linux kernel 测试文件编译失败
学习《Linux设备驱动程序第三版.pdf》,第2章的给的测试程序,无法再虚拟机上编译成功。主要原因是makefile不正确,请帮忙修改一下。
错误提示信息:
make[1]: Entering directory `/usr/src/kernels/2.6.29.4-167.fc11.i686.PAE’
make[2]: *** No rule to make target `/mnt/hgfs/share/kernel_code/kernel_hello.c’, needed by `/mnt/hgfs/share/kernel_code/kernel_hello.o’. Stop.
make[1]: *** [_module_/mnt/hgfs/share/kernel_code] Error 2
make[1]: Leaving directory `/usr/src/kernels/2.6.29.4-167.fc11.i686.PAE’
make: *** [default] Error 2
书中的makefile脚本(没有指定编译器,我不清楚应该指定那个编译器)
- Python code
# If KERNELRELEASE is defined, we've been invoked from the # kernel build system and can use its language. ifneq ($(KERNELRELEASE),) obj-m := kernel_hello.o # Otherwise we were called directly from the command # line; invoke the kernel build system. else KERNELDIR ?= /lib/modules/$(shell uname -r)/build #ehco $(KERNELDIR) PWD := $(shell pwd) #echo $(PWD) default: $(MAKE) -C $(KERNELDIR) M=$(PWD) modules
源代码:
- C/C++ code
#include <linux/init.h> #include <linux/module.h> MODULE_LICENSE("Dual BSD/GPL"); static int hello_init(void) { printk(KERN_ALERT "Hello, world\n"); return 0; } static void hello_exit(void) { printk(KERN_ALERT "Goodbye, cruel world\n"); } module_init(hello_init); module_exit(hello_exit);
请问应该如何修改makefile
对于第一个问题:当你使用伪终端执行的时候是看不到打印的字符的,如果你切换到真正的字符界面(终端)在insmod,就能够看到打印的消息了;
第二个问题没有接触过