GNU make manual 翻译( 一百零三)

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Now you can say just `make' to remake all three programs, or specify as

arguments the ones to remake (as in `make prog1 prog3').  Phoniness is

not inherited: the prerequisites of a phony target are not themselves

phony, unless explicitly declared to be so.



   When one phony target is a prerequisite of another, it serves as a

subroutine of the other.  For example, here `make cleanall' will delete

the object files, the difference files, and the file `program':



     .PHONY: cleanall cleanobj cleandiff



     cleanall : cleanobj cleandiff

             rm program



     cleanobj :

             rm *.o



     cleandiff :

             rm *.diff

现在你可以仅仅输入 make 来重新构建所有这三个程序，或者知道指定参数来构建一部分(例如 make prog1 prog2)，伪目的不能继承：伪目的的前提条件不能是伪目的，除非明确地进行了如此的宣言。

当一个伪目的是另一个伪目的的前提条件时，它就像是另一个的子程序一样进行工作。例如，这里的 make cleanall 将删除目标文件，差异文件和 program文件:

.PHONY: cleanall cleanobj cleandiff

cleanall : cleanobj cleandiff
rm program

cleanobj :
rm *.o

cleandiff :
rm *.diff

后文待续