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[77.11.142.233]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48e74dc9a8fsm48167395e9.15.2026.05.10.22.27.54 for <maintonly@bugs.debian.org> (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 10 May 2026 22:27:54 -0700 (PDT) Sender: Anton Gladky <gladky.anton@gmail.com> Received: by gladklaptop.localdomain (Postfix, from userid 1000) id B9A78F200B5; Mon, 11 May 2026 07:27:53 +0200 (CEST) Subject: mrtrix3: FTBFS with libeigen3-dev 5.0 (major version transition) From: Anton Gladky <gladk@debian.org> To: <maintonly@bugs.debian.org> User-Agent: mail (GNU Mailutils 3.20) Date: Mon, 11 May 2026 07:27:53 +0200 Message-Id: <20260511052753.B9A78F200B5@gladklaptop.localdomain> Delivered-To: maintonly@bugs.debian.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Package: src:mrtrix3 Version: 3.0.8-1 Severity: important Tags: sid forky ftbfs User: debian-devel@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 mrtrix3 FTBFS with libeigen3-dev 5.0.1. The full build log is available at: https://debusine.debian.net/debian/developers-gladk-eigen3/artifact/3758084/ Here is the most probably relevant part of the failing build log: =========================================== Checking for Eigen3 library: ERROR: error compiling Eigen3 application! MRtrix3 was unable to compile a test program involving Eigen3. Set the EIGEN_CFLAGS environment variable to inform 'configure' of the flags it must provide to the compiler in order to compile programs that use Eigen3 functionality; this may include the path to the Eigen3 include files, as well as any required flags. For example: $ export EIGEN_CFLAGS="-isystem /usr/include/eigen3" $./configure (amend with the actual path to the Eigen3 include files on your system) make[1]: *** [debian/rules:36: override_dh_auto_configure] Error 1 make[1]: Leaving directory '/build/reproducible-path/mrtrix3-3.0.8' make: *** [debian/rules:33: 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 -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEu71F6oGKuG/2fnKF0+Fzg8+n/wYFAmoBaNkACgkQ0+Fzg8+n /waNnw/6A4DJykIUsyUInTW9N2YcYM15bAsUaN89Mh4FlvRntQSDFTRRv5pjB8Zp 9ZpMZfXouM0SGlwqRqosC62Bz6FkBtNeV1sVsj8rwfBm8AfDoK5a7ZmWYcHveDlY tewivan2vFHDc4Tu/U2ZDc4qtknatY3FkEm+DTrU2ln3zkY6A7ehMkga+Rhs7fnA PUBIm7zDpI+v2uB1xXihDXSVVSjHsB1VQUwe3MaqChPzecBw4fDoM6wGr+rgilcu rBTMWLMtpblpt5iDVvGqN0oJ1tJO4VHXovoQn+KeuYxy6PKOKLcO5kzpNyQNpqlZ vH1vrcYAKrAEuyn/hS+ByPTdrehVpI5cvZsFBrNVV1khmACMl1Crib1XqsUbc5oO 1100T7RHwLnoCCbqhcEpMoKIfS1RtDHOahpLabGVOdvXlWlWAE39RzvAVLE4GxHS JULVP4pl3qjTxNNwIljiO+QbjLqz3N/qSWwiWbY8rU7E3vbgIVljUiP1q+AwjHhU BDIqoYtqABKsVE5U+gmhWXMFzf8jOXjBl/pZjLpgAa7WUINYeZMPn41Qk+FfCR0u cBbvUSlt3EfKWXz5m6urDzYUCEgKLc9w/Hql5q4ioyZBslIFd7w7vtQ86sIxOel7 913cKSKBBNur0ILJXXcO/hwe/SmDmD455EZm7QWwrqKflidgyG4= =K/a5 -----END PGP SIGNATURE----- ]