+#else /* WITH_SDL_MIXER */
+InitializeSound()
+{
+}
+
+ShutDownSound()
+{
+}
+
+MakeSound(char *channel, char *id)
+{
+}
+
+MakeSoundOn(SimView *view, char *channel, char *id)
+{
+}
+
+StartBulldozer(void)
+{
+}
+
+StopBulldozer(void)
+{
+}
+#endif
+