Makefile Tutorial by Example(makefiletutorial.com)

    This makefile will always run. The default target is some_binary,    
    because it is first.

    some_binary:
	echo "nothing"

    1) We do not use *.o, because that is just the string *.o, 
    which might be useful in the commands, but is only one 
    target and does not expand."

    *.foo: ; @echo $@

    $ echo 'int main() {}' >foo.c
    $ make foo