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Re: GFDL/GPL issues
- From: "Joseph S. Myers" <joseph at codesourcery dot com>
- To: Basile Starynkevitch <basile at starynkevitch dot net>
- Cc: Mark Mitchell <mark at codesourcery dot com>, GCC <gcc at gcc dot gnu dot org>
- Date: Thu, 27 May 2010 11:43:39 +0000 (UTC)
- Subject: Re: GFDL/GPL issues
- References: <4BFC6EF0.4090908@codesourcery.com> <1274937022.3572.101.camel@glinka>
On Thu, 27 May 2010, Basile Starynkevitch wrote:
> However, could you (or some other well informed person) elaborate on
> that incompatibility. What exactly is incompatible? Is it some paragraph
> of GPLv3 versus another paragraph of GFDL1.2 - which ones? Or why is it
> incompatible?
Any two non-identical copyleft licenses are generally incompatible with
each other, since a copyleft license permits distribution only under the
terms of exactly that license and not under some other license with
similar terms. (The LGPL achieves compatibility with the GPL by allowing
you to remove the additional permissions the LGPL grants and distribute
the result under the GPL alone. Similarly, the FSF could grant
permissions on documentation and code it owns to allow them to be
distributed under both the GPL and the GFDL, and that is what we want
them to do.)
--
Joseph S. Myers
joseph@codesourcery.com