- After consulting with George, only define the fortran types if the
back end Fortran compiler actually supports them. We always have
the corresponding global C datatypes, but it seems nicer user
behavior to have them fail at compile time rather than at run time
if they try to use MPI_INTEGER8 and it doesn't exist (in which case
ompi_mpi_integer8 will be a synonym for ompi_mpi_datatype_null)
This commit was SVN r5520.