[Dev-C++] Wide chars

[w.y. <yok...@ve...>]

For a windows prog I know about

#define _UNICODE
#define UNICODE

but what do you do to activate the wide char functions in a
non-windows program?

In <iostream> I see this:

  extern istream cin;
  extern ostream cout;
  extern ostream cerr;
  extern ostream clog;
#ifdef _GLIBCPP_USE_WCHAR_T
  extern wistream wcin;
  extern wostream wcout;
  extern wostream wcerr;
  extern wostream wclog;
#endif

But do I have to define _GLIBCPP_USE_WCHAR_T myself or is there
a header to include which does that?