wcstok
======

POSIX specification:
 https://pubs.opengroup.org/onlinepubs/9699919799/functions/wcstok.html

Gnulib module: wcstok

Portability problems fixed by Gnulib:

  * This function is missing on some platforms: Cygwin 1.5.x.

  * This function takes only two arguments on some platforms: mingw, older MSVC.

  * This function may use hidden state, ignoring the third argument, and thus exhibit a bug when two or more wcstok iteration loops are being performed in the same thread, on some platforms: HP-UX 11.31.

Portability problems not fixed by Gnulib:

  * On Windows and 32-bit AIX platforms, wchar_t is a 16-bit type and therefore cannot accommodate all Unicode characters.