https://bugzilla.redhat.com/show_bug.cgi?id=1919639
--- Comment #31 from Robert robert.de.rooy@gmail.com --- Here is a comment on the licenses from one of the developers (Wengier):
About licensing - some libraries are released under the zlib/libpng license, Apache license, BSD license, LGPL license, Expat license, etc. Most (if not all) of them appear to be compatible with either GNU GPL v2 or v3. The vs2015 directory may not need to be counted by the way.