Error of installing OpenCV 4.2.0

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hello! I’ve got a problem with the installation of OpenCV 4.2.0 in Ubuntu 18.04.
After finishing the step: ‘& sudo make install’ I’ve finished the installation of OpenCV, but when I am trying to test if OpenCV works well by using the test internal ‘drawing.cpp’, it made a lot of mistakes, like this:

bako@bako-desktop:~/OpenCV/opencv-4.2.0/samples/cpp$ g++ drawing.cpp -o drawing pkg-config opencv --libs --cflags
Package opencv was not found in the pkg-config search path.
Perhaps you should add the directory containing `opencv.pc’
to the PKG_CONFIG_PATH environment variable
No package ‘opencv’ found
drawing.cpp:1:10: fatal error: opencv2/core.hpp: No such file or directory
#include “opencv2/core.hpp”
^~~~~~~~~~~~~~~~~~
compilation terminated.

How can I solve this king of question? Did I forget any necessary steps during the installation?
I am looking for your answer. Thank you!

2

Please do check whether this header file is installed on the system.

If yes, then please check if this path is included during code compilation.

3

You may need to add this to your build script, as mentioned here

-D OPENCV_GENERATE_PKGCONFIG=YES

I haven’t verified by testing, but that may be the only flag you need for pkgconfig support.