sub whats_installed
{
    require File::Find;

    for my $ix(0..$#INC)
    {
        print $INC[$ix], "\n";
        File::Find::find(sub { print $File::Find::name, "\n"},$INC[$ix]);
    }
}

sub whats_installed2
{
    require File::Find;

    for my $ix(0..$#INC)
    {
        print $INC[$ix],"\n";
        File::Find::find( sub {substr ($_, -3) eq '.pm' && print $File::Find::name, "\n";}, $INC[$ix]);
    }

}