GitHub Actions Windows MSYS2 MS-MPI

July 9, 2025

While we generally recommend using WSL for MPI on Windows, MS-MPI is available and works with MSYS2 / MinGW GCC Gfortran on Windows. MSYS2 is a popular choice to use GCC, Clang and many other developer tools from the Windows Command Prompt, PowerShell or the MSYS Terminal itself.

Continuous Integration for Windows MPI applications on GitHub Actions is accomplished as in fortran-mpi-examples Windows CI workflows. Set inter-step environment variables using GitHub Actions environment files.