-#if !defined(SIMGRID_VERSION) // ========== SimGrid <= 3.5 ============= //
-# error "Unsupported SimGrid version. Need version > 3.5"
-#endif // ============================================================= //
-
-#if SIMGRID_VERSION < MAKE_SIMGRID_VERSION(3, 8, 0) // ==== SG < 3.8 === //
-# define MSG_init(argc, argv) MSG_global_init(argc, argv)
-#endif // ============================================================== //
+#if !defined(SIMGRID_VERSION) || SIMGRID_VERSION < 31800UL // == SG < 3.18 == //
+# error "Unsupported SimGrid version. Need version >= 3.18"
+#endif // =================================================================== //