G'day mmartin,

I needed to do something similar just yesterday. I worked with the log of cpan commands which, on my system (not MSWin), is in ~/.cpan/histfile. Luckily, this hasn't quite scrolled off the top of my screen yet:

$ perl -Mwarnings -Mstrict -Mautodie -E '
    open my $fh, "<", "$ENV{HOME}/.cpan/histfile";
    my @modules;
    my %seen;
    while (<$fh>) {
        next unless /^install (.*)$/;
        next if $1 =~ /^Tk/;
        next if $seen{$1}++;
        push @modules, $1;
    }
    say "force test @modules";
'
[download]

That's it verbatim. You'll need to make a few changes:

• The command line quoting is, I believe, pretty much the opposite on your OS to what I have here.
• Where I'm filtering out modules starting with Tk, you'll want to filter out everything except Gtk, Glib and Pango. I'll assume you have a better idea of what their namespaces are than I do.
• I was generating a "force test ..." command to be pasted directly at the "cpan[n]>" prompt; you'll presumably want "install ...".