use strict;
use warnings;


#-- example
use Getopt::Long;

#-- example / somewhere in your code or imported modules
require Math::BigInt;

#-- ... more ...

#-- at the end, we should have seen them all
END {

  print "VERSION / MODULE / PATH:\n";

  for my $module (sort keys %INC) {

    my $mod_name = $module;
    $mod_name =~ s{/}{::};
    $mod_name =~ s/\.pm$//i;

    #-- perhaps, the module author followed the convention?
    my $ver = eval "\$${mod_name}::VERSION" || '?';

    printf "%-8s %-35s %s\n",
      $ver,
      $mod_name,
      $INC{$module};
  }

}