编译LDD3的scull驱动问题解决实例

由于Linux内核版本更新的原因，LDD3（v2.6.10）提供的源码无法直接使用，下面是本人
 编译scull源码时出现的一些问题及解决方法。
 编译环境：CentOS 6.3（kernel version 2.6.32）
 
编译错误：
 make -C /lib/modules/2.6.32-279.14.1.el6.i686/build M=/mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull LDDINC=/mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/../include modules
 make[1]: Entering directory `/usr/src/kernels/2.6.32-279.14.1.el6.i686'
 scripts/Makefile.build:49: *** CFLAGS was changed in "/mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/Makefile". Fix it to use EXTRA_CFLAGS.  Stop.
 make[1]: *** [_module_/mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull] Error 2
 make[1]: Leaving directory `/usr/src/kernels/2.6.32-279.14.1.el6.i686'
 make: *** [modules] Error 2
 解决方案：
 CFLAGS与Makefile.build中的CFLAGS冲突，错误提示要求将CFLAG换成EXTRA_CFLAGS重新编译即可；
 

编译错误：
 error: linux/config.h: No such file or directory
 解决方案：
 从linux-2.6.20起，config.h就已经被移除了.
 将#include <linux/config.h>修改成如下——>
 #include <linux/version.h>
 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
 #include <linux/config.h>
 #endif
 
编译错误：
 /mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.c: In function ‘scull_p_read’:
 /mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.c:131: error: ‘TASK_INTERRUPTIBLE’ undeclared (first use in this function)
 /mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.c:131: error: (Each undeclared identifier is reported only once
 /mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.c:131: error: for each function it appears in.)
 /mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.c:131: error: implicit declaration of function ‘signal_pending’
 /mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.c:131: error: implicit declaration of function ‘schedule’
 /mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.c: In function ‘scull_getwritespace’:
 /mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.c:168: error: ‘TASK_INTERRUPTIBLE’ undeclared (first use in this function)
 /mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.c: In function ‘scull_p_write’:
 /mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.c:219: error: ‘TASK_INTERRUPTIBLE’ undeclared (first use in this function)
 /mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.c:223: error: ‘SIGIO’ undeclared (first use in this function)
 /mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.c:223: error: ‘POLL_IN’ undeclared (first use in this function)
 make[2]: *** [/mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull/pipe.o] Error 1
 make[1]: *** [_module_/mnt/HappyStudy/MyDesigner/Linux/LDD3/examples/scull] Error 2
 解决方案：
 头文件变动原因，在pipe.c中添加
 #include <include/sched.h>