To be fair, dependency tracking is properly a function of the compiler, you can't do it in make alone without the ability to parse the language. And it's not 10-20 lines. GCC and clang both support the -M family of arguments that do this for you. It's a matter of running it to generate some sort of dependency file and including it in the makefile.
Yes, that's annoying and definitely a problem with the inclusion-based dependency model of C. But really it's not such a big deal.
Yes, that's annoying and definitely a problem with the inclusion-based dependency model of C. But really it's not such a big deal.