#定义函数，把文件夹下所有子文件夹保存在变量中
macro(list_sub_dir RESULT CUR_DIR FILTER_LIST)
    file(GLOB_RECURSE CHILDREN LIST_DIRECTORIES true  ${CUR_DIR}/*)
    set(DIR_LIST ${CUR_DIR})
    foreach(CHILD ${CHILDREN})
        if(IS_DIRECTORY ${CHILD})
            set(ADD_FLAG ON)
            foreach(FILTER ${FILTER_LIST})
                string(FIND "${FILTER}" "${CHILD}" RET)
                if(${RET} EQUAL -1)
                    set(ADD_FLAG OFF)
                endif()
            endforeach()
            if(${ADD_FLAG})
                list(APPEND DIR_LIST ${CHILD})
            endif()
            unset(ADD_FLAG)
        endif()
    endforeach()
    set(${RESULT} ${DIR_LIST})
endmacro()

#自动添加子目录下的CMakeLists
file(GLOB SUB_DIRS RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/*)
foreach(DIR ${SUB_DIRS})
    if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${DIR}/CMakeLists.txt)
        add_subdirectory(${DIR})
    endif()
endforeach()