This is a Swift Package Manager package for MPICH.
The package exports a single module, CMPI.
Due to bugs in the current version of the Swift Package Manager, it is currently unable to use the pkg-config file provided with MPICH. Instead, use -Xlinker -L/usr/local/lib (or other path to the MPICH library) to compile.
A simple MPI program (à la 'Hello World') appears to work correctly, but this has not been extensively tested. Feedback is requested!
MPICH derivatives (such as MVAPICH and Intel-MPI) might work with this package as well, but this has not been tested.