我必须为研究项目编写一个简单的Linux内核模块，但我遇到了Makefile的问题。这就是我obj-m := main.o
all:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
现在的样子：
main.c我要编译的源文件名为make，当我在源代码目录中输入root@debian:~/test-module# make
make -C /lib/modules/4.9.0-4-amd64/build M=/root/test-module modules
make[1]: Entering directory '/lib/modules/4.9.0-4-amd64/build'
make[1]: *** No rule to make target 'modules'. Stop.
make[1]: Leaving directory '/lib/modules/4.9.0-4-amd64/build'
Makefile:6: recipe for target 'all' failed
make: *** [all] Error 2
时，我得到了这个输出：
/lib/modules/4.9.0-4-amd64/build正如输出已经暗示的那样，我正在使用内核4.9.0-4-amd64运行Debian 9。由于我是Makefiles的新手，我无法在文件中找到任何错误。有人可以向我解释我的错误在哪里吗？
更新：经过一番研究后，我发现ln -s /usr/src/linux-source-4.9 /lib/modules/4.9.0-4-amd64/build
必须包含内核源代码树。所以我做了
root@debian:~/test-module# make
make -C /lib/modules/4.9.0-4-amd64/build modules
make[1]: Entering directory '/usr/src/linux-source-4.9'
scripts/kconfig/conf --silentoldconfig Kconfig
***
*** Configuration file ".config" not found!
***
*** Please run some configurator (e.g. "make oldconfig" or
*** "make menuconfig" or "make xconfig").
***
scripts/kconfig/Makefile:37: recipe for target 'silentoldconfig' failed
make[3]: *** [silentoldconfig] Error 1
Makefile:548: recipe for target 'silentoldconfig' failed
make[2]: *** [silentoldconfig] Error 2
The present kernel configuration has modules disabled.
Type 'make config' and enable loadable module support.
Then build a kernel with module support enabled.
Makefile:1271: recipe for target 'modules' failed
make[1]: *** [modules] Error 1
make[1]: Leaving directory '/usr/src/linux-source-4.9'
Makefile:4: recipe for target 'all' failed
make: *** [all] Error 2
其中链接的目标目录包含完整的Linux内核源代码树。当我现在运行make时，我得到了这个输出：
make config看起来比上次好，但仍然无法奏效。我想我只需要在内核源代码树的某个目录中运行 class User{
public $name ;
public $age ;
public $height ;
public $weight ;
function __construct($name,$age,$height,$weight){
$this->age = $age;
$this->name = $name;
$this->height = $height;
$this->weight = $weight;
}
public function ispis(){
echo $this->age;
}
}
$question_array = [new User ("Ivan","22","174","68"), new
User("Luka","23","174","68") ];
$daniel = new User($question_array);
//$daniel = new User("ivan","22");
$daniel->ispis();
左右，但我不知道在哪里。我该怎么办？