使用pthread.h发布编译程序

Question

我试图在Linux(Ubuntu)机器上编译以下程序:

#include <pthread.h>
#include <stdio.h>
int sum; /* this data is shared by the thread(s) */
void *runner(void *param); /* threads call this function */
int main(int argc, char *argv[])
{
pthread t tid; /* the thread identifier */
pthread attr t attr; /* set of thread attributes */
if (argc != 2) {
fprintf(stderr,"usage: a.out <integer value>\n");
return -1;
}
if (atoi(argv[1]) < 0) {
fprintf(stderr,"%d must be >= 0\n",atoi(argv[1]));
return -1;
}
/* get the default attributes */
pthread attr init(&attr);
/* create the thread */
pthread create(&tid,&attr,runner,argv[1]);
/* wait for the thread to exit */
pthread join(tid,NULL);
printf("sum = %d\n",sum);
}
/* The thread will begin control in this function */
void *runner(void *param)
{
int i, upper = atoi(param);
sum = 0;
for (i = 1; i <= upper; i++)
sum += i;
pthread exit(0);
}

但是每当我尝试这样做时: gcc -o runner runner.c 我收到一个错误"未知的类型名称'pthread'.现在我一直在环顾四周,看看我必须包含-lpthread: gcc -o runner runner.c -lpthread 然而它产生了同样的错误.

我运行以下命令:whereis pthread并返回文件位置,所以我知道我有文件.

Answer 1

你错过了一些下划线. pthread t应该是pthread_t,pthread_attr_t应该是pthread_attr_t等等