From: Clem Cole
what I don't remember was it in v5
Your memory is going! :-) We discussed this recently (well, recently in _our_
timescale :-); it's built into in 'cc' in V5:
https://minnie.tuhs.org/cgi-bin/utree.pl?file=V5/usr/source/s1/cc.c
see "expand(file)".
Noel