if(PROJECT_ENABLE_FLAC)
  if(PROJECT_BUILD)
    find_package(FLAC ${FLAC_VERSION} REQUIRED)

    add_definitions(-DPROJECT_ENABLE_FLAC)

    include_directories(BEFORE SYSTEM
      ${FLAC_INCLUDE_DIRS}
    )

    link_libraries(
      FLAC::FLAC
    )
  elseif(NOT PROJECT_IS_MINGW OR CMAKE_HOST_WIN32)
    ExternalProject_Add(flac_project
      PREFIX external
      URL ${PROJECT_3RD_PARTY_DIR}/flac-${FLAC_VERSION}.tar.gz
      URL_HASH SHA256=0a4bb82a30609b606650d538a804a7b40205366ce8fc98871b0ecf3fbb0611ee
      LIST_SEPARATOR |
      CMAKE_ARGS ${PROJECT_EXTERNAL_CMAKE_FLAGS}
        -DBUILD_SHARED_LIBS=${PROJECT_BUILD_SHARED_LIBS}
        -DBUILD_STATIC_LIBS=ON
        -DBUILD_EXAMPLES=ON
        -DBUILD_PROGRAMS=ON
        -DBUILD_TESTING=OFF
        -DBUILD_DOCS=OFF
        -DINSTALL_MANPAGES=OFF
    )

    set(PROJECT_DEPENDENCIES 
      ${PROJECT_DEPENDENCIES}
      flac_project
    )

    add_dependencies(flac_project vorbis_project)
  endif()
endif()