+/* HACKHACK: msg_global must be set to a sensible value (like NULL) to use the logging mecanisme
+ * since log_default_appender use xbt_procname which, in SG, is defined in src/msg/m_process.c
+ * (in RL, xbt_procname is defined in src/gras/Virtu/rl_process.c)
+ */
+extern void *msg_global;
+