Function mpi::ffi::OMPI_C_MPI_DUP_FN

pub unsafe extern fn OMPI_C_MPI_DUP_FN(comm: MPI_Comm,
                                       comm_keyval: c_int,
                                       extra_state: *mut c_void,
                                       attribute_val_in: *mut c_void,
                                       attribute_val_out: *mut c_void,
                                       flag: *mut c_int)
                                       -> c_int