Hello,
Our group tried rt-linux recently, and can not get our C++ program works.
The problem is when we tried to insmod the object code, it gave all
rt function calls (rt_task_init, rt_task_wait, ...) as unresolved symbols.
The code is really simple, doing nothing except printk("Hello\n"). We add
-D__KERNEL__ and -D__RT__ options when using g++
Can anyone tell me what's wrong with it and how to fix it? Or g++ is
totally not usable for rt-linux?
Thanks.
Shige Wang
RTCL
EECS
UM
-----------------------------------
PS. Here are the code, our compile command and error message:
#define MODULE
#include <linux/types.h>
#include <linux/module.h>
#include <linux/rt_sched.h>
#include <linux/kernel.h>
#include <linux/version.h>
RT_TASK task[1];
void getMem(int task)
{
while (1) {
printk("Hello\n");
}
rt_task_wait();
}
}
int init_module(void)
{
printk("Start it...\n");
rt_task_init(&task[0], getMem, 1, 100000, 1);
rt_task_make_periodic(&task[0], rt_get_time(), \
(RTIME)(RT_TICKS_PER_SEC/10000 ));
return 0;
}
void cleanup_module(void)
{
rt_task_delete(&task[0]);
}
[ercrms33]#g++ -g -c memalloc.cpp -D__KERNEL__ -D__RT__
[ercrms33]#/sbin/insmod memalloc.o
memalloc.o: unresolved symbol rt_task_init__FP14rt_task_structPFi_viii
memalloc.o: unresolved symbol rt_task_wait__Fv
memalloc.o: unresolved symbol rt_get_time__Fv
memalloc.o: unresolved symbol rt_task_delete__FP14rt_task_struct
memalloc.o: unresolved symbol rt_task_make_periodic__FP14rt_task_structxx
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