+ int gather_id = find_coll_description(mpi_coll_gather_description,
+ sg_cfg_get_string("smpi/gather"));
+ mpi_coll_gather_fun = (int (*)(void *, int, MPI_Datatype,
+ void*, int, MPI_Datatype, int, MPI_Comm))
+ mpi_coll_gather_description[gather_id].coll;
+