Richard Stallman - the originator of GCC and Emacs and copyleft - says 10 years: https://www.gnu.org/philosophy/misinterpreting-copyright.en.html https://www.gn

Richard Stallman - the originator of GCC and Emacs and copyleft - says 10 years: https://www.gnu.org/philosophy/misinterpreting-copyright.en.html https://www.gnu.org/philosophy/misinterpreting-copyright.en....