Makefile learn the rules for emptying target files

Each makefile should write a rule that clears the target file (. O and Execute file), which is not only easy to recompile, but also helps keep the file clean. This is a "culture" (hehe, remember my "programming accomplishment").
The general style is:

Clean
RM Edit $ (objects)

A more robust approach is to:

. Phony:clean
Clean:
-RM Edit $ (objects)

As I said before. Phony means that clean is a "pseudo-target". and a small minus sign in front of the RM command means that some files may be in trouble, but don't worry, keep doing what's behind. Of course, clean rules do not put in the beginning of the file, otherwise, it will become the default goal of make, I believe that no one is willing to do so. The unwritten rule is that "clean is always at the end of the file."


Above is a makefile of the general picture, is also the basis of makefile, there are many makefile the relevant details, ready to do. Come when you are ready.