cmake OPENAL_HAS_EFX examples

H-uru/Plasma CMakeLists.txt :181 

cmake_dependent_option(USE_EFX "Use EFX for environmental audio effects" ON "OPENAL_HAS_EFX" OFF)

H-uru/Plasma cmake/FindOpenAL.cmake :50 

check_include_file(efx.h OPENAL_HAS_EFX)