[seL4] about compile error

Dear Sir/Lady, This is a student from china, I am very interested in the sel4, works on the camkes, When I first compile the project camkes, I met a problem: camkes.c:502: undefined reference to `component_control_main' I know this means it not implemented this function, but this function seems produced by a auto method, so could you tell how to solve this problem? I follow the command: https://docs.sel4.systems/CAmkES/ to compile the :

repo init -u https://github.com/seL4/camkes-manifest.git