error in compilation of first module

[euclid_1729]

am trying to learn kernel propgramming.......but am having some fundamentals wrong.

1) am having mandriva 2007.....is it necessary to first configure the kernel and build it before inserting modules in 2.6 kernel series.

2) am not having source in /usr/source so in which directory i should go and call make xconfig


3) i understand what configuring a kernel means but what is meant by building a kernel.



am trying to write a module but getting error in compilation

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

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


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





the make file for this program is::



obj-m:=hello1.o


all:
make -C /lib/modules/`uname -r`/kernel/fs M=$(PWD) modules

clean:
make -C /lib/modules/'uname -r'/kernel/fs M=$(PWD) clean



and the error encountered is::





[neferteti@localhost prog 1]$ make
make -C /lib/modules/`uname -r`/kernel/fs M=/home/neferteti/Documents/programs/kernel modules/prog 1 modules
make[1]: Entering directory `/lib/modules/2.6.17-5mdv/kernel/fs'
make[1]: *** No rule to make target `modules/prog'. Stop.
make[1]: Leaving directory `/lib/modules/2.6.17-5mdv/kernel/fs'
make: *** [all] Error 2

************************************************** *******

please help me out with these doubts. I will truly appreciate your help.

[raghaven.kumar]

dude,

do uname -r for finding your kernel version

find your kernel-devel installation for your kernel
and install it.

im not sure what mandriva is
but if its debian-based, i suggest using apt-get for installation.

[digvijay.gahlot]

obj-m += hello1.o
VERSION := $(shell uname -r)
PWD := $(shell pwd)
default:
$(MAKE) -C /lib/modules/$(VERSION)/build M=$(PWD) modules

May be you forgot += on the first line .