Re: [mkgmap-dev] License issue in mkgmap & splitter source: GPL-2 (v2 only) incompatible with GPL-3 (v3 only)

On 08/06/2017 08:41 AM, Gerd Petermann wrote:

okay, I see no problem to change to GPL-2+ for sources written by me, but if that also means we need permissions from authors who did not post anything since many years you can probably forget this. A quick check in mkgmap sources shows 297 java sources with GPL-3 or GPL-2+ licence and 273 with GPL-2 only. Most of the latter (236) are from Steve Ratcliffe or have no copyright section.

Yes, hunting down past contributors is a problem with relicensing. Alternatively GPL-3 (v3 only) sources must be kept out of mkgmap & splitter, because that introduces the license incompatibility with the many GPL-2 (v2 only) sources. Kind Regards, Bas