Hi, I'm student and I don't have experience in embedded systems. I'm working with a
M-501 SoM board with ARM-Linux version 2.6.14-M5. I would like to compile this kernel's
module example code for my board. The kernel's module example code is:

===============================================================================
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <asm/current.h>
#include <linux/sched.h>

static int hola(void)
{
printk(KERN_INFO "Hi! the module had been load\n");
printk(KERN_INFO "The user space process is %s\n", current->comm);
printk(KERN_INFO "The PID is %i \n", current->pid);
return 0;
}

static void adios(void)
{
printk(KERN_INFO "Bye, the module kernel has been unload.\n");
}
module_init(hola);
module_exit(adios);
MODULE_AUTHOR("author's name");
MODULE_LICENSE("Licence's type");
MODULE_DESCRIPTION("Module Description");
===============================================================================

I used this makefile:

===============================================================================
ifeq ($(KERNELRELEASE),)
KERNELDIR ?= /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)
.PHONY: build clean

build:
$(MAKE) -C $(KERNELDIR) M=$(PWD) modules #$(CC)
clean:
rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c Mod* mod*
else
$(It is created with = ${KERNELRELEASE})
obj-m := hola.o

endif
===============================================================================

When I used this makefile, I can create and load in my Linux's PC the "hola.ok" file
without problems.

I downloaded the ARM-linux kernel's code from this site:
ftp://ftp.artila.com/Matrix5xx/Sources/kernel/m501_som/

I modified the makefile file for adapted it to ARM-Linux.
===============================================================================
ifeq ($(KERNELRELEASE),)
KERNELDIR ?=/home/jyrios/Documentos/Kernels-arm-linux/linux-2.6.x # (path to ARM-linux kernel's code in my PC)
PWD :=$(shell pwd)
.PHONY: build clean

build:
$(MAKE) -C $(KERNELDIR) ARCH=arm CROSS_COMPILE=arm-linux- STRIP=arm-linux-strip -W -Wall M=$(PWD) modules #$(CC)
clean:
rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c Mod* mod*
else

$(It is created with = ${KERNELRELEASE})
obj-m := hola.o
endif
===============================================================================

But, When I try to compile for the ARM-Linux, I got 2 errors compilation:

1. "the Module.symvers file is missing". What's the function for this file?
I looking for the "Module.symvers" file in /home/jyrios/Documentos/Kernels-arm-linux/linux-2.6.x
path and I don't find it!

2. Thousands and thousands of errors and warnings like:
a) include/linux/elf.h:19: warning: type defaults to `int' in declaration of `Elf32_Sword'
b) include/linux/elf.h:19: warning: data definition has no type or storage class
c) include/linux/elf.h:20: error: parse error before "Elf32_Word"


What is it I made wrong? I would appreciate a tutorial or a link to teach me about this.

Thanks!

P.D. I'm sorry for my english!!

A classmate said to me that my problem is not the "Module.symvers" file, my real problem is that i don't have the config file, and I don't have compile the linux kernel.

In this site explain how to compile the kernel linux for ARM plataform.:
http://www.arm.linux.org.uk/docs/kerncomp.php

I don't do it yet.... and I don't know if this working.... but I will try and write wherever if I could solve it or not.

I'm reading some pages... and I see that my arm-linux toolchain is very old... I'll try to update and I'll try to compile again...