From: Oleh Krehel <ohwoeowho@gmail.com>
To: Andreas Hilboll <lists@hilboll.de>
Cc: emacs-orgmode@gnu.org
Subject: Re: How to make a non-GPL Org-mode exporter?
Date: Tue, 28 Jul 2015 11:30:07 +0200 [thread overview]
Message-ID: <87k2tkzl28.fsf@gmail.com> (raw)
In-Reply-To: <55B74951.8050609@hilboll.de> (Andreas Hilboll's message of "Tue, 28 Jul 2015 11:20:17 +0200")
Andreas Hilboll <lists@hilboll.de> 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
next prev parent reply other threads:[~2015-07-28 9:37 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-27 12:10 How to make a non-GPL Org-mode exporter? Marcin Borkowski
2015-07-27 12:16 ` Oleh Krehel
2015-07-27 13:02 ` Rainer M Krug
2015-07-27 13:09 ` Greg Troxel
2015-07-27 13:13 ` Andreas Hilboll
2015-07-27 13:30 ` Rainer M Krug
2015-07-27 14:05 ` Marcin Borkowski
2015-07-27 14:03 ` Marcin Borkowski
2015-07-28 12:33 ` Paul Rudin
2015-07-27 12:39 ` Daniele Nicolodi
2015-07-27 16:59 ` Marcin Borkowski
2015-07-27 18:02 ` Nick Dokos
2015-07-27 18:12 ` Marcin Borkowski
2015-07-27 18:45 ` Daniele Nicolodi
2015-07-28 7:55 ` Oleh Krehel
2015-07-29 14:54 ` Aaron Ecay
2015-07-30 10:08 ` Oleh Krehel
2015-07-27 13:05 ` Greg Troxel
2015-07-27 14:32 ` Marcin Borkowski
2015-07-27 13:58 ` Scott Randby
2015-07-27 16:32 ` Marcin Borkowski
2015-07-27 15:13 ` Eric S Fraga
2015-07-27 16:01 ` Marcin Borkowski
2015-07-27 16:12 ` Oleh Krehel
2015-07-27 17:12 ` Marcin Borkowski
2015-07-27 17:13 ` Thomas S. Dye
2015-07-27 16:54 ` Eric S Fraga
2015-07-27 17:04 ` Marcin Borkowski
2015-07-27 18:38 ` Eric S Fraga
2015-07-28 8:07 ` Oleh Krehel
2015-07-28 9:00 ` Eric S Fraga
2015-07-28 9:00 ` Oleh Krehel
2015-07-28 10:38 ` Eric S Fraga
2015-07-28 9:20 ` Andreas Hilboll
2015-07-28 9:30 ` Oleh Krehel [this message]
2015-07-28 10:14 ` Andreas Hilboll
2015-07-28 10:29 ` Oleh Krehel
2015-07-27 18:32 ` Richard Lawrence
2015-08-04 15:04 ` Phillip Lord
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