I think this should be s not g.

stepmania/src/arch/ArchHooks/ArchHooks.cpp

@@ -1,7 +1,7 @@
 #include "global.h"
 #include "ArchHooks.h"
 
-bool ArchHooks::g_bQuitting = false;
+bool ArchHooks::s_bQuitting = false;
 ArchHooks *HOOKS = NULL;
 
 #include "Selector_ArchHooks.h"

stepmania/src/arch/ArchHooks/ArchHooks.h

@@ -3,7 +3,7 @@
 
 class ArchHooks
 {
-	static bool g_bQuitting;
+	static bool s_bQuitting;
 public:
 	virtual ~ArchHooks() { }
 
@@ -48,8 +48,8 @@ public:
 	/*
 	 * Returns true if the user wants to quit (eg. ^C, or clicked a "close window" button).
 	 */
-	static bool UserQuit() { return g_bQuitting; }
-	static void SetUserQuit() { g_bQuitting = true; }
+	static bool UserQuit() { return s_bQuitting; }
+	static void SetUserQuit() { s_bQuitting = true; }
 
 	/*
 	 * Return the amount of time since the program started.  (This may actually be