SKIP: {
skip 'TCP_DEFER_ACCEPT is Linux-only', 1 if $^O ne 'linux';
- my $var = Socket::TCP_DEFER_ACCEPT();
+ my $var = eval { Socket::TCP_DEFER_ACCEPT() } // 9;
defined(my $x = getsockopt($sock, IPPROTO_TCP, $var)) or die;
ok(unpack('i', $x) > 0, 'TCP_DEFER_ACCEPT set');
};