This package fails to build in mock if the minimal build group is reduced to only the packages listed in the Exceptions section of the packaging guidelines. build.log is attached. This problem can be fixed by adding a buildreq of libtool. One other thing I noticed: the devel package includes a .pc file; it should therefore have a dependency on pkgconfig.
Created attachment 133335 [details] Build log with minimal environment
Bug is fixed for quite a while.