From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 28682 invoked by alias); 27 May 2010 11:43:48 -0000 Received: (qmail 28662 invoked by uid 22791); 27 May 2010 11:43:47 -0000 X-SWARE-Spam-Status: No, hits=-1.9 required=5.0 tests=AWL,BAYES_00,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Received: from mail.codesourcery.com (HELO mail.codesourcery.com) (38.113.113.100) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 27 May 2010 11:43:42 +0000 Received: (qmail 11131 invoked from network); 27 May 2010 11:43:40 -0000 Received: from unknown (HELO digraph.polyomino.org.uk) (joseph@127.0.0.2) by mail.codesourcery.com with ESMTPA; 27 May 2010 11:43:40 -0000 Received: from jsm28 (helo=localhost) by digraph.polyomino.org.uk with local-esmtp (Exim 4.69) (envelope-from ) id 1OHbUx-0005pF-1n; Thu, 27 May 2010 11:43:39 +0000 Date: Thu, 27 May 2010 11:46:00 -0000 From: "Joseph S. Myers" To: Basile Starynkevitch cc: Mark Mitchell , GCC Subject: Re: GFDL/GPL issues In-Reply-To: <1274937022.3572.101.camel@glinka> Message-ID: References: <4BFC6EF0.4090908@codesourcery.com> <1274937022.3572.101.camel@glinka> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-owner@gcc.gnu.org X-SW-Source: 2010-05/txt/msg00621.txt.bz2 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