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I am a new to kernel and drivers and I want to build char device.
I need to compile the source code against kernel headers similar to /lib/modules/2.6.27-11-generic/build on a PC.
The problem I cant find such directory in the kernel provided on the CD to include it in the makefile

Is there any solution?

Thanks

Hi, there is include directory under kernel-2.6.13

Thank you so much.
But I think my problem is that I need to extract the kernel in the correct location so that in .c files when I write #include<linux/init.h> the compiler would be able to locate it.

Can you please give me the Linux commands and steps to extract the kernel in a suitable directory?

Thanks

OK I have included the kernel path in my $PATH env. var.

Now I get this error:
include/linux/types.h:18: error: parse error before "__kernel_dev_t"
include/linux/types.h:18: warning: type defaults to `int' in declaration of `__kernel_dev_t'
include/linux/types.h:18: warning: data definition has no type or storage class
include/linux/types.h:21: error: parse error before "dev_t"
include/linux/types.h:21: warning: type defaults to `int' in declaration of `dev_t'
include/linux/types.h:21: warning: data definition has no type or storage class
include/linux/types.h:22: error: parse error before "ino_t"
include/linux/types.h:22: warning: type defaults to `int' in declaration of `ino_t'
include/linux/types.h:22: warning: data definition has no type or storage class
include/linux/types.h:23: error: parse error before "mode_t"
include/linux/types.h:23: warning: type defaults to `int' in declaration of `mode_t'
include/linux/types.h:23: warning: data definition has no type or storage class
include/linux/types.h:24: error: parse error before "nlink_t"
include/linux/types.h:24: warning: type defaults to `int' in declaration of `nlink_t'
include/linux/types.h:24: warning: data definition has no type or storage class
include/linux/types.h:25: error: parse error before "off_t"
include/linux/types.h:25: warning: type defaults to `int' in declaration of `off_t'
include/linux/types.h:25: warning: data definition has no type or storage class
include/linux/types.h:26: error: parse error before "pid_t"
include/linux/types.h:26: warning: type defaults to `int' in declaration of `pid_t'
include/linux/types.h:26: warning: data definition has no type or storage class
include/linux/types.h:27: error: parse error before "daddr_t"
include/linux/types.h:27: warning: type defaults to `int' in declaration of `daddr_t'
include/linux/types.h:27: warning: data definition has no type or storage class
include/linux/types.h:29: error: parse error before "suseconds_t"

What dose this mean?

Did you successfully build linux kernel in your cross development envoirnment?

I did not try try to build the kernel. I am only trying to build modules.

I suspect there is problem in kernel headers. How do I install the latest kernel version?

If I have to compile the kernel before compiling kernel modules what is the commands for doing that?
also where is the default configuration

Here you go-->
viewtopic.php?f=6&t=26

Ok I have followed the instructions in the link and the kernel is compiled correctly.

I still get the same errors:
make -C /opt/FriendlyARM/mini2440/kernel-2.6.13 SUBDIRS=/home/tarek/workspace/hellomod modules
make[1]: Entering directory `/opt/FriendlyARM/mini2440/kernel-2.6.13'

WARNING: Symbol version dump /opt/FriendlyARM/mini2440/kernel-2.6.13/Module.symvers
is missing; modules will have no dependencies and modversions.

CC [M] /home/tarek/workspace/hellomod/hello.o
In file included from /home/tarek/workspace/hellomod/hello.c:6:
include/linux/kernel.h:104: error: parse error before "size_t"
include/linux/kernel.h:105: warning: function declaration isn't a prototype
include/linux/kernel.h:106: error: parse error before "size_t"
include/linux/kernel.h:107: warning: function declaration isn't a prototype
include/linux/kernel.h:108: error: parse error before "size_t"
include/linux/kernel.h:109: warning: function declaration isn't a prototype
include/linux/kernel.h:110: error: parse error before "size_t"
include/linux/kernel.h:111: warning: function declaration isn't a prototype
In file included from include/linux/timex.h:58,
from include/linux/sched.h:11,
from include/linux/module.h:10,
from /home/tarek/workspace/hellomod/hello.c:7:
include/linux/time.h:13: error: parse error before "time_t"


Is it possible that I need to update the kernel?

How to do that?

Thanks

Could you tell me what is your cross development envoirnment?

Here are steps to install gcc compliers for arm linux
viewtopic.php?f=6&t=66