9.1166 wcstok

POSIX specification:
http://www.opengroup.org/onlinepubs/9699919799/functions/wcstok.html

Gnulib module: wcstok

Portability problems fixed by Gnulib:

• This function is missing on some platforms: IRIX 5.3, Solaris 2.5.1, Cygwin 1.5.x.

Portability problems not fixed by Gnulib:

• On AIX and Windows platforms, wchar_t is a 16-bit type and therefore cannot accommodate all Unicode characters.