Function mpi::ffi::MPI_Graph_create

pub unsafe extern fn MPI_Graph_create(comm_old: MPI_Comm,
                                      nnodes: c_int,
                                      index: *const c_int,
                                      edges: *const c_int,
                                      reorder: c_int,
                                      comm_graph: *mut MPI_Comm)
                                      -> c_int