lanx@lanx-1005HA:~$ export PERL5OPT="-Mstrict"
lanx@lanx-1005HA:~$ perldoc perldoc
Global symbol "$running_under_some_shell" requires explicit package name at /usr/bin/pod2man line 6.
BEGIN not safe after errors--compilation aborted at /usr/bin/pod2man line 18.
Got a 0-length file from /usr/share/perl/5.14/pod/perldoc.pod via Pod::Perldoc::ToMan!?

##</code><code>##

#!/usr/bin/perl

eval 'exec /usr/bin/perl  -S $0 ${1+"$@"}'
    if 0; # not running under some shell
    eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
        if $running_under_some_shell;

# pod2man -- Convert POD data to formatted *roff input.
#
# Copyright 1999, 2000, 2001, 2004, 2006, 2008, 2010
#     Russ Allbery <rra@stanford.edu>
#
# This program is free software; you may redistribute it and/or modify it
# under the same terms as Perl itself.

require 5.004;

use Getopt::Long qw(GetOptions);
use Pod::Man ();
use Pod::Usage qw(pod2usage);

use strict;
# ...