pub unsafe extern "C" fn MPI_Dist_graph_create_adjacent( comm_old: MPI_Comm, indegree: c_int, sources: *const c_int, sourceweights: *const c_int, outdegree: c_int, destinations: *const c_int, destweights: *const c_int, info: MPI_Info, reorder: c_int, comm_dist_graph: *mut MPI_Comm) -> c_int