Re: Error building 'Hello,World' kernel Module

[suneesh <suneesh@xxxxxxxxxxxxxx>]

Hi

Create a makefile like this :

KERNELDIR = /usr/src/linux-2.4  (change this according to your Kernel dir)

include $(KERNELDIR)/.config

CFLAGS = -I$(KERNELDIR)/include -O -Wall

all: hello.o

and try 'make' ....U can refer Rubini's Linux Device Drivers, chapter2

http://www.xml.com/ldd/chapter/book/ch02.html

Regards

Suneesh


Lei Yang wrote:

> 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
>
>
>
> --
> Kernelnewbies: Help each other learn about the Linux kernel.
> Archive:       http://mail.nl.linux.org/kernelnewbies/
> FAQ:           http://kernelnewbies.org/faq/
>
>
>
>  





--
Kernelnewbies: Help each other learn about the Linux kernel.
Archive:       http://mail.nl.linux.org/kernelnewbies/
FAQ:           http://kernelnewbies.org/faq/