>:seems like they are changed on installworld (mtime changed);
>:anyway they aren't removed on upgrade ('make upgrade'),
>:so all hosts which has been source upgraded for a few years will have file.
>
> I think that's in line with what we want. If things move around we
> delete the old binaries and libraries but if libraries get out of date
> and are no longer built we generally let the originals stand when the
> system is upgraded so any installed third-party programs which depend
> on them still run.
Exactly, my note was just that it is a common & versatile situation to have a
working setup on DragonFly systems for executing old FreeBSD binaries,
comitted seemed to indicate that it is rare.
-thomas