-XBT_PUBLIC_DATA(double) sg_maxmin_precision;
-XBT_PUBLIC_DATA(double) sg_surf_precision;
-XBT_PUBLIC_DATA(int) sg_concurrency_limit;
+XBT_PUBLIC_DATA double sg_maxmin_precision;
+XBT_PUBLIC_DATA double sg_surf_precision;
+XBT_PUBLIC_DATA int sg_concurrency_limit;