Undefined reference to face_detection

[alexmotoc]

Hello! I am interested in using your code for face segmentation in a university project. However I am running into a compilation error:

/tmp/ccgviTss.o: In function `main': main.cpp:(.text+0x63): undefined reference to `face_detection(cv::Mat&)' . collect2: error: ld returned 1 exit status

I don't understand why that is because the function is clearly declared and defined. I was running into similar issues with the cv and boost functions but I managed to fix that by linking the libraries. The command I am running is:

!g++ main.cpp -o main -lboost_system `pkg-config --cflags --libs opencv`

I am running this from a Google Colaboratory notebook and all of the dependencies should have been installed successfully.