在ARM64位板子上测试软件时，编译了realsense相机的ROS2程序，编译过程中报错了，大概意思是系统内存耗尽，想到可能是自己选用的4G+32G的板子可能性能确实不够。

环境：Ubuntu22.04 aarch64

报错内容

forlinx@ok3588:~/realsense_ws$ source /opt/ros/humble/setup.bash 
forlinx@ok3588:~/realsense_ws$ colcon build
[0.766s] WARNING:colcon.colcon_core.prefix_path.colcon:The path '/home/forlinx/Downloads/realsense_ws/install' in the environment variable COLCON_PREFIX_PATH doesn't exist
[0.767s] WARNING:colcon.colcon_ros.prefix_path.ament:The path '/home/forlinx/Downloads/realsense_ws/install/realsense2_description' in the environment variable AMENT_PREFIX_PATH doesn't exist
[0.767s] WARNING:colcon.colcon_ros.prefix_path.ament:The path '/home/forlinx/Downloads/realsense_ws/install/realsense2_camera' in the environment variable AMENT_PREFIX_PATH doesn't exist
[0.767s] WARNING:colcon.colcon_ros.prefix_path.ament:The path '/home/forlinx/Downloads/realsense_ws/install/realsense2_camera_msgs' in the environment variable AMENT_PREFIX_PATH doesn't exist
[0.767s] WARNING:colcon.colcon_ros.prefix_path.catkin:The path '/home/forlinx/Downloads/realsense_ws/install/realsense2_description' in the environment variable CMAKE_PREFIX_PATH doesn't exist
[0.767s] WARNING:colcon.colcon_ros.prefix_path.catkin:The path '/home/forlinx/Downloads/realsense_ws/install/realsense2_camera' in the environment variable CMAKE_PREFIX_PATH doesn't exist
[0.767s] WARNING:colcon.colcon_ros.prefix_path.catkin:The path '/home/forlinx/Downloads/realsense_ws/install/realsense2_camera_msgs' in the environment variable CMAKE_PREFIX_PATH doesn't exist
Starting >>> realsense2_camera_msgs
Finished <<< realsense2_camera_msgs [11.0s]                       
Starting >>> realsense2_camera
Starting >>> realsense2_description
Finished <<< realsense2_description [1.85s]                                                                
[Processing: realsense2_camera]                             
--- stderr: realsense2_camera                                   
c++: fatal error: Killed signal terminated program cc1plus
compilation terminated.
gmake[2]: *** [CMakeFiles/realsense2_camera.dir/build.make:132: CMakeFiles/realsense2_camera.dir/src/ros_sensor.cpp.o] Error 1
gmake[2]: *** Waiting for unfinished jobs....
c++: fatal error: Killed signal terminated program cc1plus
compilation terminated.
gmake[2]: *** [CMakeFiles/realsense2_camera.dir/build.make:104: CMakeFiles/realsense2_camera.dir/src/parameters.cpp.o] Error 1
c++: fatal error: Killed signal terminated program cc1plus
compilation terminated.
gmake[2]: *** [CMakeFiles/realsense2_camera.dir/build.make:90: CMakeFiles/realsense2_camera.dir/src/base_realsense_node.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:159: CMakeFiles/realsense2_camera.dir/all] Error 2
gmake: *** [Makefile:146: all] Error 2
---
Failed   <<< realsense2_camera [58.5s, exited with code 2]

Summary: 2 packages finished [1min 10s]
  1 package failed: realsense2_camera
  1 package had stderr output: realsense2_camera

错误原因分析

  内存不足：编译过程中系统内存（RAM）耗尽，导致操作系统终止了编译进程（cc1plus 是 C++ 编译器的一部分）。在嵌入式设备（使用的 RK3588 开发板）上，内存资源有限，编译大型项目时容易出现这种情况。

解决方法

1.增加可用内存（已验证解决）

使用交换分区（swap）：如果设备内存较小，可以创建临时交换分区来增加虚拟内存：

# 创建一个2GB的交换文件
sudo dd if=/dev/zero of=/swapfile bs=1M count=2048
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile

# 编译完成后可以关闭交换分区（可选）
# sudo swapoff /swapfile
# sudo rm /swapfile

做完上面这一步后编译成功。。。

2.减少并行编译任务

限制同时编译的线程数，减少内存占用：

colcon build --parallel-workers 1  # 只使用1个线程编译