How to add binary third party libraries in qt creator (Ubuntu-sdk verison of QT-Creator)

I try to write an app for ubuntu unity8 and i use a third party library in that app.

My problem is that i would like to use the binary version of that library in my app and not the source files of it.

How can i add the binary version of that library into qtcreator so that the library is accessible in my cpp files in the app via:

#include <header.h>

I tried by using add_library(binary_file) in the CMakeLists.txt . But that did not work.

So i need to know, what is the correct way to use third party binary libraries in a ubuntu unity 8 app. What files do i need to change?