HP-UX 11i September 2001 Release Notes

New and Changed Internationalization Features
Multibyte Support Extension and Unix98 Support (new at 11i original release)
Chapter 15
240
fputwc(), putwc(), putwchar()
The type of first argument is changed from wint_t to wchar_t.
freopen()
Regardless of the mode of underlying stream, after a successful call to the freopen()
function, the orienting of the stream is cleared and the associated mbstate_t object is
set to describe an initial conversion state.
wcschr(), wcsrchr()
The type of second argument is changed from wint_t to wchar_t.