#!/usr/local/perl5.6.1/bin/perl -w
use strict;
use warnings;
use Module::CoreList;

our %modules;

my @files = @ARGV;
unless (@files) {
    print "$0: using test scripts\n";
    @files = grep { -e $_ } 'test.pl', glob 't/*.t';
}

print "$0: checking ", join(', ', @files), "\n";

my @used;
for (@files) {
    open my $fh, "$^X -Mblib -MModule::CoreList=dumpinc $_|"
      or die "couldn't fork $!";
    while (<$fh>) { last if /^---INC---/ }
    push @used, map { chomp; s{/}{::}g; s{\.pm$}{}; $_ } <$fh>;
}

*modules = \%Module::CoreList::version;
my %uniq = map { $_ => 0 } grep { !exists $modules{$]}{$_} } @used;

use Data::Dumper;
print Dumper \%uniq;