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IntelRealSense / librealsense

Intel® RealSense™ SDK
https://www.intelrealsense.com/
Apache License 2.0
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Cmake error -DBUILD_PCL_EXAMPLES=true #6257

Open PerceptMD opened 4 years ago

PerceptMD commented 4 years ago
Required Info
Camera Model { R200 / F200 / SR300 / ZR300 / D400 }
Firmware Version (/)
Operating System & Version { Linux (Ubuntu 18.04)
Kernel Version (Linux Only) (4.15.0-96-generic)
Platform PC.
SDK Version {librealsense master bc64e52c9e128aa82cc9f25a14283bbe2bcf8828 }
Language {/}
Segment {/}

Issue Description

Previously I have successfully installed the debian librealsense packages via apt-get but now I needed to compile the PCL examples too. So I followed the "Linux manual installation guide". But calling cmake ../ -DBUILD_EXAMPLES=true -DBUILD_PCL_EXAMPLES=true resulted in the following error

CMake Error at wrappers/pcl/pcl-color/CMakeLists.txt:13 (find_package): By not providing "FindOpenCV.cmake" in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by "OpenCV", but CMake did not find one.

Could not find a package configuration file provided by "OpenCV" with any of the following names:

OpenCVConfig.cmake
opencv-config.cmake

Add the installation prefix of "OpenCV" to CMAKE_PREFIX_PATH or set "OpenCV_DIR" to a directory containing one of the above files. If "OpenCV" provides a separate development package or SDK, be sure it has been installed.

This could easily be solved by running sudo apt-get autoremove libopencv-dev python-opencv. Maybe this could be updated in the installation instructions at wrappers/pcl.

As I did not bother uninstalling the previous installation I also get the following warning now

Severity: Warn Description: Multiple realsense udev-rules were found! : 1:/etc/udev/rules.d/99-realsense-libusb.rules 2: /lib/udev/rules.d/60-librealsense2-udev-rules.rules Make sure to remove redundancies!

Any suggestions which version I can delete?

MartyG-RealSense commented 4 years ago

Thanks so much for the documentation feedback! I have put the 'Documentation' label on this case so that it can be tracked by the team members responsible for it.

In regard to the udev rules, I hope that the link below will be helpful.

https://github.com/IntelRealSense/librealsense/issues/4350#issuecomment-516548279

PerceptMD commented 4 years ago

sudo rm /lib/udev/rules.d/60-librealsense2-udev-rules.rules deleting "60-librealsense2-udev-rules.rules" fixes the warning and the realsense-viewer still seems to works like a charm.

Thanks for your great support. It is so great to learn about the usage of the realsense SDK here on github that I want to contribute as much as I can.

MartyG-RealSense commented 4 years ago

Awesome, I'm happy to know that your problem was fixed. Your enthusiasm for RealSense is really appreciated. Our community create amazing projects every day. :)

ev-mp commented 4 years ago

@PerceptMD , deleting files from Debians breaks the package integrity. You should ether delete the stand-alone file or the Debian packages altogether. Similar to https://github.com/IntelRealSense/librealsense/issues/6153#issuecomment-605687547

PerceptMD commented 4 years ago

Thanks for the advice. I've already deleted the "60-librealsense2-udev-rules.rules". So i should purge the Debian package "librealsense2-udev-rules"?