Cmake FindMPI test
This is an MPI "hello world" program that test the functionality of the CMake FindMPI.cmake script and prints out all relevent environment and CMake variables involved.
To configure and compile:
$ ./build.sh
To test the executable:
$ cd _build
$ mpirun -np 2 testmpi
If you currently have the environment variables FC, CC, or CXX set to compiler wrappers, FindMPI.cmake should find and use these. If the relevent mpi compiler wrappers are on your path, then the following should also correctly find the wrappers.
$ FC="" CC="" CXX="" ./build.sh
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