请教关于pthread的程序编译通不过，谢谢__pthread_create_void_reference_undefined_ccMKonTr_

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请教关于pthread的程序编译通不过，谢谢

来源: 互联网发布时间：2015-12-21

本文导语: 编译信息如下： [root@andy process]# gcc thrdcancel.c -o thrdcancel /tmp/ccMKonTr.o(.text+0x21): In function `main': : undefined reference to `pthread_create' /tmp/ccMKonTr.o(.text+0x5c): In function `main': : undefined reference to `pthread_create' /tmp/ccMK...

编译信息如下：

[root@andy process]# gcc thrdcancel.c -o thrdcancel
/tmp/ccMKonTr.o(.text+0x21): In function `main':
: undefined reference to `pthread_create'
/tmp/ccMKonTr.o(.text+0x5c): In function `main':
: undefined reference to `pthread_create'
/tmp/ccMKonTr.o(.text+0x8f): In function `main':
: undefined reference to `pthread_join'
/tmp/ccMKonTr.o(.text+0x9d): In function `main':
: undefined reference to `pthread_cancel'
/tmp/ccMKonTr.o(.text+0xad): In function `main':
: undefined reference to `pthread_join'
collect2: ld returned 1 exit status

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源程序代码如下：
/*
* thrdcreat.c - Illustrate creating a thread
*/

#include
#include
#include

void task1(int * counter);
void task2(int * counter);
void cleanup(int counter1, int counter2);

int g1 = 0;
int g2 = 0;

int main(void)
{
pthread_t thrd1, thrd2;
int ret;
/*create the first thread*/
ret = pthread_create(&thrd1,NULL,(void *)task1,(void *)&g1);
if(ret)
{
perror("pthread_create:task1");
exit(EXIT_FAILURE);
}
/*create the second thread*/
ret = pthread_create(&thrd2, NULL, (void *)task2, (void *)&g2);
if(ret)
{
perror("pthread_create:task2");
exit(EXIT_FAILURE);
}

pthread_join(thrd2,NULL);
pthread_join(thrd1,NULL);

cleanup(g1,g2);
exit(EXIT_SUCCESS);
}

void task1(int *counter)
{
while(*counter