OpenCV 4 for Arch based Linux distros

Mar 14, 2020 • system

Install OpenGL extensions for GTK+ , hdf5 and vtk:

$  sudo pacman -S gtkglext hdf5 vtk

Install build-essential equivalent in Arch Linux, base-devel, and pkg-config:

$  sudo pacman -S base-devel pkg-config

Install OpenCV and OpenCV Samples:

$   sudo pacman -S opencv opencv-samples

Check the version of OpenCV to see if its correcly installed:

$   pkg-config --modversion opencv4

Locate pkgconfig and set the pkg-config path in /etc/bash.bashrc:

$   echo "export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/lib/pkgconfig" | sudo tee --append /etc/bash.bashrc

Write a config file that helps ldconfig locate the OpenCV libraries:

$   echo "/usr/include/opencv4" | sudo tee --append /etc/ld.so.conf.d/opencv4.conf

Creates the links

$   sudo ldconfig -v

In the same directory of the .cpp create a file called Makefile with the following code:

CFLAGS = `pkg-config --cflags opencv4`
LIBS = `pkg-config --libs opencv4`

% : %.cpp
	g++ $(CFLAGS) $(LIBS) -o $@ $<

To compile:

$ make program-name

To run:

$ ./program-name