[natalie-perlin]

Use of generative AI

• I confirm that this contribution was submitted by a real person. If AI tools or agents were used in its preparation, I have personally reviewed and take responsibility for all submitted content, code, and proposed changes. This contribution is not autonomously generated by AI.

Description

New compiler+mpi added to Ursa to support use of GPUs:
Recently updated nvhpc/26.9 module built with OpenMPI 5.0.10rc2, and cuda/13.3 built with gcc@11.5 (system version)

Dependencies

If there are PRs that need to be merged before or along with this one, please add "- [ ] waiting on LINK_TO_PR" for each of them.

Issues addressed

Addresses issue #2200 #2200

Applications affected

List all known applications (UFS WM, JEDI, SRW, etc.) intentionally or unintentionally affected by this PR.

Systems affected

Ursa

Testing

• CI: Note whether the automatic tests (GitHub actions tests that run automatically for every commit) pass or not
  • GitHub actions CI tests pass
  • GitHub actions CI tests do not pass (provide explanation)
  • GitHub actions CI tests skipped (provide explanation if necessary)
• New tests added: List and describe any new tests added to GitHub actions
  • ...
• Additional testing: Add information on any additional tests conducted
  • ...

Checklist

• This PR addresses one issue/problem/enhancement or has a very good reason for not doing so.
• These changes have been tested on the affected systems and applications.
• All dependency PRs/issues have been resolved and this PR can be merged.
• All necessary updates to the documentation (spack-stack wiki) will be made when this PR is merged

[climbfuji]

This change is already in release/2.2 - just a reminder for me to resolve the conflict, depending on what goes into develop first (this PR or the release branch).