The following fails to pass 'use warnings.' It generates the warning "/turnoff8.pl:20: main::check_ip() called too early to check prototype." Is there a way to use both recursion and 'use warnings'? 
sub check_ip() {
    eval{
        my $ip_test = new Net::IP(`curl whatismyip.org`);
        return $ip_test->ip();
        };
    if ($@){
        sleep(300);
        check_ip();
    };
}

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In reply to Is recursion consistent with "use warnings" by jonathansamuel

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