Re: [Qemu-devel] [patch] s390-dis.c license

["M. Warner Losh" <imp@bsdimp.com>]

In message: <alpine.LSU.1.00.0801172250060.5731@racer.site>
            Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:
: Hi,
: 
: On Thu, 17 Jan 2008, M. Warner Losh wrote:
: 
: > In message: <20080117223145.GI28842@networkno.de>
: >             Thiemo Seufer <ths@networkno.de> writes:
: > : andrzej zaborowski wrote:
: > : > On 17/01/2008, Bill C. Riemers <docbill@gmail.com> wrote:
: > : > > According to section 9 of the GPL, you would only have to contact
: > : > > contributors for code which specified version 2 of the GPL and not later...
: > : > 
: > : > In order to relicense all of qemu, yes, plus contributors of
: > : > BSD-licensed code, of which there is much more than GPLv2-licensed.
: > : 
: > : Actually, re-licensing BSD code as GPL is legal (but not nice).
: > 
: > No.  It isn't.  *ADDING* the GPL license to a 2-clause BSD licensed file 
: > is legal, but removing the BSD stuff is not allowed.  It must be 
: > retained, per the BSD license.
: 
: Since we are in pea-counter mode:  if you add something _more_ than just a 
: license, you _can_ relicense with the GPL.  That means that everybody 
: using _your_ modified version as a base _must_ license the result using 
: GPL, or not license it at all.

Almost right.  They must license with the GPL, but the original BSD
license must also remain intact within the file.  Since the GPL is a
supoerset of the 2-cluase BSD license, you are actually licensing
under both...

Warner