From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lei Yang <leiyang@nec-labs.com>
Subject: Error building 'Hello,World' kernel Module
Date: Wed, 04 Aug 2004 15:43:40 -0700
Sender: linux-newbie-owner@vger.kernel.org
Message-ID: <1091659420.5427.14.camel@bijar.nec-labs.com>
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To: kernelnewbies <kernelnewbies@nl.linux.org>, linux-newbie@vger.kernel.org

Hello,

I am learning about module programming and just tried to build a
simplest module, Hello World.

The code is as follows:
/* hello.c
#include <linux/module.h>       
#include <linux/kernel.h>      

int init_module(void)
{
        printk("Hello world!\n");
        return 0;
}

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


The makefile is just one line:
 obj-m += hello.o

Then as root, I did in the HelloWorld directory:

make -C /usr/src/linux-`uname -r` SUBDIRS=$PWD modules

There is such an error:
make: Entering directory `/usr/src/linux-2.6.5-7.104-default'

WARNING: Symbol version dump
/usr/src/linux-2.6.5-7.104-default/Module.symvers is  missing, modules
will have CONFIG_MODVERSIONS disabled.

make[1]: *** No rule to make target `/home/lei/HelloWorld/hello.c',
needed by `/home/lei/HelloWorld/hello.o'.  Stop.
make: *** [_module_/home/lei/HelloWorld] Error 2
make: Leaving directory `/usr/src/linux-2.6.5-7.104-default'


Appreciate any comments and help!

TIA
Lei


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