catkin_make Error | ROS Melodic OpenCV 3.4.0

[jnisa]

Hi,

After clonning the repository to my catkin workspace, and after make the installations required (python-scipy and pykalman), I performed the catkin_make and I got the following error:

[ 83%] Linking CXX executable /home/joao-nisa/catkin_ws/devel/lib/leg_tracker/detect_leg_clusters
[ 86%] Building CXX object leg_tracker/CMakeFiles/extract_positive_training_clusters.dir/src/laser_processor.cpp.o
CMakeFiles/detect_leg_clusters.dir/src/detect_leg_clusters.cpp.o: In function `DetectLegClusters::laserCallback(boost::shared_ptr<sensor_msgs::LaserScan_<std::allocator<void> > const> const&)':
detect_leg_clusters.cpp:(.text._ZN17DetectLegClusters13laserCallbackERKN5boost10shared_ptrIKN11sensor_msgs10LaserScan_ISaIvEEEEE[_ZN17DetectLegClusters13laserCallbackERKN5boost10shared_ptrIKN11sensor_msgs10LaserScan_ISaIvEEEEE]+0x6bc): undefined reference to `cv::ml::RTrees::getVotes(cv::_InputArray const&, cv::_OutputArray const&, int) const'
collect2: error: ld returned 1 exit status
leg_tracker/CMakeFiles/detect_leg_clusters.dir/build.make:226: recipe for target '/home/joao-nisa/catkin_ws/devel/lib/leg_tracker/detect_leg_clusters' failed
make[2]: *** [/home/joao-nisa/catkin_ws/devel/lib/leg_tracker/detect_leg_clusters] Error 1
CMakeFiles/Makefile2:830: recipe for target 'leg_tracker/CMakeFiles/detect_leg_clusters.dir/all' failed
make[1]: *** [leg_tracker/CMakeFiles/detect_leg_clusters.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[ 88%] Linking CXX executable /home/joao-nisa/catkin_ws/devel/lib/leg_tracker/train_leg_detector
[ 88%] Built target train_leg_detector
[ 91%] Linking CXX executable /home/joao-nisa/catkin_ws/devel/lib/leg_tracker/extract_positive_training_clusters
[ 91%] Built target extract_positive_training_clusters
Makefile:140: recipe for target 'all' failed
make: *** [all] Error 2
Invoking "make -j4 -l4" failed

I got the Melodic version of ROS and the OpenCV is the required, 3.4.0.

Can you help me to fix this problem?

Thanks in advance!

[angusleigh]

detect_leg_clusters.cpp:(.text._ZN17DetectLegClusters13laserCallbackERKN5boost10shared_ptrIKN11sensor_msgs10LaserScan_ISaIvEEEEE[_ZN17DetectLegClusters13laserCallbackERKN5boost10shared_ptrIKN11sensor_msgs10LaserScan_ISaIvEEEEE]+0x6bc): undefined reference to `cv::ml::RTrees::getVotes(cv::_InputArray const&, cv::_OutputArray const&, int) const'

The error is coming from this line: https://github.com/angusleigh/leg_tracker/blob/melodic/src/detect_leg_clusters.cpp#L216

I'm wondering if your OpenCV is properly installed and the version 3.4 is actually be called for compilation?

Can you try using this formula instead? https://github.com/angusleigh/leg_tracker/blob/melodic/src/detect_leg_clusters.cpp#L212 and deleting these lines https://github.com/angusleigh/leg_tracker/blob/melodic/src/detect_leg_clusters.cpp#L210-L220.

[jnisa]

It worked :) Thanks!

[hoppss]

cmakelists didnot include and link OpenCV for this project.