Author: Dann Corbit
Date: 17:07:46 12/05/00
Go up one level in this thread
On December 05, 2000 at 14:03:24, Gian-Carlo Pascutto wrote: >On December 05, 2000 at 13:20:05, Dan Andersson wrote: > >>I would say that its a problem for Amy and ExChess et al, not to Nalimov but >its easy to work around The authors ask Eugene for permission to use the code >>and point out what parts if any that are not GPL. > >For Eugene, there is indeed no problem at all. For Amy and ExChess I >think things are not so easy. > >The GPL says: > >These requirements apply to the modified work as a whole. If >identifiable sections of that work are not derived from the Program, >and can be reasonably considered independent and separate works in >themselves, then this License, and its terms, do not apply to those >sections when you distribute them as separate works. > >-> So far so good. > >But when you distribute the same sections as part of a whole which is a work >based on the Program, the distribution of the whole must be on the terms of >this License, whose permissions for other licensees extend to the >entire whole, and thus to each and every part regardless of who wrote it. > >I think this basically means that if Amy and ExChess want to continue >using the Nalimov code they will have to get Eugene to grant a special >permission...that effectively puts that code under GPL, or stop >distributing their programs under GPL. Using GPL code and non-free code >together is a very complex issue. See the whole KDE/Qt drama. I am not >suprised running into this with the EGTB code, since it was a piece of >code with shaky copyrights that is used in GPL software. This is [of course] the "GPL Virus" theory. Of course, your *own* GPL software can have more relaxed constraints like those in LGPL. Personally, I greatly prefer public licensing like the Berkeley license style or the ACE license style. I have also made contributions to Snippets, which is public domain. >I thought about making my own (GPL) tablebase generator, that would be >usable for chess variants like suicide also. However, making such a thing >efficient and generating all databases is another matter. Nalimov format >is very good. > >>Easy Copyrigth link: >> >>http://www.templetons.com/brad/copymyths.html > >It's a nice link but it doesn't help much trying to understand difficult >issues like using non-GPL code in a GPL program. Yet another problem with that format (IMO). But I don't much like it.
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