If you know this awesome XKCD comic, you will like this makefile.
me a:
@true
sandwich.:
ifeq ($(shell if touch / 2> /dev/null; then id -u; fi),0)
@echo "Okay."
else
@echo "What? Make it yourself."
endif
.PHONY: me a sandwich.
Copy this to a file called Makefile.
Nerd enjoy.
Letzter Senf