FPM + Lapack on GitHub Actions

[jacobwilliams]

Does anybody have an example of using FPM with a project that requires LAPACK and have it working in GitHub Actions.

I've got:

[[test]]
link = ["lapack"]
...

and that works fine locally. I guess I probably need to install Lapack... tried this in my CI config:

 sudo apt-get install -y libblas-dev liblapack-dev

But didn't seem to work. Probably I'm missing something simple here. Does anyone have this working?

[awvwgk]

I'm using it quite extensively in quite a few of my projects like dftd4 or tblite. At least the Linux runners usually have a working BLAS/LAPACK installation around, for MacOS I usually install OpenBLAS from homebrew.

In the package manifest you need

link = ["lapack", "blas"]

[jacobwilliams]

Interesting...I do have that...but it isn't picking it up for some reason. Looking at your examples, I'm not sure how mine is different. (also using ubuntu-latest).

[awvwgk]

Looks like you are using LAPACK routines in the library source rather than just the test:

https://github.com/jacobwilliams/nlesolver-fortran/blob/50831bf7448822fa4a027c41184d8802c48c1508/src/nlesolver_module.f90#L624-L652

In this case the link dependency should go into the build table, rather than the test table.

[LKedward]

I ran into this issue when I tested this repository locally on Windows with openblas. I thought is was a quirk of Windows/openblas but I managed to fix it by moving the link entry to the [build] part of fpm.toml instead of under the individual [[test]].
I think this is because the link flags get ordered differently with respect to the library depending on whether its in [build] or in [[test]]/[[executable]].

name = "nlesolver-fortran"
author = "Jacob Williams"
copyright  = "Copyright (c) 2021, Jacob Williams"
license = "BSD-3"
description = "Nonlinear Equation Solver with Modern Fortran"
homepage = "https://github.com/jacobwilliams/nlesolver-fortran"
keywords = ["nle solver"]

[build]
auto-executables = false
auto-examples = false
auto-tests = false
link = "openblas"

[library]
source-dir = "src"

[install]
library = true

[[test]]
name = "nlesolver_test_1"
source-dir = "tests"
main = "nlesolver_test_1.f90"

[jacobwilliams]

Hey, that made it work for me (see here)! Thanks!