+XBT_PUBLIC_DATA(int (*mpi_coll_barrier_fun)(MPI_Comm comm));
+
+XBT_PUBLIC(void) coll_help(const char *category, s_mpi_coll_description_t * table);
+XBT_PUBLIC(int) find_coll_description(s_mpi_coll_description_t * table, char *name, const char *desc);
+
+extern XBT_PRIVATE double smpi_wtime_sleep;
+extern XBT_PRIVATE double smpi_iprobe_sleep;
+extern XBT_PRIVATE double smpi_test_sleep;