ompi_comm_idup    492 ompi/communicator/communicator.h OMPI_DECLSPEC int ompi_comm_idup (ompi_communicator_t *comm, ompi_communicator_t **newcomm, ompi_request_t **request);
ompi_comm_idup     66 ompi/mpi/c/comm_idup.c     rc = ompi_comm_idup (comm, newcomm, request);