message: fix execution on ubuntu
diff: if (APPLE)
  set(_symbols_list "${CMAKE_CURRENT_SOURCE_DIR}/symbols.list")
  set(LINK_FLAGS "${LINK_FLAGS} -Wl,-exported_symbols_list,'${_symbols_list}'")
  -elseif (CMAKE_CXX_COMPILER_ID STREQUAL GNU)
  +else()
  set(_version_script "${CMAKE_CURRENT_SOURCE_DIR}/version.script")
  set(LINK_FLAGS "${LINK_FLAGS} -Wl,--version-script,\"${_version_script}\"")
  endif (APPLE)
  