-extern double smpi_wtime_sleep;
-extern double smpi_iprobe_sleep;
-extern double smpi_test_sleep;
+extern XBT_PRIVATE double smpi_wtime_sleep;
+extern XBT_PRIVATE double smpi_iprobe_sleep;
+extern XBT_PRIVATE double smpi_test_sleep;
+
+SG_END_DECL()