wxMGL-2.8.3.zip build fails:wx/univ/chkconf.h: No such file or directory

[0.707]

>  Hmm, I wonder why configure doesn't find wchar_t then. Could you please
> check the value of wxUSE_WCHAR_T in lib/wx/include/*/wx/setup.h and, if it
> is 0, also the value of ac_cv_sizeof_wchar_t in config.log?

In file /include/wx/univ/setup.h ,I found:

// Setting wxUSE_WCHAR_T to 1 gives you some degree of Unicode support
without
// compiling the program in Unicode mode. More precisely, it will be
possible
// to construct wxString from a wide (Unicode) string and convert any
wxString
// to Unicode.
//
// Default is 1
//
// Recommended setting: 1 for win32 else 0
#if defined(__WIN32__) || defined(__WATCOMC__)
    #define wxUSE_WCHAR_T 1
#else
    #define wxUSE_WCHAR_T 0
#endif

and in my config.log,I found this line:
ac_cv_sizeof_wchar_t=0

Should I change the value in file setup.h?