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创建内核模块

tag-icon • tag-icon linux-kernel make c
创建内核模块

我目前正在阅读一本关于 Linux 内核模块编程的书 -https://tldp.org/LDP/lkmpg/2.4/lkmpg.pdf我在运行 make 时遇到编译错误。

/*  hello.c − The simplest kernel module.
 *
 */
/* Kernel Programming */

#define MODULE
#define LINUX
#define __KERNEL__

#include <linux/module.h>  /* Needed by all modules */
#include <linux/kernel.h>  /* Needed for KERN_ALERT */

int init_module(void)
{
   printk("<1>Hello world 1.\n");
   // A non 0 return means init_module failed; module can't be loaded.
   return 0;
}

void cleanup_module(void)
{
  printk(KERN_ALERT "Goodbye world 1.\n");
}

MODULE_LICENSE("GPL");

TARGET  := hello
WARN    := −W −Wall −Wstrict−prototypes −Wmissing−prototypes
INCLUDE := −isystem /lib/modules/`uname −r` /build/include
CFLAGS  := −O2 −DMODULE −D__KERNEL__ ${WARN} ${INCLUDE}
CC      := gcc

${TARGET}.o: ${TARGET}.c

.PHONY: clean

clean: rm −rf ${TARGET}.o

gcc −O2 −DMODULE −D__KERNEL__ −W −Wall −Wstrict−prototypes −Wmissing−prototypes −isystem /lib/modules/`uname −r` /build/include   -c -o hello.o hello.c
uname: extra operand ‘−r’
Try 'uname --help' for more information.
gcc: error: −O2: No such file or directory
gcc: error: −DMODULE: No such file or directory
gcc: error: −D__KERNEL__: No such file or directory
gcc: error: −W: No such file or directory
gcc: error: −Wall: No such file or directory
gcc: error: −Wstrict−prototypes: No such file or directory
gcc: error: −Wmissing−prototypes: No such file or directory
gcc: error: −isystem: No such file or directory
gcc: error: /build/include: No such file or directory
make: *** [<builtin>: hello.o] Error 1

我收到的错误是 Makefile 中定义的命令选项。我不明白什么？

答案1

您需要使用连字符，-而不是短破折号，−。

您还需要删除多余的空间

INCLUDE := -isystem /lib/modules/`uname -r`/build/include

（就在之前/build/include）。

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