#1136332 spectra: FTBFS with libeigen3-dev 5.0 (major version transition)

Package:
src:spectra
Source:
src:spectra
Submitter:
Anton Gladky
Date:
2026-07-23 20:27:03 UTC
Severity:
normal
Tags:
#1136332#5
Date:
2026-05-11 21:00:13 UTC
From:
To:
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

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

https://debusine.debian.net/debian/developers-gladk-eigen3/artifact/3761837/

Here is the most probably relevant part of the failing build log:
    ===========================================
#1136332#10
Date:
2026-07-23 20:25:47 UTC
From:
To:
Hi,

The attached patches fix this bug, I will upload a new version with them
as soon as Eigen 5.x reaches unstable.

Best wishes,
#1136332#17
Date:
2026-07-23 20:26:55 UTC
From:
To:
Also with this third one, attached, sorry.