>> however the binary license may differ -- f.e. when a BSD source is >> linked to a GPL library. Also there is usually more than one license >> used in the sources. > > Right, so the source package should have a ‘debian/copyright’ which > specifies copyright information for all binary packages generated from > that source. ftp depends on libreadline6, which is under the GPL. However, ftp's debian/copyright file only lists BSD licenses.