[oe] libcdaudio license issue

[Frans Meulenbroeks]

I was checking libcdaudio for LICENSE info.
recipe says GPL
COPYING file is the GPLv2 one
README file says:

libcdaudio is distributed under the GNU Library General Public
License, included in this package under the top level source directory
in the file COPYING

C files also mention LGPL. but say v2 or later

What to do with this in the LICENSE field? LGPLv2+ ?

Frans