[Debian-med-packaging] Bug#1136241: iqtree3: FTBFS with libeigen3-dev 5.0 (major version transition)

[Anton Gladky]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Package: src:iqtree3
Version: 3.1.1+dfsg-1
Severity: important
Tags: sid forky ftbfs
User: debian-devel at lists.debian.org
Usertags: eigen3-5.0

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

iqtree3 FTBFS with libeigen3-dev 5.0.1. The full build log is available at:

  https://debusine.debian.net/debian/developers-gladk-eigen3/artifact/3756398/

Here is the most probably relevant part of the failing build log:
    ===========================================
- -- Detecting CXX compile features - done
CMake Error at CMakeLists.txt:93 (message):
  Eigen3 library not found.  Either install it or rerun cmake with
  -DEIGEN3_INCLUDE_DIR=<installed_eigen3_dir>


- -- Configuring incomplete, errors occurred!
	cd build.omp && tail -v -n \+0 CMakeCache.txt
==> CMakeCache.txt <==
# This is the CMakeCache file.

    ===========================================
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
-----BEGIN PGP SIGNATURE-----
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=S6aW
-----END PGP SIGNATURE-----