Configuring the project for Linux

OpenCV binaries are certainly available in official software repositories. Depending on your distribution and your package manager, you can install it with commands such as the following:

# On Debian system    
apt-get install libopencv-dev

# On Red Hat system
yum install opencv

When OpenCV is installed on your Linux, you can add this snippet to the filter-plugin-designer.pro file:

linux { 
    target.path = $$(QTDIR)/../../Tools/QtCreator/lib/Qt/plugins/designer/ 
     CONFIG += link_pkgconfig 
    PKGCONFIG += opencv 
} 

This time, we do not use the LIBS variable but PKGCONFIG, which relies on pkg-config.

It is a helper tool that will insert the correct options into the compile command line. In our case, we will request pkg-config to link our project with OpenCV.

You can list all the libs managed by pkg-config with the pkg-config --list-all...