Function mpi::ffi::PMPI_Dist_graph_create

pub unsafe extern fn PMPI_Dist_graph_create(comm_old: MPI_Comm,
                                            n: c_int,
                                            nodes: *const c_int,
                                            degrees: *const c_int,
                                            targets: *const c_int,
                                            weights: *const c_int,
                                            info: MPI_Info,
                                            reorder: c_int,
                                            newcomm: *mut MPI_Comm)
                                            -> c_int