ompi_mpi_unavailable   69 ompi/datatype/ompi_datatype_module.c ompi_predefined_datatype_t ompi_mpi_unavailable =    OMPI_DATATYPE_INIT_PREDEFINED (UNAVAILABLE, 0);
ompi_mpi_unavailable  378 ompi/datatype/ompi_datatype_module.c     [OMPI_DATATYPE_MPI_UNAVAILABLE] = &ompi_mpi_unavailable.dt,