Re: [cc65] Closing down

From: Ullrich von Bassewitz <>
Date: 2013-03-17 23:51:17
On Sun, Mar 17, 2013 at 11:33:24PM +0100, Oliver Schmidt wrote:
> Would it be appropriate / legal to change the copyright messages at
> all? What would be the "correct" approach? What are the options
> regarding the license?

A copyright notice is not required, so from a legal standpoint removing the
notice won't change anything. The original author has the copyright and you
cannot change the license without having his agreement. What you can do is to
add code with another license (the original license must allow distribution of
changed sources if you want to do this). A popular case is adding GPLed code.
Because of the viral nature of the GPL, this means that the combined work will
then have the restrictions of the GPL. Which means that in most cases it is no
longer possible to add another license.

Since the license which covers most of the cc65 code is pretty permissive, I
cannot see a real problem with it. There are still two files which do probably
(I haven't checked for ages) contain fragments of the old cc65 code, which
means that the compiler itself is *not* covered by the zlib license as a
whole. All other tools are completely covered by the zlib license which allows
you to do almost anything with it.

I'm not sure about the reason for your question, but I hope my answer helpful



Ullrich von Bassewitz                        
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Received on Sun Mar 17 23:51:33 2013

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