Switch WW3 to hybrid MPI+OpenMP build

[ezhilsabareesh8]

Switch WW3 to OPENMP

---

🚀 The latest prerelease access-om3/pr265-5 at 443cc8f is here: #265 (comment) 🚀

[github-actions]

🚀 Attempted to deploy access-om3 Prerelease pr265-1 with commit d3b2bf4

🖥️ Gadi Deployment ✔️

Usage Instructions

access-om3, defined in spack.yaml, will be deployed to Gadi as:

• 2026.05.003 as a Release (when merged).
• pr265-1 as a Prerelease (during this PR).

This Prerelease is accessible on Gadi using:

module use /g/data/vk83/prerelease/modules
module load access-om3/pr265-1

When using the above modules, the binaries shall be on your $PATH.

For advanced users, this Prerelease is also accessible on Gadi via /g/data/vk83/prerelease/apps/spack/1.1/spack in the access-om3-pr265-1 environment.
Due to inode-saving measures, one will have to manually untar the environment metadata before environment activation with tar -xf .spack-env .spack-env.tar. It will require one to have write privileges.

Configuration Information

This Prerelease is deployed using:

• access-nri/spack on branch 1.1
• ACCESS-NRI/upstream-spack-packages version access/v1.1
• access-nri/access-spack-packages version 2026.08.005
• access-nri/spack-config version 2026.08.001

If the above was not what was expected, commit changes to the manifest in this PR, or propose changes to build-cds config/settings.json.

[ezhilsabareesh8]

!redeploy

[github-actions]

🚀 Attempted to deploy access-om3 Prerelease pr265-3 with commit 1468496

🖥️ Gadi Deployment ❌

[github-actions]

🚀 Attempted to deploy access-om3 Prerelease pr265-2 with commit 1468496

🖥️ Gadi Deployment ❌

[ezhilsabareesh8]

!redeploy

[github-actions]

🚀 Attempted to deploy access-om3 Prerelease pr265-4 with commit 1468496

🖥️ Gadi Deployment ❌

[github-actions]

🚀 Attempted to deploy access-om3 Prerelease pr265-5 with commit 443cc8f

🖥️ Gadi Deployment ✔️

Usage Instructions

access-om3, defined in spack.yaml, will be deployed to Gadi as:

• 2026.05.003 as a Release (when merged).
• pr265-5 as a Prerelease (during this PR).

This Prerelease is accessible on Gadi using:

module use /g/data/vk83/prerelease/modules
module load access-om3/pr265-5

When using the above modules, the binaries shall be on your $PATH.

For advanced users, this Prerelease is also accessible on Gadi via /g/data/vk83/prerelease/apps/spack/1.1/spack in the access-om3-pr265-5 environment.
Due to inode-saving measures, one will have to manually untar the environment metadata before environment activation with tar -xf .spack-env .spack-env.tar. It will require one to have write privileges.

Configuration Information

This Prerelease is deployed using:

• access-nri/spack on branch 1.1
• ACCESS-NRI/upstream-spack-packages version access/v1.1
• access-nri/access-spack-packages version 2026.08.005
• access-nri/spack-config version 2026.08.001

If the above was not what was expected, commit changes to the manifest in this PR, or propose changes to build-cds config/settings.json.