小编Ras*_*sen的帖子

我有源代码:

#include <linux/module.h>   
#include <linux/kernel.h>   

int init_module(void)
{
    printk(KERN_INFO "Hello world %i\n", BUILD_NUMBER);
    return 0;
}

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

和一个makefile:

obj-m += hello-1.o

BUILD_NUMBER := 42

# How to pass BUILD_NUMBER to hello-1.c ???

all:
    make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

clean:
    make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

现在如何将BUILD_NUMBER参数从makefile传递给源代码？