trying to contribute but got an error during the setup

[Stéphane Archer]

Dear Gnu Coreutils community,

I tried to compile the repo on my mac to contribute to the project.
I have the following error:
clang: error: no such file or directory: './lib/parse-datetime.c'
clang: error: no input files
I have the file test-parse-datetime.c but not parse-datetime.c, I'm not
sure how to get it.
Does anyone know?

I'm currently trying to contribute to mv so maybe I can just call something
like make mv and start playing around?

-- 
Best Regards,

Stephane Archer