-#if !defined(SIMGRID_VERSION) || SIMGRID_VERSION < 30700UL // == SG < 3.7 == //
-# error "Unsupported SimGrid version. Need version >= 3.7"
-#endif // ================================================================== //
-
-#if SIMGRID_VERSION < 30800UL // ============================== SG < 3.8 === //
-# define MSG_init(argc, argv) MSG_global_init(argc, argv)
-# define msg_error_t MSG_error_t
-# define msg_host_t m_host_t
-# define msg_process_t m_process_t
-# define msg_task_t m_task_t
-#else // =================================================================== //
-# define MSG_clean() MSG_OK
-#endif // ================================================================== //
+#if !defined(SIMGRID_VERSION) || SIMGRID_VERSION < 31800UL // == SG < 3.18 == //
+# error "Unsupported SimGrid version. Need version >= 3.18"
+#endif // =================================================================== //