Use external library in Simulide project with mxe

I used the openCV library in the Simulide project.
In Ubuntu I was able to get it to work but compiling for Windows with Mxe it doesn't find the library.
I think I have to compile the library with Mxe and add the path in simulide.pro but I don't know how to do it, help!

You can have a look at previous versions using elf library and do something similar.