has clause is compatible license of has website homepage derivative code same license GNU Project Free License Type GNU GPL v3 GNU GPL v2 EPL v1 https://www.eclipse.org/legal/epl-v10.html The Eclipse Public License is similar to the Common Public License. This is a free software license. Unfortunately, its weak copyleft and choice of law clause make it incompatible with the GNU GPL. The only change is that the EPL removes the broader patent retaliation language regarding patent infringement suits specifically against Contributors to the EPL'd program. Eclipse Public License Version 1.0 https://www.gnu.org/licenses/license-list.html, accessed 28 June 2016.