rationale          36 ompi/include/mpif-sentinels.h !     MPI_IN_PLACE has the same rationale as MPI_BOTTOM.
rationale          44 ompi/include/mpif-sentinels.h !     MPI_ERRCODES_IGNORE has similar rationale to MPI_ARGV_NULL.  The
rationale          51 ompi/include/mpif-sentinels.h !     MPI_STATUS_IGNORE has similar rationale to MPI_ERRCODES_IGNORE.