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创建ROS消息和ROS服务

1.创建完msg,编译过程中出现如下错误:

CMake Error at beginner_tutorials/CMakeLists.txt:51 (add_message_files):

Unknown CMake command “add_message_files”. – Configuring incomplete, errors occurred! See also “/home/jack/my_ws/build/CMakeFiles/CMakeOutput.log”. See also “/home/jack/my_ws/build/CMakeFiles/CMakeError.log”. Makefile:696: recipe for target ‘cmake_check_build_system’ failed make: *** [cmake_check_build_system] Error 1 Invoking “make cmake_check_build_system” failed

$解决过程:$

• 经检查,在 CMakeLists.txt文件中的find_packag函数中忘了增加对message_generation的依赖,修改完后编译成功.
  
  

2.创建完srv,编译出现以下错误

– ==> add_subdirectory(beginner_tutorials)

CMake Error: Error in cmake code at /home/jack/my_ws/src/beginner_tutorials/CMakeLists.txt:199: Parse error. Function missing ending “)”. End of file reached. – Configuring incomplete, errors occurred! See also “/home/jack/my_ws/build/CMakeFiles/CMakeOutput.log”. See also “/home/jack/my_ws/build/CMakeFiles/CMakeError.log”. Makefile:696: recipe for target ‘cmake_check_build_system’ failed make: *** [cmake_check_build_system] Error 1 Invoking “make cmake_check_build_system” failed

$解决过程:$

• 仔细观察,原来是函数少了个括号,修改后,编译成功
  
  

总结

• 细心很重要 !

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