Implement CMake/packaging support

[alessandrogario]

This PR implements initial CMake support. Packaging with CPack is also available, and can be triggered with sudo make package

[Dor1s]

Thanks for the patch! I'm a bit unclear on what's the intention here. Do you want to get rid of Makefile and use CMake instead? Why is it needed, besides the packaging capability?

[alessandrogario]

Thanks for the patch! I'm a bit unclear on what's the intention here. Do you want to get rid of Makefile and use CMake instead? Why is it needed, besides the packaging capability?

Hello @Dor1s!

My main goals were:

1. Add packaging support
2. Have a CMakeList.txt file that I can open with an IDE (QtCreator, CLion, etc)
3. Allow projects to add_subdirectory(afl) (where afl is a git submodule pointing here)
4. Add helpers so that from a CMake project a user can create afl targets

I can close the PR if this does not align with the guidelines/roadmap.

Thanks! 😄

EDIT: Just in case, I still have to add a couple of commits!

[Dor1s]

@alessandrogario thanks for the clarifications! This definitely makes sense, but I'd rather hold on for some time and consider doing this later as a planned effort (e.g. maybe with or after some other refactoring / code structure changes).

I'm sorry for rejecting this PR right now, but let me open an issue for CMake support and mention this as a starting point. Hopefully we (and/or you) can get back to this later :)