5 POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/listen.html}
9 Portability problems fixed by Gnulib:
12 On Windows platforms (excluding Cygwin), error codes from this function
13 are not placed in @code{errno}, and @code{WSAGetLastError} must be used
17 Portability problems not fixed by Gnulib: