Boost_LIBRARYDIR拼写不正确

我正试图添加boost到我的CMakeLists.txt文件。然而，我得到这个错误:

CMake Error at /export/home/yhe/local/share/cmake-3.3/Modules/FindBoost.cmake:393 (message):
  ERROR: Boost_LIBRARYDIR is not the correct spelling.  The proper spelling
  is BOOST_LIBRARYDIR.

我正在使用cmake3.3.2和命令:

find_package(Boost 1.55.0 COMPONENTS atomic REQUIRED)

这是文件:

  1 cmake_minimum_required(VERSION 2.8.9)                                                                                                                                                                         
  2 SET(CMAKE_INCLUDE_DIR ${CMAKE_LINCLUDE_DIR} "/export/home/thirdparty/boost/1.55.0/")                                                                                                                          
  3 SET(CMAKE_LIBRARYDIR ${CMAKE_LIBRARYDIR} "/export/home/thirdparty/boost/1.55.0/lib/AS5")                                                                                                                      
  4 message(${Boost_LIBRARYDIR})                                                                                                                                                                                  
  5 find_package(Boost COMPONENTS atomic REQUIRED)                                                                                                                                                               

原来Boost_LIBRARYDIR是在我调用cmake时定义的。删除CMakeCache.txt文件，问题就解决了。我想我可能已经设置了Boost_LIBRARYDIR当我试图使它工作，它被缓存。FindBoost。当Boost_LIBRARYDIR被定义后，cmake将退出。然而，这个错误消息确实具有误导性。