Re: Linux module compilation problem

[Vipul Jain <vipulsj@xxxxxxxxx>]

On Mon, May 18, 2009 at 3:37 PM, Robert P. J. Day <rpjday@xxxxxxxxxxxxxx> wrote:

On Mon, 18 May 2009, Vipul Jain wrote:

> I am using Ubuntu 9.0.4 and currently building out of the source
> tree, infact I am using the existing Ubuntu hearder files to build
> my sample driver. Do I really need to get the source tree for
> building modules?

 if you want to build modules out of tree, you will need at least
*part* of the kernel source tree, since you have to compile your
module against the kernel header files.  you can have the entire
source tree, or you might be able to get away with just the part of
the tree that includes the build infrastructure and header files.

Can you please tell me how to get this kind of setup? What changes should I make in my make file?

Regards,
Vipul.
 

some distros have pre-defined packages for that called something like
"kernel-devel".  in any event, you will need at least that part of the
kernel source tree.

> Secondly, I am not sure where to run make prepare_modules can you
> please specify the exact location.

 run that from the top of your kernel source tree -- that will prep
the tree just enough to allow modules to be built against it.

rday

p.s. it's "make modules_prepare", not "make prepare_modules".  i
guess i can make that wiki page clearer.

http://www.crashcourse.ca/wiki/index.php/Writing_your_first_kernel_module

--

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Robert P. J. Day                               Waterloo, Ontario, CANADA

       Linux Consulting, Training and Annoying Kernel Pedantry.

Web page:                                          http://crashcourse.ca
Linked In:                             http://www.linkedin.com/in/rpjday
Twitter:                                       http://twitter.com/rpjday
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