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Re: [O] How to make a non-GPL Org-mode exporter?
From: |
Oleh Krehel |
Subject: |
Re: [O] How to make a non-GPL Org-mode exporter? |
Date: |
Tue, 28 Jul 2015 11:30:07 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
Andreas Hilboll <address@hidden> writes:
>>> Look here:
>>> https://en.wikipedia.org/w/index.php?title=GNU_General_Public_License§ion=11#Libraries
>>>
>>> Most useful quote:
>>>
>>>> The Free Software Foundation (which holds the copyright of several
>>>> notable GPL-licensed software products and of the license text itself)
>>>> asserts that an executable which uses a dynamically linked library is
>>>> indeed a derivative work. This does not however apply to separate
>>>> programs communicating with one another.
>> thanks for this link and excerpt. I could argue that the key word in
>> the excerpt is "executable". I cannot see how code written in elisp
>> itself would need to be GPL.
>
> Exactly. To quote again
> https://www.gnu.org/licenses/gpl-faq.html#IfInterpreterIsGPL:
>
> When the interpreter just interprets a language, the answer is no.
> The interpreted program, to the interpreter, is just data; a free
> software license like the GPL, based on copyright law, cannot limit
> what data you use the interpreter on. You can run it on any data
> (interpreted program), any way you like, and there are no
> requirements about licensing that data to anyone.
Just to link the paragraph exactly below the one you quoted
> However, when the interpreter is extended to provide “bindings” to
> other facilities (often, but not necessarily, libraries), the
> interpreted program is effectively linked to the facilities it uses
> through these bindings. So if these facilities are released under the
> GPL, the interpreted program that uses them must be released in a
> GPL-compatible way. The JNI or Java Native Interface is an example of
> such a binding mechanism; libraries that are accessed in this way are
> linked dynamically with the Java programs that call them. These
> libraries are also linked with the interpreter. If the interpreter is
> linked statically with these libraries, or if it is designed to link
> dynamically with these specific libraries, then it too needs to be
> released in a GPL-compatible way.
Indeed, the Emacs interpreter gives "bindings" to all Emacs facilities,
which are GPL, and the interpreted program that uses them must be
released in a GPL-compatible way.
Plus Emacs supports byte compilation: someone could publish only the
exporter.elc, without providing exporter.el. That would be illegal, but
if the third party is given exporter.el released under BSD by a second
party, theoretically they could do it. Therefore, the second party
should not be allowed to change to BSD if they're linking to GPL code.
--Oleh
- Re: [O] How to make a non-GPL Org-mode exporter?, (continued)
- Re: [O] How to make a non-GPL Org-mode exporter?, Marcin Borkowski, 2015/07/27
- Re: [O] How to make a non-GPL Org-mode exporter?, Thomas S . Dye, 2015/07/27
- Re: [O] How to make a non-GPL Org-mode exporter?, Eric S Fraga, 2015/07/27
- Re: [O] How to make a non-GPL Org-mode exporter?, Marcin Borkowski, 2015/07/27
- Re: [O] How to make a non-GPL Org-mode exporter?, Eric S Fraga, 2015/07/27
- Re: [O] How to make a non-GPL Org-mode exporter?, Oleh Krehel, 2015/07/28
- Re: [O] How to make a non-GPL Org-mode exporter?, Eric S Fraga, 2015/07/28
- Re: [O] How to make a non-GPL Org-mode exporter?, Oleh Krehel, 2015/07/28
- Re: [O] How to make a non-GPL Org-mode exporter?, Eric S Fraga, 2015/07/28
- Re: [O] How to make a non-GPL Org-mode exporter?, Andreas Hilboll, 2015/07/28
- Re: [O] How to make a non-GPL Org-mode exporter?,
Oleh Krehel <=
- Re: [O] How to make a non-GPL Org-mode exporter?, Andreas Hilboll, 2015/07/28
- Re: [O] How to make a non-GPL Org-mode exporter?, Oleh Krehel, 2015/07/28
Re: [O] How to make a non-GPL Org-mode exporter?, Richard Lawrence, 2015/07/27