+#include "xbt/lib.h"
+
+xbt_lib_t host_lib;
+int ROUTING_HOST_LEVEL; //Routing level
+int SURF_CPU_LEVEL; //Surf cpu level
+int SURF_WKS_LEVEL; //Surf workstation level
+int SIMIX_HOST_LEVEL; //Simix level
+int MSG_HOST_LEVEL; //Msg level
+int SD_HOST_LEVEL; //Simdag level
+int COORD_HOST_LEVEL; //Coordinates level
+
+xbt_lib_t link_lib;
+int SD_LINK_LEVEL; //Simdag level
+int SURF_LINK_LEVEL; //Surf level
+
+xbt_lib_t as_router_lib;
+int ROUTING_ASR_LEVEL; //Routing level
+int COORD_ASR_LEVEL; //Coordinates level