MPI_Neighbor_allgather 44 ompi/mpi/c/neighbor_allgather.c #define MPI_Neighbor_allgather PMPI_Neighbor_allgather MPI_Neighbor_allgather 50 ompi/mpi/c/neighbor_allgather.c int MPI_Neighbor_allgather(const void *sendbuf, int sendcount, MPI_Datatype sendtype,