Dear Maintainer,

your package depends on libeigen3-dev. The upstream released a
new major version of this mathematical library, 5.0.0. Some
basic information about new features and changes in this version
can be found here:

https://libeigen.gitlab.io/releases/5.0/

This is a major version change and may require code changes in packages
depending on eigen3. The key breaking changes include:

  - Minimum required C++ standard is now C++14
  - Changes in the build system integration
  - Some API name changes

gudhi FTBFS with libeigen3-dev 5.0.1. The full build log is available at:

https://debusine.debian.net/debian/developers-gladk-eigen3/artifact/3756250/raw/gudhi_3.11.0+dfsg-2_amd64-2026-05-08T09:15:48Z.build

Here is the most probably relevant part of the failing build log:
    ===========================================
writing manifest file 'gudhi.egg-info/SOURCES.txt'
removing '../../../../debian/tmp/usr/lib/python3/dist-packages/gudhi-3.11.0.egg-info' (and everything under it)
Copying gudhi.egg-info to ../../../../debian/tmp/usr/lib/python3/dist-packages/gudhi-3.11.0.egg-info
Skipping SOURCES.txt
running install_scripts
mv debian/tmp/usr/bin/Nerve \
   debian/tmp/usr/bin/gudhi-nerve
mv debian/tmp/usr/bin/VoronoiGIC \
   debian/tmp/usr/bin/gudhi-voronoi-gic
mv debian/tmp/usr/bin/Witness_complex_strong_witness_persistence \
   debian/tmp/usr/bin/gudhi-witness-complex-strong-witness-persistence
mv: cannot stat 'debian/tmp/usr/bin/Witness_complex_strong_witness_persistence': No such file or directory
make[1]: *** [debian/rules:80: override_dh_auto_install-arch] Error 1
make[1]: Leaving directory '/build/reproducible-path/gudhi-3.11.0+dfsg'
make: *** [debian/rules:36: binary-arch] Error 2
dpkg-buildpackage: error: debian/rules binary-arch subprocess failed with exit status 2

    ===========================================
libeigen3-dev_5.0.1-1 is available in experimental.

When this package version lands into unstable (probably at the beginning
of June 2026), this bug will be increased in severity to serious.

Thanks,

Anton

control: tags -1 + patch

Hello,

This patch solves the FTBFS with eigen3-5.0:

https://github.com/GUDHI/gudhi-devel/pull/1261/changes#diff-c33b3765a598f8117c0b98c0ece21f1570d1b0e86094d4bd0e2ea5261d38bdae

I did not check whether the patch indeed makes gudhi compatible with
both eigen3 << 5.0 and eigen3 >= 5.0.

Andrius

Dear maintainers,

eigen3 5.0 (libeigen3-dev 5.0) is now in unstable, so these FTBFS bugs are
release-critical.  I am therefore raising their severity to serious.

Regards,

Anton

We believe that the bug you reported is fixed in the latest version of
gudhi, 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 1136238@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Gard Spreemann <gspr@nonempty.org> (supplier of updated gudhi 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: Thu, 24 Sep 2026 11:14:21 +0200
Source: gudhi
Architecture: source
Version: 3.12.0+dfsg-1
Distribution: unstable
Urgency: medium
Maintainer: Gard Spreemann <gspr@nonempty.org>
Changed-By: Gard Spreemann <gspr@nonempty.org>
Closes: 1136238
Changes:
 gudhi (3.12.0+dfsg-1) unstable; urgency=medium
 .
   * New upstream version. (Closes: #1136238)
   * Build all Python versions together.
   * Refresh patches.
   * Update dependencies.
   * Standards-version 4.7.4.0. No changes needed.
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