问题描述：
在编译ros工程时候，出现下面错误

CMake Error at /home/nvidia/deepstream_workspace/ros_to_deepstream/build/ros_to_deepstream/cmake/ros_to_deepstream-genmsg.cmake:3 (message):
Could not find messages which
‘/home/nvidia/deepstream_workspace/ros_to_deepstream/src/ros_to_deepstream/msg/TrafficLightRoi.msg’
depends on. Did you forget to specify generate_messages(DEPENDENCIES …)?
Cannot locate message [RegionOfInterest]: unknown package [sensor_msgs] on
search path [{{‘ros_to_deepstream’:

原因分析

unknown package [sensor_msgs] onsearch path [{{‘ros_to_deepstream’:
这个sensor_msgs是个通用公共的消息，你的工程CMakeFiles没有添加相应语句。

解决办法

在find_package里添加sensor_msgs

find_package(catkin REQUIRED COMPONENTS
  rospy
  std_msgs
  sensor_msgs
  geometry_msgs
  trajectory_msgs
  message_generation
)
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在generate_messages里添加sensor_msgs

generate_messages(
  DEPENDENCIES
  std_msgs
  sensor_msgs
  geometry_msgs
  trajectory_msgs
)

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再次编译

catkin_make
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