+/*
+ Optionally supported C++ features.
+ */
+
+/*
+ RTTI: if it is disabled in build/msw/makefile.* then this symbol will
+ already be defined but it's also possible to do it from configure (with
+ g++) or by editing project files with MSVC so test for it here too.
+ */
+#ifndef wxNO_RTTI
+ /*
+ Only 4.3 defines __GXX_RTTI by default so its absence is not an
+ indication of disabled RTTI with the previous versions.
+ */
+# if wxCHECK_GCC_VERSION(4, 3)
+# ifndef __GXX_RTTI
+# define wxNO_RTTI
+# endif
+# elif defined(_MSC_VER)
+# ifndef _CPPRTTI
+# define wxNO_RTTI
+# endif
+# endif
+#endif // wxNO_RTTI
+