(.text+0x57): undefined reference to `pthread_create'求解
废话不多说，程序如下：
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>

void *myThread( void *arg )
{
  pthread_t pt;

  pt = pthread_self();

  printf("Thread %x ran!\n", (int)pt );

  pthread_exit( NULL );
}
int main()
{
  int ret;
  pthread_t mythread;

  ret = pthread_create( &mythread, NULL, myThread, NULL );

  if (ret != 0) {
  printf( "Can't create pthread (%s)\n", strerror( errno ) );
  exit(-1);
  }

  return 0;
}
编译：
gcc ptcreate.c -o create
/tmp/cc1UwArn.o: In function `main':
ptcreate.c:(.text+0x57): undefined reference to `pthread_create'
collect2: ld returned 1 exit status
请问各问问题出在哪里，该如何解决，谢谢～～～


------解决方案--------------------
gcc ptcreate.c -o create -lpthread