make前grep CONFIG_DM9000 -nr . 1Makefile,如obj-$(CONFIG_DM9000) += dm9000.o(在auto.conf中定义) 2config文件,如CONFIG_DM9000=y 3.c文件,如if defined(CONFIG_DM9000) || defined(CONFIG_DM9000_MODULE) make后增加 4include/config/auto.conf,如CONFIG_DM9000=y(来源.config) 5include/linux/autoconf.h,如#define C