For wxWidgets into so-called Unicode (actually UTF-32) mode

modules/gui/wxwidgets/wxwidgets.h

@@ -36,6 +36,7 @@
 
 #include <list>
 
+#define wxUSE_UNICODE 1
 #include <wx/wxprec.h>
 #include <wx/wx.h>
 
@@ -63,17 +64,9 @@ DECLARE_LOCAL_EVENT_TYPE( wxEVT_INTF, 1 );
 
 /* wxU is used to convert ansi/utf8 strings to unicode strings (wchar_t) */
 #if defined( ENABLE_NLS )
-#if wxUSE_UNICODE
 #   define wxU(utf8) wxString(utf8, wxConvUTF8)
-#else
-#   define wxU(utf8) wxString(wxConvUTF8.cMB2WC(utf8), *wxConvCurrent)
-#endif
 #else // ENABLE_NLS
-#if wxUSE_UNICODE
 #   define wxU(ansi) wxString(ansi, wxConvLocal)
-#else
-#   define wxU(ansi) (ansi)
-#endif
 #endif
 
 /* wxL2U (locale to unicode) is used to convert ansi strings to unicode