Re: Problem with module compilation

["Amit D Chaudhary" <amit@muppetlabs.com>]

Hi,

I think you have Redhat 7.0, try using kgcc instead of gcc

Amit

----- Original Message -----
From: Tiziano Fagni
To: kernelnewbies@nl.linux.org
Sent: Thursday, February 15, 2001 2:33 AM
Subject: Problem with module compilation


Hi, I am a new kernel hacker and I am trying to write my first character
device
driver. I want to develop the driver as module so I get "Linux Kernel Module
Programming Guide" and I begin writing....
After I have writed the basic code such as init_module() and
cleanup_module()
I have tryed to compile the module but I obtain an infinite number of
errors.
The errors are relative to the standard include files.
This is the output of my compiler (the first lines):

gcc -D__KERNEL__ -D__SMP__ -Wall -DMODULE -DMODVERSIONS -c -o idx_module.o
idx_module.c
In file included from /usr/include/linux/dcache.h:7,
from /usr/include/linux/fs.h:19,
from idx_module.c:7:
/usr/include/linux/mount.h:32: parse error before `uid_t'
/usr/include/linux/mount.h:32: warning: no semicolon at end of struct or
union
/usr/include/linux/mount.h: In function `mntget':
/usr/include/linux/mount.h:38: dereferencing pointer to incomplete type
/usr/include/linux/mount.h: In function `mntput':
/usr/include/linux/mount.h:45: dereferencing pointer to incomplete type
/usr/include/linux/mount.h:46: warning: implicit declaration of function
`printk_Rsmp_1b7d4074'
In file included from /usr/include/linux/string.h:21,
from /usr/include/linux/fs.h:23,
from idx_module.c:7:
/usr/include/asm/string.h: At top level:
/usr/include/asm/string.h:47: parse error before `size_t'
/usr/include/asm/string.h: In function `strncpy':
/usr/include/asm/string.h:61: `src' undeclared (first use in this function)
/usr/include/asm/string.h:61: (Each undeclared identifier is reported only
once
/usr/include/asm/string.h:61: for each function it appears in.)
/usr/include/asm/string.h:61: `dest' undeclared (first use in this function)
/usr/include/asm/string.h:61: `count' undeclared (first use in this
function)
/usr/include/asm/string.h:63: warning: control reaches end of non-void
function



My module source file is this:



#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/modversions.h>

/* For character devices. */
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/wrapper.h>
#include <asm/uaccess.h>



/* Initialize the module - Register the character device */
int init_module()
{
    /* Register the character device. */
    Major = module_register_chrdev(0, DEVICE_NAME, &Fops);
    if (Major < 0)
   {
       printk("Register device failed\n");
       return Major;
   }
   printk("Device register with major <%d>!!\n", Major);
   return 0;
}


/* Cleanup function. */
void cleanup_module()
{
   int ret;
   /* Unregister the device. */
   ret = module_unregister_chrdev(Major, DEVICE_NAME);
   if (ret < 0)
       printk("Error <%d> when try to unloading module!!\n", ret);
}






I try to compile the module on a system running kernel 2.4.0 in SMP mode.
Anyone can help me to solve this problem?
Thanks Tiziano Fagni

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