File baselibs.conf of Package SDL_mixer

libSDL_mixer-1_2-0
  provides "SDL_mixer-<targettype> = <version>"
  obsoletes "SDL_mixer-<targettype> <= <version>"
SDL_mixer-devel
  requires -SDL_mixer-<targettype>
  requires "libSDL_mixer-1_2-0-<targettype> = <version>"