内核模块makefile中的SUBDIRS变量 [英] SUBDIRS variable in kernel module makefile

问题描述

考虑以下makefile:

Consider the following makefile:

CUR = $(shell uname -r) 
DIR = /lib/modules/$(CUR)/build 
PWD = $(shell pwd) 
obj-m   := m1.o m2.o 
default: 
        $(MAKE) -C $(DIR) SUBDIRS=$(PWD) modules 
clean: 
        @rm -f *.o .*.cmd .*.flags *.mod.c *.order 
        @rm -f .*.*.cmd *~ *.*~ TODO.* 
        @rm -fR .tmp* 
        @rm -rf .tmp_versions 
disclean: clean 
        @rm *.ko *.symvers

SUBDIRS 变量在内核模块makefile中是什么意思?

What does SUBDIRS variable mean in the kernel module makefile?

推荐答案

内核文件在Documentation/kbuild/modules.txt中说，

the kernel document says in Documentation/kbuild/modules.txt,

链接:

与M =相同.保留SUBDIRS =语法是为了向后兼容.

Same as M=. The SUBDIRS= syntax is kept for backwards compatibility.

并从Documentation/kbuild/kbuild.txt

and from Documentation/kbuild/kbuild.txt

链接:

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