当尝试获取Target Link Libraries信息时,获取属性返回空变量

Question

我在CMake中有一些调试信息,以检查我是否添加了编译项目所需的信息.这段代码很有效:

 # Include DIRECTORIES
  GET_PROPERTY(dirs DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY INCLUDE_DIRECTORIES)
  FOREACH(dir ${dirs})
    MESSAGE(STATUS " * Include directory: '${dir}'")
  ENDFOREACH()

但是当我尝试检查当前项目中链接的所有库时,我得到一个空变量:

# Linking against
      GET_PROPERTY(libtargets DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY LINK_LIBRARIES)
      MESSAGE("Libs: ${libtargets}")
      FOREACH(libtarget ${libtargets})
        MESSAGE(STATUS " * Target Link library: '${libtarget}'")
      ENDFOREACH()

检查CMake文档3.0似乎没问题,但我不知道有哪些值可供阅读.我打印信息AFTER make ADD_LIBRARY/ADD_EXECUTABLE

LINK_LIBRARIES是否为GET_PROPERTY的值不正确？我怎么能得到这些信息？

Answer 1

目录LINK_LIBRARIES根据此页面没有该属性:

http://www.cmake.org/cmake/help/v3.0/manual/cmake-properties.7.html?highlight=properties%20targets#properties-on-directories

另外我认为target_link_libraries只会对调用它的目标有效,而不是在目录上.请尝试使用get_target_property.