fms: add 2025.03, 2026.01, and 2026.01.01

[rem1776]

Updates the fms package for the past 3 releases. Includes patches to disable the unit tests building by default.

Fixes #3596, NOAA-GFDL/FMS#1865,

[mathomp4]

@rem1776 Your PR here is "above" mine in #3210

But in mine I also have an extra variant to allow for mixed precision:

https://github.com/spack/spack-packages/pull/3210/changes#diff-9e41468068bdebf1d7bc5e2e27e562dedf069b46d8405de850554dface0349cc

I also seem to have:

    # When https://github.com/NOAA-GFDL/FMS/pull/1787 is merged, we can uncomment the following
    # and allow back specified precision variants for 2026.0x and later.
    # variant(
    # "precision",
    # values=any_combination_of("32", "64", "mixed").with_default("mixed"),
    # description="Build a version of the library with mixed precision ('mixed' or 'none'), or 32 and/or 64 bit reals",
    # when="@2026.0x:",
    # )

commented out in there.

Any objections to adding in the mixed precision?

[mathomp4]

I'm guessing 2026.01.01 might have NOAA-GFDL/FMS#1787 ?

[rem1776]

@rem1776 Your PR here is "above" mine in #3210

But in mine I also have an extra variant to allow for mixed precision:

https://github.com/spack/spack-packages/pull/3210/changes#diff-9e41468068bdebf1d7bc5e2e27e562dedf069b46d8405de850554dface0349cc

I also seem to have:

    # When https://github.com/NOAA-GFDL/FMS/pull/1787 is merged, we can uncomment the following
    # and allow back specified precision variants for 2026.0x and later.
    # variant(
    # "precision",
    # values=any_combination_of("32", "64", "mixed").with_default("mixed"),
    # description="Build a version of the library with mixed precision ('mixed' or 'none'), or 32 and/or 64 bit reals",
    # when="@2026.0x:",
    # )

commented out in there.

Any objections to adding in the mixed precision?

No objections here! I can add that in.

I'm guessing 2026.01.01 might have NOAA-GFDL/FMS#1787 ?

Yeah 2026.01.01 includes that change, which should also fix the build issue. I still included the patch just so that spack doesn't have to waste time building our unit tests.

[mathomp4]

@rem1776 I think we need all three:

    variant(
        "precision",
        values=any_combination_of("32", "64", "mixed").with_default("mixed"),
        description="Build a version of the library with mixed precision ('mixed' or 'none'), or 32 and/or 64 bit reals",
        when="@2026.01.01:",
    )

    # NOTE: For FMS 2025.04 to 2026.01, only mixed precision ('none') is supported.
    # Since a single variant is no variant, we do not have a precision variant for these versions.

    variant(
        "precision",
        values=("mixed",),
        description="Build a version of the library with mixed precision (both 32 and 64 bit reals). "
        "NOTE: This is the only supported precision variant for FMS versions 2025.04 to 2026.01",
        default="mixed",
        multi=True,
        when="@2025.04:2026.01",
    )

    variant(
        "precision",
        values=("32", "64"),
        description="Build a version of the library with default 32 or 64 bit reals or both",
        default="32",
        multi=True,
        when="@2022.04:2025.03",
    )

The issue is that 2025.04 and 2026.01 only support mixed precision (which 2026.01.01 fixed)

[rem1776]

@rem1776 I think we need all three:

    variant(
        "precision",
        values=any_combination_of("32", "64", "mixed").with_default("mixed"),
        description="Build a version of the library with mixed precision ('mixed' or 'none'), or 32 and/or 64 bit reals",
        when="@2026.01.01:",
    )

    # NOTE: For FMS 2025.04 to 2026.01, only mixed precision ('none') is supported.
    # Since a single variant is no variant, we do not have a precision variant for these versions.

    variant(
        "precision",
        values=("mixed",),
        description="Build a version of the library with mixed precision (both 32 and 64 bit reals). "
        "NOTE: This is the only supported precision variant for FMS versions 2025.04 to 2026.01",
        default="mixed",
        multi=True,
        when="@2025.04:2026.01",
    )

    variant(
        "precision",
        values=("32", "64"),
        description="Build a version of the library with default 32 or 64 bit reals or both",
        default="32",
        multi=True,
        when="@2022.04:2025.03",
    )

The issue is that 2025.04 and 2026.01 only support mixed precision (which 2026.01.01 fixed)

They only worked with 'mixed' before due to a bug with cmake, but with the patches added by this PR all 3 options should now work for those two versions.