CMakeList 创建节点遇到问题

1、CMake Warning at lidar_localization/CMakeLists.txt:90 (add_executable):
Cannot generate a safe runtime search path for target back_end_node because
files in some directories may conflict with libraries in implicit
directories:

runtime library [libpcl_common.so.1.7] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
  /usr/local/lib

2、CMake Warning at lidar_localization/CMakeLists.txt:98 (add_executable):
Cannot generate a safe runtime search path for target viewer_node because
files in some directories may conflict with libraries in implicit
directories:

runtime library [libpcl_common.so.1.7] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
  /usr/local/lib

3、CMake Warning at lidar_localization/CMakeLists.txt:114 (add_executable):
Cannot generate a safe runtime search path for target
gnss_ins_sim_filtering_node because files in some directories may conflict
with libraries in implicit directories:

4、 Cannot generate a safe runtime search path for target eskf_preprocess_node
because files in some directories may conflict with libraries in implicit
directories:

runtime library [libpcl_common.so.1.7] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
  /usr/local/lib

5、CMake Warning at lidar_localization/CMakeLists.txt:82 (add_executable):
Cannot generate a safe runtime search path for target lidar_preprocess_node
because files in some directories may conflict with libraries in implicit
directories:

runtime library [libpcl_common.so.1.7] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
  /usr/local/lib

6、CMake Warning at lidar_localization/CMakeLists.txt:75 (add_executable):
Cannot generate a safe runtime search path for target test_frame_node
because files in some directories may conflict with libraries in implicit
directories:

runtime library [libpcl_common.so.1.7] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
  /usr/local/lib

7、WARNING: Package name “LaserUndistortion” does not follow the naming conventions. It should start with a lower case letter and only contain lower case letters, digits, underscores, and dashes.

原因:add_executable(viewer_node src/apps/viewer_node.cpp ${ALL_SRCS})
add_dependencies(viewer_node ${catkin_EXPORTED_TARGETS} ${PROJECT_NAME}_generate_messages_cpp)
target_link_libraries(viewer_node ${catkin_LIBRARIES} A L L T A R G E T L I B R A R I E S ) 有 部 分 漏 了 {ALL_TARGET_LIBRARIES}) 有部分漏了 ALLTARGETLIBRARIES){PROJECT_NAME}_generate_messages_cpp

<think>好的,用户问的是ROS 2编写节点是否需要CMakeLists.txt文件。首先,我需要回忆ROS 2的构建系统。ROS 2主要使用ament_cmake和colcon作为构建工具,而CMakeLists.txt是ament_cmake的一部分。 接下来,用户可能不太清楚ROS 2与ROS 1的区别。在ROS 1中,catkin确实需要CMakeLists.txt来编译节点,而ROS 2延续了类似的做法,但改用了ament。所以,对于C++节点来说,CMakeLists.txt仍然是必需的,因为它负责编译可执行文件和链接依赖库。 然后,Python节点的情况不同。Python是解释型语言,不需要编译,所以理论上不需要CMakeLists.txt。但ROS 2的package.xml需要声明Python的依赖和入口点,这时候可能用setup.py或setup.cfg,特别是在使用ament_python构建类型时。不过,用户如果只写Python节点,可能不需要直接处理CMakeLists.txt,但构建系统可能仍然涉及一些配置。 用户的问题可能隐含更深层的需求,比如他们可能正在开始一个项目,不确定如何配置,或者遇到了构建错误。需要分情况说明:C++必须用CMakeLists.txt,Python通常用setup.py,但包的结构可能会影响是否需要间接使用CMake。 另外,需要提醒用户,即使使用Python,整个ROS 2包的结构仍然需要符合一定的规范,比如package.xml和正确的文件布局。可能还要提到colcon build的工作流程,以及如何通过CMakeLists.txt来安装Python脚本,虽然这不是必须的,但有时为了方便会这样做。 最后,要确保回答清晰,步骤明确,让用户知道不同情况下的处理方法,避免混淆。可能需要总结要点,强调C++和Python的不同,并给出示例,比如创建包时的命令参数(--build-type ament_cmake或ament_python),这样用户能更好理解何时需要CMakeLists.txt。</think>在ROS 2中编写节点时,是否需要`CMakeLists.txt`文件取决于你使用的编程语言和构建类型,具体分为以下两种情况: --- ### 一、使用C++编写节点:必须使用`CMakeLists.txt` 1. **编译需求** C++代码需要编译为可执行文件,因此必须通过`CMakeLists.txt`定义: ```cmake find_package(rclcpp REQUIRED) add_executable(my_node src/my_node.cpp) target_link_libraries(my_node rclcpp::rclcpp) install(TARGETS my_node DESTINATION lib/${PROJECT_NAME}) ``` 2. **构建系统依赖** ROS 2使用`ament_cmake`构建工具链,`CMakeLists.txt`是定义包依赖、编译规则和安装目标的核心文件。 --- ### 二、使用Python编写节点:无需`CMakeLists.txt` 1. **解释型语言特性** Python代码无需编译,可通过`setup.py`或`setup.cfg`直接声明入口点: ```python from setuptools import setup setup( entry_points={ 'console_scripts': ['my_node = my_package.my_node:main'] } ) ``` 2. **构建类型选择** 创建Python包时应指定`--build-type ament_python`: ```bash ros2 pkg create my_py_pkg --build-type ament_python ``` --- ### 三、关键差异总结 | 语言 | 需要CMakeLists.txt? | 核心配置文件 | |-------|---------------------|----------------------| | C++ | ✅ 必需 | CMakeLists.txt | | Python| ❌ 不需要 | setup.py + package.xml | --- ### 四、操作建议 1. **创建包时明确构建类型** ```bash # C++包 ros2 pkg create my_cpp_pkg --build-type ament_cmake # Python包 ros2 pkg create my_py_pkg --build-type ament_python ``` 2. **混合语言包的特殊情况** 若同时包含C++和Python代码,仍需保留`CMakeLists.txt`以处理C++部分的编译。 通过以上分层设计,ROS 2实现了对不同语言节点的灵活支持。建议根据实际开发语言选择对应的构建方式。
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