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auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=berrange@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/13 02:06:42 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Cc: Joelle van Dyne , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Oct 13, 2020 at 04:41:06PM +0200, BALATON Zoltan wrote: > On Tue, 13 Oct 2020, Daniel P. Berrangé wrote: > > On Mon, Oct 12, 2020 at 04:29:33PM -0700, Joelle van Dyne wrote: > > > From: osy > > > > > > On iOS, we cannot fork() new processes, so the best way to load QEMU into an > > > app is through a shared library. We add a new configure option > > > `--enable-shared-lib` that will build the bulk of QEMU into a shared lib. > > > The usual executables will then link to the library. > > > > Note that QEMU as a combined work is licensed GPLv2-only, so if an app is > > linking to it as a shared library, the application's license has to be > > GPLv2 compatible. I fear that shipping as a shared library is an easy way > > for apps to get into a license violating situation without realizing. > > Please don't let that be an obstacle in merging this series. They'll do it > anyway as seen here so having it upstream is probably better than having a > lot of different/divergent forks. "They'll violate the license anyway" is not a compelling argument. > In case of UTM it seems to be licensed under Apache License 2.0: > > https://github.com/utmapp/UTM/blob/master/LICENSE > > which FSF says not compatible with GPLv2 but it is with GPLv3: > > http://www.gnu.org/licenses/license-list.html#apache2 > > Not sure however if that's for using Apache licenced part in GPLv2 code or > the other way around like in UTM in which case I think the whole work will > effectively become GPLv3 as most parts of QEMU is probably GPLv2+ already or > BSD like free that should be possible to combine with only files explicitely > GPLv2 in QEMU remaining at that license and UTM parts are Apache 2.0 when > separated from QEMU. I have no idea about legal stuff whatsoever but > combining two free software components should be legal some way (otherwise > it's not possible to combine GPLv2 with GPLv3 either). You need to distinguish between GPLv2-only and GPLv2-or-later. GPLv2-or-later is fine as that upgrades to GPLv3 when used in a combined work with Apache License or GPLv3 software. GPLv2-only will, by design, *not* upgrade to newer GPL versions when combined - it is simply license incompatible. QEMU unfortunately has a bunch a GPLv2-only code present that we cannot eliminate. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|