>>>>> "Gary" == "Gary D Duzan" <gary@wheel.tiac.net> writes:

Gary>    How about using a union fs? I've found it quite useful in other
Gary> situations where I don't want to edit the original files.

(a) union mounts are still buggy  (particularly when doing multiple
things at once, you can get deadlocks)

(b) union mounts (currently) require that your top layer be FFS or
something that supports whiteout, which means you can't set up a build
tree on NFS or AFS or ...

==John