FYI: I've added a -b(ackup) flag to install(1) to move any existing
file(s) aside by renaming them to file.old instead of simply deleting
them. A different backup suffix may be chosen with the -B option's
argument.

This allows preserving existing files when installing new
things: make install INSTALL="install -b"


 - Hubert

-- 
Hubert Feyrer <hubert.feyrer@rz.uni-regensburg.de>