LoadingWindow_Gtk almost sort of halfway works, in a manner of speaking.

stepmania/src/StepMania.cpp

@@ -52,7 +52,6 @@
 /* This is also a global class; we own it. */
 ArchHooks *HOOKS = NULL;
 
-
 #ifdef WIN32
 
 #ifdef DEBUG
@@ -65,6 +64,10 @@ HWND g_hWndMain = NULL;
 
 #endif
 
+#ifdef HAVE_GTK
+#  include <gtk/gtk.h>
+#endif
+
 static bool g_bHasFocus = true;
 static bool g_bQuitting = false;
 
@@ -433,6 +436,10 @@ int main(int argc, char* argv[])
 	 * Do it after ChangeToDirOfExecutable, so the log ends up in the right place. */
 	LOG			= new RageLog();
 
+#ifdef HAVE_GTK
+	gtk_init(&argc,&argv);
+#endif
+
 #ifdef DEBUG
 	LOG->ShowConsole();
 #endif