undefined reference to `cv::Mat::updateContinuityFlag()'

[fengziyue]

I merged the kimera semantics into kimera-vio-ros and excute "catkin build", this error occurs

Errors << pointcloud_recolor:make /home/parallels/catkin_ws/logs/pointcloud_recolor/build.make.012.log CMakeFiles/pointcloud_recolor.dir/src/pointcloud_recolor.cpp.o: In function PointcloudRecolor::recolorPointcloudWithImage(boost::shared_ptr<sensor_msgs::Image_<std::allocator<void> > const>, boost::shared_ptr<sensor_msgs::PointCloud2_<std::allocator<void> > const>)': pointcloud_recolor.cpp:(.text._ZN17PointcloudRecolor26recolorPointcloudWithImageEN5boost10shared_ptrIKN11sensor_msgs6Image_ISaIvEEEEENS1_IKNS2_12PointCloud2_IS4_EEEE[_ZN17PointcloudRecolor26recolorPointcloudWithImageEN5boost10shared_ptrIKN11sensor_msgs6Image_ISaIvEEEEENS1_IKNS2_12PointCloud2_IS4_EEEE]+0x111): undefined reference tocv::Mat::updateContinuityFlag()' collect2: error: ld returned 1 exit status make[2]: [/home/parallels/catkin_ws/devel/lib/pointcloud_recolor/pointcloud_recolor] Error 1 make[1]: [CMakeFiles/pointcloud_recolor.dir/all] Error 2 make: *** [all] Error 2 cd /home/parallels/catkin_ws/build/pointcloud_recolor; catkin build --get-env pointcloud_recolor | catkin env -si /usr/bin/make --jobserver-fds=6,7 -j; cd - ............................................................................... Failed << pointcloud_recolor:make [ Exited with code 2 ] Failed <<< pointcloud_recolor [ 2.2 seconds ] Abandoned <<< kimera_ros [ Unrelated job failed ] Abandoned <<< kimera_semantics [ Unrelated job failed ] Abandoned <<< voxblox_rviz_plugin [ Unrelated job failed ] Abandoned <<< voxblox_ros [ Unrelated job failed ] Abandoned <<< kimera_semantics_ros [ Unrelated job failed ] Finished <<< KimeraVIO [ 2.1 seconds ] Finished <<< voxblox [ 0.5 seconds ] [build] Summary: 40 of 46 packages succeeded.
[build] Ignored: 1 packages were skipped or are blacklisted.
[build] Warnings: 2 packages succeeded with warnings.
[build] Abandoned: 5 packages were abandoned.
[build] Failed: 1 packages failed.
[build] Runtime: 17.3 seconds total.

[ToniRV]

Hi @fengziyue,

Which opencv version are you using? I would recommend cloning in your workspace the opencv3_catkin package to make sure you are using the same opencv version across your packages.

Related issue: https://answers.opencv.org/question/198488/undefined-reference-to-cvmatupdatecontinuityflag/

Hope it helps.

[ToniRV]

• git: local-name: opencv3_catkin uri: https://github.com/ethz-asl/opencv3_catkin.git version: master

[fengziyue]

I just excuted this:

` mkdir -p ~/catkin_ws/src cd ~/catkin_ws/ catkin init

echo 'source ~/catkin_ws/devel/setup.bash' >> ~/.bashrc

cd ~/catkin_ws/src git clone git@github.com:MIT-SPARK/Kimera-VIO-ROS.git

wstool init

wstool merge Kimera-VIO-ROS/install/kimera_ros_ssh.rosinstall

cd ~/catkin_ws/ catkin config --extend /opt/ros/melodic catkin config --cmake-args -DCMAKE_BUILD_TYPE=Release catkin config --merge-devel

cd ~/catkin_ws/src git clone git@github.com:MIT-SPARK/Kimera-Semantics.git

wstool merge Kimera-Semantics/kimera/install/kimera_semantics_ssh.rosinstall

wstool update

catkin build`

is it right?

[fengziyue]

@ToniRV Hi

[ToniRV]

That looks good to me.

I think I found the issue: What we are missing here is that the pointcloud_recolor package should depend on opencv3_catkin Yet it depends on opencv2!

Just to check:

Do you have a system wide installation of opencv?

What do you get when you type ‘opencv_version’ in the same terminal you called ‘catkin build’?

Can you try to source your catkin workspace and try to compile again so that the opencv3_catkin is used?

[ToniRV]

Otw just change in the package.xml of pointcloud_recolor the build depend on opencv2 to opencv3_catkin. I’m away from keyboard now, but feel free to raise a pull request on pointcloud recolor if that solves the issue. Thanks anyway!

[fengziyue]

Yes, it solves the issue.

Thank you!