hello驱动模块交叉编译错误

KenZhang1031

海思交叉编译器，编译hello模块错误，linux内核目录在/root/hisi/Hi3531_SDK_V1.0.B.0/osdrv/kernel/linux-3.0.y，hello目录在/root/hisi/MyDriver/hello，里面的Makefile为：

1. PWD         := $(shell pwd)
   
2. KERNEL_DIR   = /root/hisi/Hi3531_SDK_V1.0.B.0/osdrv/kernel/linux-3.0.y
   
3. MODULE_NAME  = hello
   
4. ARCH = arm
   
5. CROSS_COMPILE = arm-hisiv200-linux-
   
6. CC    = $(CROSS_COMPILE)gcc
   
7. obj-m       := $(MODULE_NAME).o   
   
8. modules:
   
9.         make -C $(KERNEL_DIR) M=$(PWD) modules
   
10. clean:
    
11.         rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions
    
12. 
    
13. .PHONY: modules clean

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内核已经用make ARCH=arm CROSS_COMPILE=arm-hisiv200-linux- uImage编译成功了
编译hello模块的时候，执行make，错误如下：

1. [root@KenCentOS hello]# make
   
2. make -C /root/hisi/Hi3531_SDK_V1.0.B.0/osdrv/kernel/linux-3.0.y M=/root/hisi/MyDriver/hello  modules
   
3. make[1]: Entering directory `/root/hisi/Hi3531_SDK_V1.0.B.0/osdrv/kernel/linux-3.0.y'
   
4.   CC [M]  /root/hisi/MyDriver/hello/hello.o
   
5. cc1: error: unrecognized command line option "-m64"
   
6. cc1: error: unrecognized command line option "-mno-red-zone"
   
7. cc1: error: unrecognized command line option "-mcmodel=kernel"
   
8. cc1: error: unrecognized command line option "-maccumulate-outgoing-args"
   
9. cc1: error: unrecognized command line option "-mno-sse"
   
10. cc1: error: unrecognized command line option "-mno-mmx"
    
11. cc1: error: unrecognized command line option "-mno-sse2"
    
12. cc1: error: unrecognized command line option "-mno-3dnow"
    
13. cc1: warning: unrecognized command line option "-Wno-unused-but-set-variable"
    
14. make[2]: *** [/root/hisi/MyDriver/hello/hello.o] 错误 1
    
15. make[1]: *** [_module_/root/hisi/MyDriver/hello] 错误 2
    
16. make[1]: Leaving directory `/root/hisi/Hi3531_SDK_V1.0.B.0/osdrv/kernel/linux-3.0.y'
    
17. make: *** [modules] 错误 2
    

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但是Makefile里面改成make ARCH=arm CROSS_COMPILE=arm-hisiv200-linux- -C $(KERNEL_DIR) M=$(PWD) modules就能编译成功
为什么前面定义的ARCH=arm 和 CROSS_COMPILE=arm-hisiv200-linux- 不起作用，要在make语句定义才有用呢？

jeppeter

回复 1# KenZhang1031

你修改

1. PWD         := $(shell pwd)
   
2. KERNEL_DIR   = /root/hisi/Hi3531_SDK_V1.0.B.0/osdrv/kernel/linux-3.0.y
   
3. MODULE_NAME  = hello
   
4. ARCH = arm
   
5. CROSS_COMPILE = arm-hisiv200-linux-
   
6. CC    = $(CROSS_COMPILE)gcc
   
7. obj-m       := $(MODULE_NAME).o  
   
8. 
   
9. export ARCH CROSS_COMPILE
   
10. modules:
    
11.         make -C $(KERNEL_DIR) M=$(PWD) modules
    
12. clean:
    
13.         rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions
    
14. 
    
15. .PHONY: modules clean

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这样就可以了。
加了

1. export ARCH CROSS_COMPILE

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