Enable multithreading to use std::thread: Operation not permitted问题解决

在用g++ 4.8.2编译C++11的线程代码后，运行时遇到了如下报错：

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

我们先看一下代码：

 1 #include <boost/atomic.hpp>
 2 #include <thread>
 3 #include <iostream>
 4 
 5 boost::atomic<int> a{0};
 6 
 7 void thread()
 8 {
 9   ++a;
10 }
11 
12 int main()
13 {
14   std::thread t1{thread};
15   std::thread t2{thread};
16   t1.join();
17   t2.join();
18   std::cout << a << '
';
19 }

之前用的编译命令为：

/opt/compiler/gcc-4.8.2/bin/g++ test.cpp -I ./boost/include -std=c++11

需要改为：

/opt/compiler/gcc-4.8.2/bin/g++ test.cpp -I ./boost/include -std=c++11 -lpthread -Wl,--no-as-needed

这样运行就不会报错了。

本文参考自：https://stackoverflow.com/questions/19463602/compiling-multithread-code-with-g#