cmake HAVE_OPENAL examples

hlrs-vis/covise src/OpenCOVER/vrml97/vrml/CMakeLists.txt :37 

ADD_DEFINITIONS(-DHAVE_OPENAL)

wang-bin/QtAV src/CMakeLists.txt :130 

check_library_exists(OpenAL alGetError "" HAVE_OPENAL)

wang-bin/QtAV src/CMakeLists.txt :132 

check_library_exists(openal alGetError "" HAVE_OPENAL)

wang-bin/QtAV src/CMakeLists.txt :134 

check_library_exists(OpenAL alGetError "" HAVE_OPENAL)

mandarine3ds/mandarine src/audio_core/CMakeLists.txt :61 

target_compile_definitions(audio_core PUBLIC HAVE_OPENAL)