Function mpi::ffi::PMPI_Intercomm_create

pub unsafe extern fn PMPI_Intercomm_create(local_comm: MPI_Comm,
                                           local_leader: c_int,
                                           bridge_comm: MPI_Comm,
                                           remote_leader: c_int,
                                           tag: c_int,
                                           newintercomm: *mut MPI_Comm)
                                           -> c_int