getwc
=====

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

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: Minix 3.1.8, Cygwin 1.5.x.

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