cmake No CMAKE_Fortran_COMPILER could be found.

[afonari]

(Sorry for spamming with issues)

CMakeLists.txt header:

cmake_minimum_required(VERSION 2.6)
project(packmol Fortran)

Step example:

 - name: Compile using cmake
      if: matrix.compiler == 'cmake'
      run: |
        cmake ./ && cmake --build ./
      shell: bash

Error:

-- The Fortran compiler identification is unknown
CMake Error at CMakeLists.txt:2 (project):
  No CMAKE_Fortran_COMPILER could be found.

See repo: https://github.com/afonari/packmol/

[awvwgk]

I don't see how this issue relates to the action in this repo. Please checkout the packmol documentation on the instructions for building with CMake.

[afonari]

project(XXX Fortran) is a standard cmake directive

https://cmake.org/cmake/help/latest/command/project.html

Also people looking for solutions here for example: https://groups.google.com/g/comp.lang.fortran/c/Jna-QAHCOpk
and here: fortran-lang/stdlib#328

[awvwgk]

I didn't found in the issue that you have a problem using this action on Windows. That you are using this action on a Windows runner for creating a CMake build would be the information I needed to help.

CMake compiler detection is another thing than being able to declare a Fortran project in CMake. The detection is platform specific and apparently different on Windows than on Unix platforms. Using -DCMAKE_Fortran_COMPILER=$FC seems like an easy to implement workaround in your pipeline to normalize the behavior for the different platforms.

[afonari]

Using -DCMAKE_Fortran_COMPILER=$FC seems like an easy to implement workaround in your pipeline to normalize the behavior for the different platforms.

Yeah, this didn't work (also noted in the links I've posted). The solution is to install some Visual Studio intel component, I guess I will just drop windows from testing.

[wpbonelli]

@afonari might be worth trying a different CMake generator on Windows, e.g. MinGW Makefiles

see here

[afonari]

@w-bonelli thanks for the pointer. Can you provide an example of compiling on windows using Cmake in the test file?
Somewhere around here maybe: https://github.com/modflowpy/install-intelfortran-action/blob/main/.github/workflows/ci.yml#L67

[wpbonelli]

@afonari see this comment, and passing Windows build here

Note, the build is not from a project I have any real familiarity with, and I'm pretty new to CMake — take with a grain of salt