[natalie-perlin]

Use of generative AI

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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)

The changes made to this repository and a dependency (JCSDA/spack-packages#107)
are tested successfully to build an environment for the UFS WM (module ufs-weather-model-env). All the modules and meta-modules are created successfully:

Currently Loaded Modules:
  1) spack-apps/2026.10         18) cprnc/1.0.8                35) libpng/1.6.55
  2) nvhpc/26.9                 19) crtm-fix/3.1.2.0           36) w3emc/2.13.0
  3) stack-nvhpc/26.9           20) crtm/3.1.5                 37) g2/3.5.1
  4) stack-openmpi/5.0.10rc2    21) parallel-netcdf/1.14.1     38) g2tmpl/1.17.0
  5) cuda/13.3                  22) parallelio/2.6.2           39) gftl/1.17.0
  6) glibc/2.34                 23) sqlite/3.53.1              40) gftl-shared/1.12.0
  7) kokkos-nvcc-wrapper/5.1.1  24) python/3.13.13             41) ip/5.4.0-noopenmp
  8) kokkos/5.1.1               25) python-venv/1.0            42) kokkos-kernels/5.1.1
  9) arborx/2.1                 26) py-mpi4py/4.1.1            43) fargparse/1.11.0
 10) bacio/2.6.0                27) py-numpy/2.4.6             44) udunits/2.2.28
 11) nghttp2/1.67.1             28) py-pip/26.1                45) mapl/2.69.1-esmf-9.0.0b17
 12) zlib/1.2.13                29) libyaml/0.2.5              46) nccmp/1.9.0.1
 13) curl/8.20.0                30) py-pyyaml/6.0.3            47) scotch/7.0.10
 14) cmake/3.31.11              31) esmf/9.0.0b17              48) yaml-cpp/0.8.0
 15) hdf5/2.1.0                 32) fms/2025.03-gfs-constants  49) ufs-weather-model-env/1.0.0
 16) netcdf-c/4.9.2             33) libjpeg/3.1.3
 17) netcdf-fortran/4.6.1       34) jasper/4.2.8

Dependencies

Recipe updates and patches for nvhpc:

JCSDA/spack-packages#107

Issues addressed

Addresses issue #2200 #2200

Applications affected

UFS ATM and UFS WM for GPU support

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