__STDC_ISO_10646__ status

[Emanuele Giaquinta]

Hi,

Does anyone know what is the current status wrt __STDC_ISO_10646__
support in modern systems (other than glibc)? A few programs, for
example alpine and rxvt-unicode, assume wchar_t encoding is ucs-4, which
means they will likely work only in UTF-8/ISO-8859-1/POSIX locales on
systems with a locale dependent wchar_t encoding. Do you think this
approach is resonable nowadays? Besides, the alternative to reinvent the
wheel (on top of iconv usually) is not feasible in some situations, like
when using curses wide char api (get_wch), if the app wants to use
ucs-4 internally that is.

Thanks,

Emanuele