Richard Wrote : If https://github.com/flybywiresim/a32nx is your project then you're nearly there because you're already opensource - but the next step is that all of the contributors need to licence their work under the GPL V2 (or later) and then you can use anything from this A320 - or anything else from FlightGear.
If you do not licence your work under the GPL V2 or later then you cannot use anything from this A320.
As long as they keep the licence for the copied work GPL V2 then they can use it....
GPL make it quite clear it's not a virus !
When will these people stop talking bollocks !