@itemize
@item
This function is missing on some platforms:
-HP-UX 11, OSF/1 5.1, Solaris 9, Cygwin.
+HP-UX 11, OSF/1 5.1, Solaris 9, Cygwin, Interix 3.5.
@item
On Windows platforms, @code{wchar_t} is a 16-bit type and therefore cannot
accommodate all Unicode characters.