in reply to How to require IPv6 support
You'll see fails for Win32 with Perl certainly less than 5.14. I know for a fact the Strawberry < 5.14 versions of Socket do not support IPv6 as I've tried with them on Windows 7 which certainly does support IPv6 and will compile IPv6 C code.
The work around I've used is:
UPDATE: See UPDATE section in Re^2: ipv6 support on windows.
use if $] < 5.014, "Socket" => qw(inet_ntoa unpack_sockaddr_in IPPROT
+O_TCP AF_INET AF_UNSPEC);
use if $] < 5.014, "Socket6";
use if $] < 5.014, "Socket::GetAddrInfo" => qw(getaddrinfo getnameinf
use if $] >= 5.014, "Socket" => qw(:addrinfo inet_ntoa inet_ntop unpac
+k_sockaddr_in unpack_sockaddr_in6 IPPROTO_TCP AF_INET AF_UNSPEC);