GitLab

Hello,
I'm really a noob with GitLab and even in programming. Our teachers asked us to make a git group and to create a project. I did it with CLion and everything works well but they also ask us to add this :
build1:
    stage: build
    script:
       - make
In a .gitlab-ci.yml file. And auto-compilation (I think is the purpose of this file ) doesn't work because (I think, CLion use another kind of makfile). If someone knows how to do something equivalent I would be very grateful.