add fortran compiler

[utsekaj42]

Checklist

• [ X] Used a fork of the feedstock to propose changes
• [ ] Bumped the build number (if the version is unchanged)
• [X] Reset the build number to 0 (if the version changed)
• [ ] Re-rendered with the latest conda-smithy (Use the phrase code>@<space/conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• [ ] Ensured the license file is being packaged.

Wasn't sure how to request a new branch (3.1.1).

I assume adding the fortran compiler wouldn't hurt the other branches, but I'm intending this to improve distribution of a package that depends on sundials 3.1.1 with fortran support.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[jschueller]

• do you explicitly need 3.1 ? else there's a 3.2 branch
• seems fortran support needs to be enabled via a cmake option (see build.sh/bld.bat)

[utsekaj42]

Hmm, I need to do some more testing locally. I thought the build I had worked, but on further inspection it seems not have.

I am not entirely sure if there are breaking changes from 3.1.1 to 3.2 but the package, scikits.odes, only supports 3.1.1 .

Outside of the feed-stock, building with

cmake \
-DLAPACK_ENABLE=ON \
 -DSUNDIALS_INDEX_TYPE=int32_t \
-DCMAKE_INSTALL_PREFIX=$CONDA_PREFIX ../sundials-3.1.1/  
make install

is sufficient to then install scikits.odes, but installing the package resulting from 'build-locally.py' doesn't seem to work the same.

[bjodah]

@utsekaj42 have you tried with 3.2.1? Looks like nix uses it: https://github.com/flokli/nixpkgs/commit/7e9e22f4d57816a74a7050a8edc0e85d63427fea

EDIT: besides, looks like sundials-4 support could be near? xref. https://github.com/bmcage/odes/pull/106

[jschueller]

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