+// using STL implies using std::string
+#if wxUSE_STL
+ #undef wxUSE_STD_STRING
+ #define wxUSE_STD_STRING 1
+#endif
+
+// we use STL-based string internally if we use std::string at all now, there
+// should be no reason to prefer our internal implement but if you really need
+// it you can predefine wxUSE_STL_BASED_WXSTRING as 0 when building the library
+#ifndef wxUSE_STL_BASED_WXSTRING
+ #define wxUSE_STL_BASED_WXSTRING wxUSE_STD_STRING
+#endif