Hi all. I am trying to learn writing linux modules. I am referring to a book
for writing the modules in C.
my code is :
/*hello-1.c*/
#include <linux/module.h> /* Needed by all modules */
#include <linux/kernel.h> /* Needed for KERN_ALERT */
int init_module(void){
printk("<1>Hello world 1.\n");
/* A non 0 return means init_module failed; module can't be loaded. */
return 0;
}
void cleanup_module(void){
printk("<1>Goodbye world 1.\n");
}
when I comile this using :
$ gcc -c hello-1.c
It says :
hello-1.c:4:55: error: linux/module.h: No such file or directory
hello-1.c: In function ‘cleanup_module’:
hello-1.c:19: error: ‘KERN_ALERT’ undeclared (first use in this function)
hello-1.c:19: error: (Each undeclared identifier is reported only once
hello-1.c:19: error: for each function it appears in.)
hello-1.c:19: error: expected ‘)’ before string constant
how do i solve this?
Thank you.
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