hp11i 创建线程失败，请帮忙检查

kkkkkkkk

编译没有报错，但运行报错：created err code:251. 根据HP的错误解释251是
errno.h:#define ENOSYS          251     /* Function not implemented     */
程序代码是这样的：
#include <stdio.h>;
#include <string.h>;
#include <pthread.h>;

/* Th1 is a thread. */
void *Th1(void *arg)
{
  printf(\"ok.\\n\";
  return((void *)arg);
}
/* Main is a main program that creates the thread Th1. */
int main()
{
    pthread_t threadApp;
    char  *sd;
    pthread_attr_t attr;
    sd=NULL;       
   
    int ret=0;
   
    ret=pthread_create(&amp;threadApp,NULL,(Th1),(void *)1);
   
    if(ret!=0)
    {
        fprintf(stderr,\"created err code:%d.\\n\",ret);
        return 1;
    }
    printf(\"App thread created\\n\";
   
    if (pthread_join(threadApp,NULL) == 0)
    {
        printf(\"pthread fileprocess stop\\n\";
    }
    else
    {
        fprintf(stderr,\"pthread_join error\";
        return 1;
    }
    return 1;
}

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