+/* ---------------------------------------------------------------------------- */
+/* string manipulation helpers */
+/* ---------------------------------------------------------------------------- */
+
+/* helper macros to concatenate two tokens together */
+#define wxCONCAT_HELPER(text, line) text ## line
+#define wxCONCAT(text, line) wxCONCAT_HELPER(text, line)
+
+/* helper macros to convert a token into string literal */
+#define wxSTRINGIZE_HELPER(x) #x
+#define wxSTRINGIZE(x) wxSTRINGIZE_HELPER(x)
+
+