Pcb-rnd started as a fork of gEDA/PCB thus inherited it's GPL2+ license. See file trunk/COPYING for more details on the license terms. Pcb-rnd -incorporates a few mini-libs with various, GPL-compatible licenses. +incorporates a few mini-libs with various, GPL-compatible licenses, mostly +BSD, MIT and public domain. +
+For users: the resulting software is distributable under the GNU GPL version 2 +(or later versions), the usual GPL terms and conditions apply. +
+Contribution: by contributing, you agree to submit patches that are conforming +to the license terms (e.g. don't copy random code from other projects). We +are keeping track of copyright: each contributor holds the copyright for and +is responsible for their part. Contributors agree to license their contribution +under the same term as the subproject they are adding to, which is typically +GPL2+ for core and plugins and utilities. +
+Re-licensing under different conditions: pcb-rnd's GPL2+ allows the user +to upgrade to GPL3 or later versions of the GPL (as long as new versions +don't contradict with the license of the mini-libs). It is not possible to +change pcb-rnd's license to anything else unless all past developers agree +(but there's not even a index of all the names!). It is possible to request +relicensing of the files that are brand new in pcb-rnd (they are all marked +in the copyright banner on the top of the file) - this requires the agreement +of all copyright holders listed in the file, and wouldn't affect other files. +Same rules apply for mini-libs.