【77】linux module 的makefile

待我称王封你为后i 2022-10-16 07:50 186阅读 0赞

![在这里插入图片描述][2021052811310866.png]  
目录结构大概是着这样的  
code->一级目录  
\----include->二级目录，存放头文件  
\--------hw->三级目录，存放hardware相关的头文件  
\----src->二级目录，存放源码  
\--------hw->三级目录，存放hardware相关的源码

PWD:=$(shell pwd)
    KBUILD_EXTRA_SYMBOLS += /usr/src/linux-headers-$(shell uname -r)/Module.symvers
    export KBUILD_EXTRA_SYMBOLS
    EXTRA_CFLAGS +=-Wno-date-time
    ################################头文件目录########################################
    EXTRA_CFLAGS += -I$(PWD)/../include
    EXTRA_CFLAGS += -I$(PWD)/../include/hw
    EXTRA_CFLAGS += -I$(PWD)/hw
    ############module name需要修改，比如pcieaer，最后会编译出pcieaer.ko##############
    MODULE_NAME = pcieaer
    ############module object需要根据生产object的依赖关系修改##############
    $(MODULE_NAME)-objs += hw/pcieaer_tcs81.o \
    						pcieaer_hw_adapter.o \
    						pcieaer_poll.o \
    						pcieaer_init.o \
    						pcieaer_errprint.o
    
    ifneq  ($(KERNELRELEASE),)
    	obj-m += $(MODULE_NAME).o
    else
    	KDIR := /lib/modules/$(shell uname -r)/build
    	#PWD:=$(shell pwd)
    all:
    	$(MAKE_BEGIN)
    	@echo "EXTRA_SYMBOLS: $(KBUILD_EXTRA_SYMBOLS)"
    	make -C $(KDIR) M=$(PWD) $(EXTRA_CFLAGS) $(KBUILD_EXTRA_SYMBOLS) modules
    	$(MAKE_DONE)
    clean:
    	$(CLEAN_BEGIN)
    	rm -f *.ko *.o *.symvers *.cmd *.cmd.o
    	$(CLEAN_END)
    endif
    
    CLEAN_BEGIN=@echo "++++++++++++++++Now, Cleaning up ...++++++++++++++++"
    CLEAN_END=@echo "++++++++++++++++Clean Done.++++++++++++++++"
    
    MAKE_BEGIN=@echo "++++++++++++++++Now, Compiling ...++++++++++++++++"
    MAKE_DONE=@echo "++++++++++++++++Compile Job done.++++++++++++++++"

关于EXTRA\_CFLAGS可以参考这篇文档  
https://www.huaweicloud.com/articles/509ada5d8900bc0134de1f0ffbea133c.html

[2021052811310866.png]: /images/20221014/85a5ea305ada4035998c7004e1fab25f.png