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Your vendor has not defined POSIX macro F_GETFL, used at C:/Perl/site/ +lib/POE/Wheel/SocketFactory.pm line 377
# Don't block on socket operations, because the socket will be # driven by a select loop. my $flags = fcntl($socket_handle, F_GETFL, 0) ... $poe_kernel->yield($state_failure, 'fcntl', $!+0, $!); return undef; };