On Wed, 29 Jul 2009, Siddu wrote:
> On Wed, Jul 29, 2009 at 7:31 PM, Mulyadi Santosa <mulyadi.santosa@xxxxxxxxx>
> wrote:
> On Wed, Jul 29, 2009 at 8:55 PM, Gergely Buday<gbuday@xxxxxxxxx>
> wrote:
> > Dear kernel experts,
> >
> > I try to compile a module from Linux Device Drivers, 3rd
> edition:
> >
> > ---
> > #include <linux/init.h>
> > #include <linux/module.h>
> > MODULE_LICENSE("Dual BSD/GPL");
> >
> > static int hello_init(void)
> > {
> > printk(KERN_ALERT "Hello, world\n");
> > return 0;
> > }
> >
> > static void hello_exit(void)
> > {
> > printk(KERN_ALERT "Goodbye, cruel world\n");
> > }
> >
> > module_init(hello_init);
> > module_exit(hello_exit);
> > ---
> >
> > I got a makefile from
> >
> > http://www.tldp.org/LDP/lkmpg/2.6/html/x181.html
> >
> > namely
> >
> > obj-m += helloworld.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
> >
> > but that does not work on my system. What makefile should I
> use and
> > where should I put my helloworld.c?
>
>
> what error messages did you see?
>
> Please read all the articles by robert meant for newbie here . That should
> be able to answer your question
> http://linux.com/search/kernel%2Bnewbie%2Bcorner/%252F?ordering=oldest&sear
> chphrase=exact&limit=20
thanks, i appreciate the recommendation. from a quick glance, it
looks like the original poster hasn't installed the kernel-headers
package on his system.
an easy way to tell is to check the current kernel version with:
$ uname -r
then make sure that, under the directory /lib/modules/<version>,
there is a symbolic link called "build" which takes you to the actual
kernel headers directory. if that symlink isn't there, i don't think
you've installed the kernel headers, and that would definitely explain
your problems.
rday
--
========================================================================
Robert P. J. Day Waterloo, Ontario, CANADA
Linux Consulting, Training and Annoying Kernel Pedantry.
Web page: http://crashcourse.ca
Twitter: http://twitter.com/rpjday
"Kernel Newbie Corner" column @ linux.com: http://cli.gs/WG6WYX
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