cmake SDL_mixer examples

openclonk/openclonk cmake/FindAudio.cmake :90 

find_package(SDL2Mixer)

dbeef/spelunky-psp cmake/DependenciesWindows.cmake :3 

find_package(SDL_mixer REQUIRED)

gemrb/gemrb cmake/Helpers.cmake :261 

FIND_PACKAGE(SDL_mixer MODULE)

gecube/opencaesar3 CMakeLists.txt :30 

find_package(SDL_mixer REQUIRED)