http://www.perlmonks.org?node_id=471391


in reply to Re^2: Problems with 'our' definition with perl 5.00503
in thread Problems with 'our' definition with perl 5.00503

You should send in a documentation patch for perlvar then, because I pulled this line from there:
This can be used to determine whether the Perl interpreter exe- cuting a script is in the right range of versions. (Mnemonic: use ^V for Version Control.) Example: warn "No \"our\" declarations!\n" if $^V and $^V lt v5.6.0;