libFLAC14
  obsoletes "flac-<targettype> <= <version>"
  obsoletes "libflac-<targettype> <= <version>"
libFLAC++11
flac-devel
  requires -flac-<targettype>
  requires "libFLAC14-<targettype> = <version>"
  requires "libFLAC++11-<targettype> = <version>"