如何使用MinGW编译C ++ std :: thread代码？

Question

我想用MinGW编译我的c ++ 11项目（最近转移到c ++ 11）。我编译了关于c ++ 11代码的错误，比如“std :: thread not found”。

我使用了最后一个MinGW和gcc 5.3.0（2015年12月）。最后，我想在编译我的大项目之前只编译这个例子：

#include <iostream>
#include <thread>
#include <chrono>

void foo()
{
    // simulate expensive operation
    std::this_thread::sleep_for(std::chrono::seconds(1));
}

void bar()
{
    // simulate expensive operation
    std::this_thread::sleep_for(std::chrono::seconds(1));
}

int main()
{
    std::cout << "starting first helper...\n";
    std::thread helper1(foo);

    std::cout << "starting second helper...\n";
    std::thread helper2(bar);

    std::cout << "waiting for helpers to finish..." << std::endl;
    helper1.join();
    helper2.join();

    std::cout << "done!\n";
}

（来源：http://en.cppreference.com/w/cpp/thread/thread/join）

我试过“g ++ -std = c ++ 11 main.cpp”和“g ++ main.cpp -std = c ++ 0x”，但我总是遇到以下错误：

main.cpp: In function 'void foo()':
main.cpp:8:10: error: 'std::this_thread' has not been declared
     std::this_thread::sleep_for(std::chrono::seconds(1));
          ^
main.cpp: In function 'void bar()':
main.cpp:14:10: error: 'std::this_thread' has not been declared
     std::this_thread::sleep_for(std::chrono::seconds(1));
          ^
main.cpp: In function 'int main()':
main.cpp:20:5: error: 'thread' is not a member of 'std'
     std::thread helper1(foo);
     ^
main.cpp:23:5: error: 'thread' is not a member of 'std'
     std::thread helper2(bar);
     ^
main.cpp:26:5: error: 'helper1' was not declared in this scope
     helper1.join();
     ^
main.cpp:27:5: error: 'helper2' was not declared in this scope
     helper2.join();
     ^

Answer 1

MinGW主要没有glibc的端口，它支持像GCC一样的pthreading或gthreading。

为了解决这个问题，第一个解决方案是安装library of thread headers。另一个解决方案可以使用GCC编译器。