tl;dr: GNU LibreDWG is licensed GPL3+, incompatible with projects that use other open source licenses, including "GPLv2 only". I'm a little surprised that a li

tl;dr: GNU LibreDWG is licensed GPL3+, incompatible with projects that use other open source licenses, including "GPLv2 only". I'm a little surprised that a library such as LibreDWG is not licensed LGPL, but come to think of it, this isn't unexpected from the hardline FSF (Stallman). They want to create a coherent free ecosystem, and are unwilling license their work with licenses that have known loopholes. That's a damn shame for these almost-but-not-quite-as-libre software projects such as LibreCAD, FreeCAD, Open Asset Import Library and Bender. What's wrong with the OpenDWG [1] libraries, licensed GPLv2? [1]: http://sourceforge.net/projects/opendwg/ http://sourceforge.net/projects/opendwg/