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Cmake error during building a rospackage

asked 2018-04-27 00:59:56 -0500

aditya369007 gravatar image

Hello all

I am trying to learn how to use the ROS-PCL library with the Velodyne 64E lidar. I have stored my code in the same directory as that of the Velodyne_height_map project and I want to modify the existing CMakeList.txt file to incorporate my own code. My main goal is to find the distances of the obstacles by subscribing to the velodyne_obstacles topic.

This is the error I am getting when I am building the project.

>  *** No rule to make target
> '/usr/lib/x86_64-linux-gnu/',
> needed by
> '/home/aditya/catkin_ws/devel/lib/velodyne_height_map/myheight'.
> Stop.

This is the addition I have done to the CMakeLists.txt file by following few tutorials.

add_executable(myheight src/my_height_sub.cpp)
target_link_libraries(myheight ${catkin_LIBRARIES}${catkin_LIBRARIES}

This is the program I am trying to run.

#include <ros/ros.h>
#include <pcl_ros/point_cloud.h>
#include <pcl/point_types.h>
#include <boost/foreach.hpp>

typedef pcl::PointCloud<pcl::PointXYZ> PointCloud;

void callback(const sensor_msgs::PointCloud2ConstPtr&);

int main(int argc, char** argv)
    ros::NodeHandle nh;
    std::string topic = nh.resolveName("point_cloud");
    uint32_t queue_size = 1;

    // to create a subscriber, you can do this (as above):
    ros::Subscriber sub = nh.subscribe<sensor_msgs::PointCloud2> ("velodyne_points", queue_size, callback);

I know I am missing some dependencies in the CMakelists, but cant seem to figure out what they are. Can someone help me out please? Many thanks in advance!

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I'm no expert on this, but it seems that pcl_ros_filter (which is in your error message) cannot be used. Why this should be linked, however, I don't know. I don't see anything apparent relating to that.

mgruhler gravatar image mgruhler  ( 2018-04-27 01:14:23 -0500 )edit

Thats what I am unable to understand, I have not used pcl_ros_filter still this is showing up. But I have still added ${PCL_ROS_FILTER} in the link libraries, but still I am facing the same error.

aditya369007 gravatar image aditya369007  ( 2018-04-27 01:21:21 -0500 )edit

Can you paste the entire CMakeList.txt(without the comments)?

robotchicken gravatar image robotchicken  ( 2018-04-27 01:25:56 -0500 )edit


It is attached here

aditya369007 gravatar image aditya369007  ( 2018-04-27 01:35:58 -0500 )edit

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answered 2018-04-27 02:07:45 -0500

robotchicken gravatar image

updated 2018-04-27 02:11:44 -0500

/usr/lib/x86_64-linux-gnu/ This path seems super wierd. Can you paste the result of "echo $LD_LIBRARY_PATH" on you terminal.

Was this a CmakeList.txt file written by you? can you try changing to:

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In function main': /home/aditya/catkin_ws/src/velodyne_height_map/src/my_height_sub.cpp:16: undefined reference tocallback(boost::shared_ptr<sensor_msgs::pointcloud2_<std::allocator<void> > const> const&)'

I got this error now I think its a programming error. Will rectify it

aditya369007 gravatar image aditya369007  ( 2018-04-27 02:11:33 -0500 )edit

And no this was not written by me

aditya369007 gravatar image aditya369007  ( 2018-04-27 02:11:56 -0500 )edit

Yup, i think you need to define the function callback.

robotchicken gravatar image robotchicken  ( 2018-04-27 02:18:30 -0500 )edit

Mark as resolved if it works out.

robotchicken gravatar image robotchicken  ( 2018-04-27 02:35:09 -0500 )edit

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Asked: 2018-04-27 00:59:56 -0500

Seen: 260 times

Last updated: Apr 27 '18