怎么样将多个源程序编译成一个驱动?

Question

1.obj-m:= smart_card.o 定义为新名smart_card.o , 说找不到smart_card
#ifneq ($(KERNELRELEASE),)
        obj-m:= smart_card.o
        module-objs := ncn6001.o smart_driver.o
#else
        KDIR = /opt/kernel/utu-linux_for_s3c2440_dm9000_V1.5.8
        PWD:=$(shell pwd)
default:
        $(MAKE) -C $(KDIR) M=$(PWD) modules
clean:
        rm -rf *.o *.ko
#endif       

2.定义为两个文件中的一个 , 又不编译连接ncn6001文件 ,说引用那未定义的名称(就是在ncn6001定义的函数 ,在头文件中已经声明那呀)
#ifneq ($(KERNELRELEASE),)
        obj-m:= smart_driver.o
        module-objs := ncn6001.o smart_driver.o
#else
        KDIR = /opt/kernel/utu-linux_for_s3c2440_dm9000_V1.5.8
        PWD:=$(shell pwd)
default:
        $(MAKE) -C $(KDIR) M=$(PWD) modules
clean:
        rm -rf *.o *.ko
#endif       

大侠帮忙

Answer 1

编译现象 :
[root@localhost drv]# make
make -C /opt/kernel/utu-linux_for_s3c2440_dm9000_V1.5.8 M=/usr/xp_nfs/smart_driver/drv modules
make[1]: Entering directory `/opt/kernel/utu-linux_for_s3c2440_dm9000_V1.5.8'
  CC [M]  /usr/xp_nfs/smart_driver/drv/smart_driver.o
/usr/xp_nfs/smart_driver/drv/smart_driver.c: In function `T1_Receiv_Send':
/usr/xp_nfs/smart_driver/drv/smart_driver.c:1081: warning: 'ret' might be used uninitialized in this function
  Building modules, stage 2.
  MODPOST
*** Warning: "Spi_release" [/usr/xp_nfs/smart_driver/drv/smart_driver.ko] undefined!
*** Warning: "Smart_ColdRst" [/usr/xp_nfs/smart_driver/drv/smart_driver.ko] undefined!
*** Warning: "Ncn6001_Init" [/usr/xp_nfs/smart_driver/drv/smart_driver.ko] undefined!
*** Warning: "ncn6001_dat_init" [/usr/xp_nfs/smart_driver/drv/smart_driver.ko] undefined!
*** Warning: "Spi_Init" [/usr/xp_nfs/smart_driver/drv/smart_driver.ko] undefined!
  CC      /usr/xp_nfs/smart_driver/drv/smart_driver.mod.o
  LD [M]  /usr/xp_nfs/smart_driver/drv/smart_driver.ko
make[1]: Leaving directory `/opt/kernel/utu-linux_for_s3c2440_dm9000_V1.5.8'
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加载现象:
[root@utu-linux drv]# insmod smart_driver.ko
Using smart_driver.ko
smart_driver: Unknown symbol Spi_Init
smart_driver: Unknown symbol Ncn6001_Init
smart_driver: Unknown symbol ncn6001_dat_init
smart_driver: Unknown symbol Spi_release
smart_driver: Unknown symbol Smart_ColdRst

这样看来ncn6001根本就没加载和连接进来呀 ?? 原因何在??

Answer 2

你看看LDD3就知道了，上面写得挺详细的。

Answer 3

从你这个现象来看，主要是这些symbol在内核符号表里面没有找到。
有几种可能：
1、头文件没有包含进去或者是函数没有实现；
2、你需要的其他模块导出的函数，但这个模块没有加载进内核。