+# Enable run-time type information (RTTI) in compiled code. [0,1]
+!ifndef USE_RTTI
+USE_RTTI = 1
+!endif
+
+# Enable threading in compiled code. [0,1]
+!ifndef USE_THREADS
+USE_THREADS = 1
+!endif
+
+# Is this official build by wxWidgets developers? [0,1]