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

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

https://debusine.debian.net/debian/developers-gladk-eigen3/artifact/3761812/

Here is the most probably relevant part of the failing build log:
    ===========================================
common_mpi_catch_main.cc.o -c /build/reproducible-path/sopt-5.0.1+dfsg/cpp/tests/common_mpi_catch_main.cc
In file included from /build/reproducible-path/sopt-5.0.1+dfsg/cpp/sopt/../sopt/wavelets/wavelets.h:5,
                 from /build/reproducible-path/sopt-5.0.1+dfsg/cpp/sopt/wavelets/wavelets.cc:1:
/build/reproducible-path/sopt-5.0.1+dfsg/cpp/sopt/../sopt/types.h:7:10: fatal error: Eigen/Core: No such file or directory
    7 | #include <Eigen/Core>
      |          ^~~~~~~~~~~~
compilation terminated.
make[3]: *** [cpp/sopt/CMakeFiles/sopt.dir/build.make:96: cpp/sopt/CMakeFiles/sopt.dir/wavelets/wavelets.cc.o] Error 1
make[3]: *** Waiting for unfinished jobs....

    ===========================================
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

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
sopt, 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 1136331@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Ole Streicher <olebole@debian.org> (supplier of updated sopt 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: Mon, 21 Sep 2026 16:56:03 +0200
Source: sopt
Architecture: source
Version: 5.0.1+dfsg-2
Distribution: unstable
Urgency: medium
Maintainer: Debian Astro Team <debian-astro-maintainers@lists.alioth.debian.org>
Changed-By: Ole Streicher <olebole@debian.org>
Closes: 1136331
Changes:
 sopt (5.0.1+dfsg-2) unstable; urgency=medium
 .
   * Correct search for eigen3 library (Closes: #1136331)
   * Push Standards-Version to 4.7.4, dh compat to 14; no changes needed
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