a "hello world" module sample in ldd3:
////////////////////////////////////////////////
#include <linux/init.h>
#include <linux/module.h>
MODULE_LICENSE("Dual BSD/GPL");

static int hello_init(void)
{
printk(KERN_ALERT "Hello, World!\n");
return 0;
}

static void hello_exit(void)
{
printk(KERN_ALERT "Goodbye, cruel world!\n");
}
module_init(hello_init);
module_exit(hello_exit);
//////////////////////////////////////////
i compiled it with gcc:
//////////////////////////////////////////
$gcc -c -I/usr/src/linux/include hello.c
//////////////////////////////////////////
but it generated a ton of such error:
////////////////////////////////////////////
/usr/src/linux/include/linux/time.h:13: error: syntax error before 'time_t'
/usr/src/linux/include/linux/time.h:13: warning: no semicolon at end of stru
ct or union
/usr/src/linux/include/linux/time.h:15: error: syntax error before '}' token
/usr/src/linux/include/linux/time.h:19: error: syntax error before 'time_t'
/usr/src/linux/include/linux/time.h:19: warning: no semicolon at end of stru
ct or union
/usr/src/linux/include/linux/time.h:20: warning: data definition has no type
 or
storage class
/usr/src/linux/include/linux/time.h:136: error: field 'it_interval' has inco
mplete type
/usr/src/linux/include/linux/time.h:137: error: field 'it_value' has incompl
ete
type
/usr/src/linux/include/linux/time.h:141: error: field 'it_interval' has inco
mplete type
/usr/src/linux/include/linux/time.h:142: error: field 'it_value' has incompl
ete
type
In file included from /usr/src/linux/include/linux/sched.h:11,
//////////////////////////////////////////
who can tell me why?? thanks a lot!!!

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zz wrote:
> a "hello world" module sample in ldd3:
> ////////////////////////////////////////////////
> #include <linux/init.h>
> #include <linux/module.h>
> MODULE_LICENSE("Dual BSD/GPL");
>
> static int hello_init(void)
> {
>         printk(KERN_ALERT "Hello, World!\n");
>         return 0;
> }
>
> static void hello_exit(void)
> {
>         printk(KERN_ALERT "Goodbye, cruel world!\n");
> }
> module_init(hello_init);
> module_exit(hello_exit);
> //////////////////////////////////////////
> i compiled it with gcc:
> //////////////////////////////////////////
> $gcc -c -I/usr/src/linux/include hello.c
> //////////////////////////////////////////
> but it generated a ton of such error:
> ////////////////////////////////////////////
> /usr/src/linux/include/linux/time.h:13: error: syntax error before 'time_t
'
> /usr/src/linux/include/linux/time.h:13: warning: no semicolon at end of st
ruct or union
> /usr/src/linux/include/linux/time.h:15: error: syntax error before '}' tok
en
> /usr/src/linux/include/linux/time.h:19: error: syntax error before 'time_t
'
> /usr/src/linux/include/linux/time.h:19: warning: no semicolon at end of st
ruct or union
> /usr/src/linux/include/linux/time.h:20: warning: data definition has no ty
pe or
> storage class
> /usr/src/linux/include/linux/time.h:136: error: field 'it_interval' has in
complete type
> /usr/src/linux/include/linux/time.h:137: error: field 'it_value' has incom
plete
> type
> /usr/src/linux/include/linux/time.h:141: error: field 'it_interval' has in
complete type
> /usr/src/linux/include/linux/time.h:142: error: field 'it_value' has incom
plete
> type
> In file included from /usr/src/linux/include/linux/sched.h:11,
> //////////////////////////////////////////
> who can tell me why?? thanks a lot!!!
>

You apparently have indirectly included <linux/time.h> without including
a prerequisite file that defines something needed by this header file.

--

Fletcher Glenn

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