Why does this makefile execute a target on 'make clean?

It's because the . D files are being -include d unconditionally. As far as make knows, they could add dependencies or commands to the clean target.

All include d files are built first for this reason, otherwise you might get an incorrect or failed build. To disable this, you want to conditionally include the dependency files.

It wants to regenerate the dependency files because it always tries to regenerate all of the makefiles, including -include'd makefiles, before doing anything else. (Well, actually, for me it doesn't do that - I have GNU Make 3.81 - so maybe it's a bug in your version that was fixed, or an optimization that mine has and yours doesn't. But anyway.).

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.