I was reading through the LGPL license and found a requirement that I was previously unaware of.Section 4 (Combined Works) states:You may convey a Combined Work [...] if you also do each of the  following: a) Give prominent notice with each copy of the Combined  Work that the Library is used in it and that the Library and its use  are covered by this License. b) Accompany the Combined Work with a  copy of the GNU GPL and this license document. c) ...Why must the GPL also be conveyed when linking to libraries licensed under the LGPL?  I fear that including both licenses in the distribution would confuse the user as to which one applies.  Am I interpreting this correctly?  If so, what is the reasoning behind this requirement?
Why does the LGPL require combined works to include a copy of the GPL?
licensing;open source;gpl;lgpl
The LGPL is not a license of its own, but an extension of the GPL. It states:This version of the GNU Lesser General Public License incorporates the terms and conditions of version 3 of the GNU General Public License, supplemented by the additional permissions listed below.The LGPL license document only contains the extensions, so to provide the complete license you will also need to copy the vanilla GPL. It is reasonable to require a user of a LGPL library to provide the full license of the library they are using.