SUPPORT_OPENGL by default. (The general guideline for arch_setup

is "provide reasonable behavior by default"; arch_setup should set up
things special for that architecture, with a minimum of boilerplate.)

stepmania/src/StepMania.cpp

@@ -31,10 +31,13 @@
 #include "Game.h"
 #include "RageSurface.h"
 #include "RageSurface_Load.h"
-#include "arch/arch.h"
 #include "CatalogXml.h"
 #include "ExportStrings.h"
 
+#if !defined(SUPPORT_OPENGL) && !defined(SUPPORT_D3D)
+#define SUPPORT_OPENGL
+#endif
+
 //
 // StepMania global classes
 //