> This is a red flag. If you're hoping to write functions with cmake... You're doing it wrong. Very wrong. You add targets, and you add rules to the target. If you find yourself wanting to do anything other than this then you should take a step back and read a modern cmake tutorial again, because odds are you're doing it wrong.

so how do you propose to do code generation, parsing stuff like /etc/lsb_release to work around a bug for people building under ubuntu 16.04, or that kind of thing ?