Testing MOM5 build changes

[dougiesquire]

This is a temporary PR for testing changes to the MOM5 build system

[dougiesquire]

!test repro

[github-actions]

✅ The Bitwise Reproducibility Check Succeeded ✅

When comparing:

• test-mom5-cmake-1deg_jra55_ryf (checksums created using commit 5e2e8e5), against
• dev-1deg_jra55_ryf (checksums in commit fa65d53)

Further information

The experiment can be found on Gadi at /scratch/tm70/repro-ci/experiments/access-om2-configs/5e2e8e50079a1b12252abe278b1844e9bfd2a6b0, and the test results at https://github.com/ACCESS-NRI/access-om2-configs/runs/41774105818.

The checksums generated by this !test command are found in the testing/checksum directory of https://github.com/ACCESS-NRI/access-om2-configs/actions/runs/14876226141/artifacts/3075723469.

The checksums compared against are found here https://github.com/ACCESS-NRI/access-om2-configs/tree/fa65d5360be0f4cf2563cbd082d833f0a17dced1/testing/checksum

[dougiesquire]

!test repro

[github-actions]

❌ The Bitwise Reproducibility Check Failed ❌

When comparing:

• test-mom5-cmake-1deg_jra55_ryf (checksums created using commit 043c9f6), against
• dev-1deg_jra55_ryf (checksums in commit fa65d53)

Further information

The experiment can be found on Gadi at /scratch/tm70/repro-ci/experiments/access-om2-configs/043c9f67f8b6124765db62258132c6083f86455d, and the test results at https://github.com/ACCESS-NRI/access-om2-configs/runs/41775453180.

The checksums generated by this !test command are found in the testing/checksum directory of https://github.com/ACCESS-NRI/access-om2-configs/actions/runs/14876643336/artifacts/3075860213.

The checksums compared against are found here https://github.com/ACCESS-NRI/access-om2-configs/tree/fa65d5360be0f4cf2563cbd082d833f0a17dced1/testing/checksum

[dougiesquire]

@harshula, the two tests above show that moving from using FMS in the MOM5 repo to using external access-fms causes answers to change. Is that expected? The code should be the same right? So what is different?

[harshula]

Hi @dougiesquire , The objective is to ensure ACCESS-NRI/FMS's mom5 branch is identical to the internal FMS version in MOM5, including compiler flags, etc. That should lead to access-fms functioning the same as the MOM5 internal FMS. You should definitely investigate why the answers are different.

[dougiesquire]

These two changes are required for external FMS to reproduce internal FMS:

• Add MOM5 REPRO flags to preserve answers with MOM5 internal FMS FMS#12
• access-fms: set variant gfs_phys default to False access-spack-packages#237