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Drop libopenmpi3 from CI apt installs (Ubuntu 26.04) - #1763

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libopenmpi3-ubuntu26-1762
Nov 6, 2026
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amjjbonvin merged 1 commit into
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libopenmpi3-ubuntu26-1762

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What does this PR do and why?

Removes libopenmpi3 from the apt-get install lines in ci.yml (2x) and pages.yml. ubuntu-latest is now Ubuntu 26.04, which no longer ships that package, so CI and docs deployment fail. libopenmpi-dev pulls in the runtime library, as in our Dockerfile.

How was this tested?

By the CI run of this PR (Linux jobs install OpenMPI and run the MPI tests).

AI assistance

Diagnosis and change made with Claude Code; verified against the failing CI logs.

Checklist

  • Tests cover the new and/or changed code
  • Documentation updated if needed (also in the haddock3 user-manual
  • CHANGELOG.md updated for user-facing changes

Related issues

Closes #1762

Notes for reviewers

CI-only change, not user-facing.

🤖 Generated with Claude Code

Ubuntu 26.04 runners no longer provide libopenmpi3; libopenmpi-dev
pulls in the runtime library.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
@amjjbonvin amjjbonvin added bug Something isn't working CI / repository Continuous integration or repository organization AI Changes authored or assisted by AI labels Nov 6, 2026
@amjjbonvin amjjbonvin self-assigned this Nov 6, 2026
@amjjbonvin
amjjbonvin merged commit 0415953 into main Nov 6, 2026
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@amjjbonvin
amjjbonvin deleted the libopenmpi3-ubuntu26-1762 branch November 6, 2026 16:46
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CI fails on Ubuntu 26.04 runners: libopenmpi3 package not found

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