+void Sys_Quit (int returnvalue);
+
+// on some build/platform combinations (such as Linux gcc with the -pg
+// profiling option) this can turn on/off profiling, used primarily to limit
+// profiling to certain areas of the code, such as ingame performance without
+// regard for loading/shutdown performance (-profilegameonly on commandline)
+void Sys_AllowProfiling (qboolean enable);