if (-M $init_file > $days) {
            $message = "Warning: $init_file is older than $days day\n"


##</code><code>##


for my $init_file ( '.', '..' ) {
    my $mod = ( stat $init_file )[9];
    if ( my @mod = grep { ( stat $_ )[9] > $mod } @INC ) {
        warn "Warning: $init_file is older than (", join( ' , ', @mod ), ") ";
    }
}

__END__
Warning: .. is older than (C:/perl/5.10.1/lib/MSWin32-x86-multi-thread , C:/perl/5.10.1/lib , C:/perl/site/5.10.1/lib/MSWin32-x86-multi-thread , C:/perl/site/5.10.1/lib , .)  at - line 4.