5 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/wctype.html}
9 Portability problems fixed by Gnulib:
12 This function is missing on some platforms:
13 IRIX 5.3, Solaris 2.5.1.
15 This function is declared in @code{<wchar.h>}, not in @code{<wctype.h>}, on
20 Portability problems not fixed by Gnulib:
23 On AIX and Windows platforms, @code{wchar_t} is a 16-bit type and therefore cannot
24 accommodate all Unicode characters.