I would like a little clarification of the license terms for scsh. To quote the
Copyright (C) 1993, 1994 by Richard Kelsey and Jonathan Rees.
Copyright (C) 1994, 1995 by Olin Shivers and Brian D. Carlstrom.
Use of this program for non-commercial purposes is permitted provided that such
use is acknowledged both in the software itself and in accompanying
Use of this program for commercial purposes is also permitted, but only if, in
addition to the acknowledgment required for non-commercial users, written
notification of such use is provided by the commercial user to the authors
prior to the fabrication and distribution of the resulting software.
This software is provided "as is" without express or implied warranty.
My question is, do the terms "commercial use" and "non-commercial use" refer to
execution of a scsh binary (and heap image etc) that one builds from the
ditribution, in a "commercial" or "non-commercial" environment respectively, or
do they refer to use of scsh source code in another software product?
The former interpretation would be a license which could be said to be
"stronger" than the GPL (more restrictive), the latter interpretation would be
a weaker license than the GPL.
The reason that I ask (apart from wanting to know if I am violating the licence
by using scsh at work) is that I am thinking of porting some scsh features to
another scheme. I want to know what limitations there would be on my
distribution of this code; if it was any tougher than the GPL, then I'd go for
a re-implementation based on the doco rather than actually porting the code.
Looking forward to the definitive word on this.