c - 使用 pthread.h 发布编译程序

Question

我正在尝试在 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我收到错误消息“未知类型名称‘pthread’。现在我环顾四周，发现我必须包括 -lpthread:gcc -o runner runner.c -lpthread但是它会产生完全相同的错误。

我运行了以下命令:whereis pthread 并返回了文件位置，因此我知道我有该文件。

Answer 1

您缺少一些下划线。 pthread t应该是pthread_t，pthread_attr_t应该是pthread_attr_t等