[f-cpu] The last killing argument FOR the GPL licence

["Nicolas Boulay" <nicolas.boulay@ifrance.com>]

I just disover one very important point for us inside the GPL FAQ.

http://www.fsf.org/licenses/gpl-faq.html#LinkingOverControlledInterface
---
How can I allow linking of proprietary modules with my GPL-covered
library under a controlled interface only?
Add this text to the license notice of each file in the package, at the
end of the text that says the file is distributed under the GNU GPL: 

    Linking FOO statically or dynamically with other modules is making a
combined work based on FOO.  Thus, the terms and conditions of the GNU
General Public License cover the whole combination.

    As a special exception, the copyright holders of FOO give you
permission to link FOO with independent modules that communicate with
FOO solely through the FOOBAR interface, regardless of the license terms
of these independent modules, and to copy and distribute the resulting
combined work under terms of your choice, provided that  every copy of
the combined work is accompanied by a complete copy of the source code
of FOO (the version of FOO used to produce the combined work), being
distributed under the terms of the GNU General Public License plus this
exception.  An independent module is a module which is not derived from
or based on FOO.

    Note that people who make modified versions of FOO are not obligated
to grant this special exception for their modified versions; it is their
choice whether to do so.  The GNU General Public License gives
permission to release a modified version without this exception; this
exception also makes it possible to release a modified version which
carries forward this exception.

---

So this interface could be the bus interface to the outside only (the
internal bus of the chip, the wishbone ?).

nicO

 
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