Testing GCC by dougiesquire · Pull Request #136 · ACCESS-NRI/ACCESS-OM2

dougiesquire · 2026-02-18T22:38:51Z

There's been some discussion on Zulip about using consistent fdefault fp GNU compiler flags for all model components.

The original question from @harshula was:

For GCC compilers, should we standardise on -fdefault-real-8 -fdefault-double-8 or -fdefault-real-8 for the ACCESS-OM2 components? I should update oasis3-mct and potentially libaccessom2.

cice5: https://github.com/ACCESS-NRI/cice5/blob/cf5df9d4d26265dc5c79e558e5a67834b51fd38d/CMakeLists.txt#L96

mom5: https://github.com/ACCESS-NRI/MOM5/blob/627a321f7490afc69b4a8e777992bcfb1f58b5ae/cmake/CMakeLists.txt#L62

This PR is for testing these options.

🚀 The latest prerelease access-om2/pr136-11 at d15826b is here: #136 (comment) 🚀

@dougiesquire

Apply suggestion from @dougiesquire Co-authored-by: Dougie Squire <dougiesquire@gmail.com>

github-actions · 2026-02-18T22:58:58Z

🚀 Attempted to deploy access-om2 Prerelease pr136-1 with commit 9b68a3b

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dougiesquire · 2026-02-18T23:06:55Z

@harshula this appears to be trying to use the Intel version of openmpi.

f951: Fatal Error: Reading module '/apps/openmpi/5.0.8/include/Intel/mpi.mod' at line 1 column 2: Unexpected EOF

Any idea why?

Release 2026.02.000 v2

spack.yaml

harshula · 2026-02-18T23:13:44Z

Hi @dougiesquire , Try @5.0.8%gcc@13.2.0 and then change the three compiler c.require to c.prefer because you chose gcc 15.1.0 and not gcc 13.2.0.

dougiesquire · 2026-02-18T23:18:24Z

Ta. Maybe I should just be using gcc@13.2.0 for everything

github-actions · 2026-02-19T00:02:23Z

🚀 Attempted to deploy access-om2 Prerelease pr136-2 with commit d3960a4

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harshula · 2026-02-19T00:06:06Z

==> [2026-02-19-11:00:47.605925] Installing oasis3-mct-git.2025.03.001=2025.03.001-ez2lttx6tyvxw6wis3tgyuvhgw5ggym2 [18/23]

11 errors found in build log:
     3869     
     3870       293 |         proc,' error, stat =',trim(adjustl(cer))
     3871           |         1
     3872     Warning: Nonconforming tab character at (1) [-Wtabs]
     3873     m_die.F90:329:44:

Hi @dougiesquire , Yes, let's try gcc 13.2.0 and see if ACCESS-OM2 compiles and then come back and fix syntax and compile with 15.1.0.

dougiesquire · 2026-02-19T00:32:47Z

Just noting that what you copied here is just a warning. The error was:

     25504    /scratch/tm70/***/tmp/spack-stage/spack-stage-oasis3-mct-git.
              2025.03.001_2025.03.001-y5fkrp6dfj7ra37zfhqwhvwvc5dyorue/spack-sr
              c/lib/psmile/src/mod_oasis_coupler.F90:1624:15:
     25505    
     25506     1624 |       status = nf90_get_var(fid, vid, areasrc0%rAttr)
     25507          |               1
  >> 25508    Error: There is no specific function for the generic 'nf90_get_va
              r' at (1)
     25509    /scratch/tm70/***/tmp/spack-stage/spack-stage-oasis3-mct-git.
              2025.03.001_2025.03.001-y5fkrp6dfj7ra37zfhqwhvwvc5dyorue/spack-sr
              c/lib/psmile/src/mod_oasis_coupler.F90:1655:15:
     25510    
     25511     1655 |       status = nf90_get_var(fid, vid, areadst0%rAttr)
     25512          |               1
  >> 25513    Error: There is no specific function for the generic 'nf90_get_va
              r' at (1)

ADDED: This was with

-fdefault-real-8 added to oasis3-mct
openmpi@5.0.8%gcc@13.2.0 and preferring gcc@15.1.0 for everything else

github-actions · 2026-02-19T00:44:33Z

🚀 Attempted to deploy access-om2 Prerelease pr136-3 with commit c926c01

🖥️ `Gadi` Deployment ❌

dougiesquire · 2026-02-19T00:51:45Z

Same error:

     25504    /scratch/tm70/***/tmp/spack-stage/spack-stage-oasis3-mct-git.
              2025.03.001_2025.03.001-y5fkrp6dfj7ra37zfhqwhvwvc5dyorue/spack-sr
              c/lib/psmile/src/mod_oasis_coupler.F90:1624:15:
     25505    
     25506     1624 |       status = nf90_get_var(fid, vid, areasrc0%rAttr)
     25507          |               1
  >> 25508    Error: There is no specific function for the generic 'nf90_get_va
              r' at (1)
     25509    /scratch/tm70/***/tmp/spack-stage/spack-stage-oasis3-mct-git.
              2025.03.001_2025.03.001-y5fkrp6dfj7ra37zfhqwhvwvc5dyorue/spack-sr
              c/lib/psmile/src/mod_oasis_coupler.F90:1655:15:
     25510    
     25511     1655 |       status = nf90_get_var(fid, vid, areadst0%rAttr)
     25512          |               1
  >> 25513    Error: There is no specific function for the generic 'nf90_get_va
              r' at (1)

ADDED: This was with

-fdefault-real-8 added to oasis3-mct
%gcc@13.2.0 for everything

harshula · 2026-02-19T01:45:44Z

Hi @dougiesquire , Have you changed anything in access-spack-packages? If so, what did you change?

dougiesquire · 2026-02-19T02:00:58Z

Yep - I changed these:

spack_repo/access/nri/packages/oasis3_mct/package.py

- F90         = mpif90 -Wall -fallow-argument-mismatch -ffree-line-length-0
+ F90         = mpif90 -Wall -fallow-argument-mismatch -ffree-line-length-0 -fdefault-real-8

spack_repo/access/nri/packages/cice5/package.py

- FFLAGS = -Wall -fdefault-real-8 -fdefault-double-8 -ffpe-trap=invalid,zero,overflow -fallow-argument-mismatch
+ FFLAGS = -Wall -fdefault-real-8 -ffpe-trap=invalid,zero,overflow -fallow-argument-mismatch

I've also just now added -fdefault-double-8 to oasis3-mct, which will also fail, but I'll trigger the build anyway for documentation purposes.

Added `-fdefault-double-8` to oasis3-mct

harshula · 2026-02-19T02:05:57Z

Hi @dougiesquire , If the build fails again, can you please test a build with GCC 13.2.0 and then GCC 15.1.0 but without any changes to SPRs?

dougiesquire · 2026-02-19T02:11:10Z

Sure. I'm pretty confident the former at least will work - we do that as part of the oasis3-mct build-ci (admittedly with Spack 0.22)

github-actions · 2026-02-19T02:19:53Z

🚀 Attempted to deploy access-om2 Prerelease pr136-4 with commit b492c60

🖥️ `Gadi` Deployment ❌

github-actions · 2026-02-19T03:54:48Z

🚀 Attempted to deploy access-om2 Prerelease pr136-6 with commit 0e2db1b

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github-actions · 2026-02-19T04:27:29Z

🚀 Attempted to deploy access-om2 Prerelease pr136-7 with commit b8bb379

🖥️ `Gadi` Deployment ✔️

Usage Instructions

access-om2, defined in spack.yaml, will be deployed to Gadi as:

2026.02.000 as a Release (when merged).
pr136-7 as a Prerelease (during this PR).

This Prerelease is accessible on Gadi using:

module use /g/data/vk83/prerelease/modules
module load access-om2/pr136-7

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-om2-pr136-7 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
spack/spack-packages version 383e969358c951abe17623696083e6f862c4488e
access-nri/access-spack-packages version 2026.02.003
access-nri/spack-config version 2026.02.003

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

dougiesquire · 2026-02-19T04:28:16Z

!update-configs

github-actions · 2026-02-19T04:29:12Z

🔧 Opening/Updating Model Configuration PRs in ACCESS-NRI/access-om2-configs

❌ One or more errors occurred with the workflow

Configurations Requested

Configurations requested from profile default:

dev-1deg_jra55_ryf

Pull Requests Opened/Updated

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More details can be found in the workflow run: https://github.com/ACCESS-NRI/ACCESS-OM2/actions/runs/22168531601

dougiesquire · 2026-02-19T04:55:57Z

pr136-5 uses GCC 13.2.0 with unmodified SPRs. It builds successfully, but appears to have the same issues as David Hutchinson when run (documented starting here).

I'll now try with GCC 15.1.0 as requested by @harshula.

Similarly, pr136-7, which uses GCC 15.1.0 with unmodified SPRs, builds successfully but doesn't run.

Includes the following commit cherry-picked from upstream: NOAA-GFDL/FMS@1b3151c

github-actions · 2026-02-19T05:36:43Z

🚀 Attempted to deploy access-om2 Prerelease pr136-8 with commit 026ac80

🖥️ `Gadi` Deployment ✔️

Usage Instructions

access-om2, defined in spack.yaml, will be deployed to Gadi as:

2026.02.000 as a Release (when merged).
pr136-8 as a Prerelease (during this PR).

This Prerelease is accessible on Gadi using:

module use /g/data/vk83/prerelease/modules
module load access-om2/pr136-8

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-om2-pr136-8 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
spack/spack-packages version 383e969358c951abe17623696083e6f862c4488e
access-nri/access-spack-packages version 2026.02.003
access-nri/spack-config version 2026.02.003

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

dougiesquire · 2026-02-19T05:53:36Z

!update-configs

github-actions · 2026-02-19T05:54:31Z

🔧 Opening/Updating Model Configuration PRs in ACCESS-NRI/access-om2-configs

Configurations Requested

Configurations requested from profile default:

dev-1deg_jra55_ryf

Pull Requests Opened/Updated

The following PRs were opened/updated:

Auto update dev-1deg_jra55_ryf to use access-om2/pr136-5 access-om2-configs#258

More details can be found in the workflow run: https://github.com/ACCESS-NRI/ACCESS-OM2/actions/runs/22170352645

harshula · 2026-02-22T11:51:23Z

spack.yaml

    openmpi:
      require:
-      - '@5.0.8'
+      - '@5.0.8%gcc@13.2.0'


It should still build without this change.

@harshula it doesn't seem to, unless I did something wrong?

https://github.com/ACCESS-NRI/ACCESS-OM2/actions/runs/22296080053

119 f951: Fatal Error: Reading module '/apps/openmpi/5.0.8/include/Inte l/mpi.mod' at line 1 column 2: Unexpected EOF

Thanks for testing it. Can you please try @5.0.8%gcc

Can you please try @5.0.8%gcc

That worked

Remove BOZ literals completely

github-actions · 2026-02-23T07:06:41Z

🚀 Attempted to deploy access-om2 Prerelease pr136-9 with commit 938077a

🖥️ `Gadi` Deployment ❌

github-actions · 2026-02-23T07:45:14Z

🚀 Attempted to deploy access-om2 Prerelease pr136-10 with commit 135400a

🖥️ `Gadi` Deployment ✔️

Usage Instructions

access-om2, defined in spack.yaml, will be deployed to Gadi as:

2026.02.000 as a Release (when merged).
pr136-10 as a Prerelease (during this PR).

This Prerelease is accessible on Gadi using:

module use /g/data/vk83/prerelease/modules
module load access-om2/pr136-10

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-om2-pr136-10 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
spack/spack-packages version 383e969358c951abe17623696083e6f862c4488e
access-nri/access-spack-packages version 2026.02.003
access-nri/spack-config version 2026.02.003

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

Changes to mom5 and libaccessom2 to fix behaviour with allocated pointers Back to access-fms mom5-2025.05.000 Also openmpi@5.0.8%gcc

github-actions · 2026-02-24T22:58:41Z

🚀 Attempted to deploy access-om2 Prerelease pr136-11 with commit d15826b

🖥️ `Gadi` Deployment ✔️

Usage Instructions

access-om2, defined in spack.yaml, will be deployed to Gadi as:

2026.02.000 as a Release (when merged).
pr136-11 as a Prerelease (during this PR).

This Prerelease is accessible on Gadi using:

module use /g/data/vk83/prerelease/modules
module load access-om2/pr136-11

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-om2-pr136-11 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
spack/spack-packages version 383e969358c951abe17623696083e6f862c4488e
access-nri/access-spack-packages version 2026.02.003
access-nri/spack-config version 2026.02.003

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

dougiesquire · 2026-02-24T23:33:04Z

!update-configs

github-actions · 2026-02-24T23:33:57Z

🔧 Opening/Updating Model Configuration PRs in ACCESS-NRI/access-om2-configs

Configurations Requested

Configurations requested from profile default:

dev-1deg_jra55_ryf

Pull Requests Opened/Updated

The following PRs were opened/updated:

Auto update dev-1deg_jra55_ryf to use access-om2/pr136-5 access-om2-configs#258

More details can be found in the workflow run: https://github.com/ACCESS-NRI/ACCESS-OM2/actions/runs/22374778673

dougiesquire · 2026-02-25T03:31:08Z

pr136-11 uses GCC and runs successfully

dougiesquire had a problem deploying to Gadi Prerelease February 18, 2026 22:41 — with GitHub Actions Failure

anton-seaice and others added 3 commits February 19, 2026 09:54

Update to CICE5 @2026.01.000 using CMake

c9d2b39

Apply suggestion from @dougiesquire Co-authored-by: Dougie Squire <dougiesquire@gmail.com>

Update access-generic-tracers to 2026.01.000

19f616d

Update release version to 2026.02.000

cefcacd

Merge pull request #135 from ACCESS-NRI/rc-2026.02.000-v2

1f9b94f

Release 2026.02.000 v2

harshula reviewed Feb 18, 2026

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harshula closed this Feb 18, 2026

harshula reopened this Feb 18, 2026

dougiesquire added 2 commits February 19, 2026 10:30

Use -fdefault-real-8 for all main deps

f661cf5

Use openmpi@5.0.8%gcc@13.2.0

d3960a4

dougiesquire force-pushed the gcc-default-fp-kinds branch from a376a0f to d3960a4 Compare February 18, 2026 23:30

dougiesquire had a problem deploying to Gadi Prerelease February 18, 2026 23:32 — with GitHub Actions Failure

Use gcc@13.2.0

c926c01

dougiesquire had a problem deploying to Gadi Prerelease February 19, 2026 00:24 — with GitHub Actions Failure

Update access-spack-packages version

b492c60

Added `-fdefault-double-8` to oasis3-mct

dougiesquire had a problem deploying to Gadi Prerelease February 19, 2026 02:04 — with GitHub Actions Failure

Use gcc@15.1.0

0e2db1b

dougiesquire had a problem deploying to Gadi Prerelease February 19, 2026 03:49 — with GitHub Actions Failure

Duh

b8bb379

dougiesquire temporarily deployed to Gadi Prerelease February 19, 2026 04:00 — with GitHub Actions Inactive

Update FMS

026ac80

Includes the following commit cherry-picked from upstream: NOAA-GFDL/FMS@1b3151c

dougiesquire temporarily deployed to Gadi Prerelease February 19, 2026 05:00 — with GitHub Actions Inactive

harshula reviewed Feb 22, 2026

View reviewed changes

Update FMS

938077a

Remove BOZ literals completely

dougiesquire had a problem deploying to Gadi Prerelease February 23, 2026 07:02 — with GitHub Actions Failure

openmpi@5.0.8%gcc@13.2.0

135400a

dougiesquire temporarily deployed to Gadi Prerelease February 23, 2026 07:21 — with GitHub Actions Inactive

dougiesquire changed the title ~~Testing default fp kinds for GCC build~~ Testing GCC Feb 24, 2026

Update mom5 and libaccessom2

d15826b

Changes to mom5 and libaccessom2 to fix behaviour with allocated pointers Back to access-fms mom5-2025.05.000 Also openmpi@5.0.8%gcc

dougiesquire temporarily deployed to Gadi Prerelease February 24, 2026 22:25 — with GitHub Actions Inactive

This was referenced Feb 26, 2026

Initialize Ocean_state pointer to null() in access drivers. ACCESS-NRI/MOM5#76

Merged

Check that self%perturbation is allocated before trying to apply perturbations ACCESS-NRI/libaccessom2#29

Merged

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