linux - Makfile 选项的含义

Question

Makefile 的规则如下 -

SUBDIRS = foo bar baz

 subdirs:
         for dir in $(SUBDIRS); do \
           $(MAKE) -C $$dir; \
         done

里面有选项-C。谁能告诉我这个选项的作用是什么？

谢谢!

Answer 1

 -C dir, --directory=dir
            Change to directory dir before reading the makefiles or doing anything else.  If multiple -C options are specified, each is interpreted relative to the previous one: -C  /  -C  etc  is
            equivalent to -C /etc.  This is typically used with recursive invocations of make.