Build dependencies are too specific to mpich and OpenMPI #14
Description
It was observed on a Reddit thread that haskell-mpi has become build dependent on mpich2 or OpenMPI:
http://www.reddit.com/r/haskell/comments/1amua2/using_haskellmpi_as_language_agnostic_ipc/
In the .cabal file we have:
if flag(mpich14)
extra-libraries: mpich, opa, mpl
else
extra-libraries: mpi, open-rte, open-pal
This causes trouble if you try to build with some other version of MPI.
It would be good to have a way to build the library with a minimal dependency on libmpi and mpi.h. Features which are specific to particular MPI implementations should be optional.