Question

在我的项目中，我想将xbee external library与ROS一起使用。最初当我制作exe文件时我使用makefile。但由于ROS使用catkin，我必须使用Cmakelists.txt创建exe文件但我仍然坚持同样的错误undefined reference ..，即使我遵循了所有方向。

My Project的目录结构如下所示。

.
├── xbee_ansic_library
    ├── include - 3 subdirectories have h file
        ├── wpan
        ├── xbee
        └── zigbee
    ├── src - subdirectories have c file
        ├── wpan
        ├── xbee
        └── zigbee            
└── my_project
        ├── src
            └── main.cpp
        └── CMakeLists.txt

由于原始的makefile看起来像this，我写了my_project / CmakeLists.txt，如下所示。

project(my_project)

## Declare a catkin package
catkin_package()

# %EndTag(FULLTEXT)%

include_directories(include ${catkin_INCLUDE_DIRS})
include_directories(~/catkin_ws/src/xbee_ansic_library/include)
include_directories(~/catkin_ws/src/my_project/include)

LINK_DIRECTORIES(~/catkin_ws/src/xbee_ansic_library/src)
LINK_DIRECTORIES(~/catkin_ws/src/my_project/src)

add_library(base_OBJECTS 
${xbee_ansic_library_SRC_POSIX}/xbee_platform_posix.c 
${xbee_ansic_library_SRC_POSIX}/xbee_serial_posix.c
${xbee_ansic_library_SRC_UTIL}/hexstrtobyte.c  
${xbee_ansic_library_SRC_UTIL}/memcheck.c 
${xbee_ansic_library_SRC_UTIL}/swapbytes.c 
${xbee_ansic_library_SRC_UTIL}/swapcpy.c 
${xbee_ansic_library_SRC_UTIL}/hexdump.c src/parse_serial_args.c)

add_library(xbee_OBJECTS 
${base_OBJECTS} 
${xbee_ansic_library_SRC_WPAN}/wpan_types.c
${xbee_ansic_library_SRC_XBEE}/xbee_device.c 
${xbee_ansic_library_SRC_XBEE}/xbee_atcmd.c)

....


add_executable(main src/main.cpp)
target_link_libraries(main ${catkin_LIBRARIES} main_OBJECTS)
add_dependencies(main my_project_generate_messages_cpp)

但是当我用catkin_make命令时，我收到了错误

CMakeFiles / main.dir / src / main.cpp.o：在函数main': main.cpp:(.text+0x177): undefined reference to中xbee_dev_dump_settings' collect2：错误：ld返回1退出状态

但是xbee_dev_dump_settings位于xbee_ansic_library/include/xbee/device.h，xbee_ansic_library/src/xbee/xbee_device.c。由于错误undefined reference ..没有，not declared ..我觉得我在标题方面做得很好。

接下来应该做什么？

Answer 1

错误发生在链接阶段，因此可能与您的target_link_libraries行有关。我相信它还应该指定您创建的xbee和基本库，因此将其更改为：

target_link_libraries(main ${catkin_LIBRARIES} base_OBJECTS xbee_OBJECTS)

使用Cmakelists.txt进行未定义的引用

1 个答案: