c++11 thread --多线程编译报错问题解决办法

//test.cpp
#include <stdio.h>
#include <iostream>

#include <thread>
#include <mutex>

std::mutex mMutex;

using namespace std;

static int count=0;
static int MAX=5000;
static int line=0;
static int line_count=5;

void thread1(){
    while(1){
        if(count <MAX ){
            mMutex.lock();
            if(count <MAX ){
                std::cout<<"A: "<<++count<<"    ";
                if(++line == line_count){
                    std::cout<<endl;
                    line = 0;
                }
            }else{
                break;
            }
            mMutex.unlock();
        }
    }
}

void thread2(){
    while(1){
        if(count <MAX ){
            mMutex.lock();
            if(count <MAX ){
                std::cout<<"B: "<<++count<<"    ";
                if(++line == line_count){
                    std::cout<<endl;
                    line = 0;
                }
            }else{
                break;
            }
            mMutex.unlock();
        }
    }
}

int main()
{
        std::thread mThread1(thread1);
        std::thread mThread2(thread2);
        mThread1.detach();
        mThread2.detach();

    while(1){
        int x;
        std::cin>>x;
        if(x==0){
            break;
        }
    }

    return 0;
}

在终端中执行：

 g++ -std=c++11   test.cpp  -pthread -o test.out

编译报错：

terminate called after throwing an instance of 'std::system_error'
  what():  Enable multithreading to use std::thread: Operation not permitted

在网上查阅资料测试加上-Wl,--no-as-needed 就能正常编译运行了，完整的执行指令为：
 g++ -std=c++11  -Wl,--no-as-needed  test.cpp  -pthread -o test.out