we've recently removed it, having never let it pass beyond
"experimental" status. So this paragraph is now wrong, although it's
not clear what we do recommend in place of -u.
p4raw-id: //depot/perl@31755
operator instead. Note: availability of B<undump> is platform
specific and may not be available for a specific port of Perl.
-This switch has been superseded in favor of the new Perl code
-generator backends to the compiler. See L<B> and L<B::Bytecode>
-for details.
-
=item B<-U>
X<-U>