Look at the actual files for copyright (or copyleft, if you will): http://git.savannah.gnu.org/cgit/lightning.git/tree/lib/lightning.c http://git.savannah.gnu.o

Look at the actual files for copyright (or copyleft, if you will): http://git.savannah.gnu.org/cgit/lightning.git/tree/lib/lightning.c http://git.savannah.gnu.org/cgit/lightning.git/tree/lib/ligh... Looks like the libraryis lgpl,I couldn't find licensefor the docs themselves (I assume they use document license (COPYING.DOC)). There seemsto be at least one example program that is gpl: http://git.savannah.gnu.org/cgit/lightning.git/tree/doc/body.texi#n1671 http://git.savannah.gnu.org/cgit/lightning.git/tree/doc/body...