if(PROJECT_ENABLE_OGG)
  if(PROJECT_BUILD)
    find_package(Ogg ${OGG_VERSION} REQUIRED)

    add_definitions(-DPROJECT_ENABLE_OGG)

    include_directories(BEFORE SYSTEM
      ${OGG_INCLUDE_DIRS}
    )

    link_libraries(
      Ogg::ogg
    )
  elseif(NOT PROJECT_IS_MINGW OR CMAKE_HOST_WIN32)
    ExternalProject_Add(ogg_project
      PREFIX external
      URL ${PROJECT_3RD_PARTY_DIR}/ogg-v${OGG_VERSION}.tar.gz
      URL_HASH SHA256=f6f1b04cfa4e98b70ffe775d5e302d9c6b98541f05159af6de2d6617817ed7d6
      LIST_SEPARATOR |
      CMAKE_ARGS ${PROJECT_EXTERNAL_CMAKE_FLAGS}
        -DBUILD_SHARED_LIBS=${PROJECT_BUILD_SHARED_LIBS}
        -DBUILD_STATIC_LIBS=ON
    )

    set(PROJECT_DEPENDENCIES 
      ${PROJECT_DEPENDENCIES}
      ogg_project
    )
  endif()
endif()