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

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

https://debusine.debian.net/debian/developers-gladk-eigen3/artifact/3757436/

Here is the most probably relevant part of the failing build log:
    ===========================================
-- Found OpenMP_CXX: -fopenmp (found version "4.5")
CMake Error at src/cmake/meshlab_tools.cmake:93 (_message):
  Eigen is required - at least one of VCG_ALLOW_SYSTEM_EIGEN or
  VCG_ALLOW_BUNDLED_EIGEN must be enabled and found.
Call Stack (most recent call first):
  src/vcglib/CMakeLists.txt:42 (message)

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
meshlab, 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 1136248@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Anton Gladky <gladk@debian.org> (supplier of updated meshlab 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, 15 Oct 2026 09:30:52 +0200
Source: meshlab
Architecture: source
Version: 2025.07~dfsg-3
Distribution: unstable
Urgency: medium
Maintainer: Debian Science Team <debian-science-maintainers@lists.alioth.debian.org>
Changed-By: Anton Gladky <gladk@debian.org>
Closes: 1136248
Changes:
 meshlab (2025.07~dfsg-3) unstable; urgency=medium
 .
   * Team upload.
   * Support Eigen 5: derive EIGEN3_INCLUDE_DIR from Eigen3::Eigen.
     (Closes: #1136248)
   * Accept system GLEW found via its CMake config file.
   * Bump Standards-Version to 4.7.4, debhelper-compat to 14,
     drop Priority (cme fix dpkg).
   * d/watch: fix Dversionmangle for the ~dfsg suffix.
   * d/salsa-ci.yml: use the debian.yml recipe, enable licenserecon.
   * Drop duplicate d/.gitlab-ci.yml.
   * d/copyright: update, drop old FSF address; add d/lrc.config.
   * Drop unused lintian override.
   * Add superficial autopkgtest.
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Files:
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 872e8e493855e33d322d50ff3913c47a 28192 graphics optional meshlab_2025.07~dfsg-3.debian.tar.xz
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Git-Tag-Info: tag=deab9420f82e6605d4eafdc88038b0c36901e46b fp=bbbd45ea818ab86ff67e7285d3e17383cfa7ff06
Git-Tag-Tagger: Anton Gladky <gladk@debian.org>
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