-day NMU for glibmm2.68
which will initially be uploaded to experimental if possible, then to
unstable after packages have cleared binary NEW.

Please find the patch for this NMU attached.

If you have any concerns about this patch, please reach out ASAP.  Although
this package will be uploaded to experimental immediately, there will be a
period of several days before we begin uploads to unstable; so if information
becomes available that your package should not be included in the transition,
there is time for us to amend the planned uploads.

It feels easiest to me to do the uploads to Unstable for the Debian
GNOME packages. We had pending changes in git for some of them. Even
when we didn't, I still need to do manual pushing to git repos for
NMUs. Therefore, I am unsetting the pending tag as suggested by Steve
today in #debian-release.

Thank you,
Jeremy Bícha

Please see attached a patch rebased on current unstable.

We believe that the bug you reported is fixed in the latest version of
glibmm2.68, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1062137@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Jeremy Bícha <jbicha@ubuntu.com> (supplier of updated glibmm2.68 package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Tue, 27 Feb 2024 21:49:12 -0500
Source: glibmm2.68
Built-For-Profiles: noudeb
Architecture: source
Version: 2.78.1-2
Distribution: unstable
Urgency: medium
Maintainer: Debian GNOME Maintainers <pkg-gnome-maintainers@lists.alioth.debian.org>
Changed-By: Jeremy Bícha <jbicha@ubuntu.com>
Closes: 1062137
Changes:
 glibmm2.68 (2.78.1-2) unstable; urgency=medium
 .
   * Release to unstable (Closes: #1062137)
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