如何在 Windows 上使用带有 POSIX 线程的 MinGW 上的 std::thread

Question

I have been trying to compile and run the following very simple bit of code

#include <thread>

using namespace std;

void thread_c() {
    for (int i = 0; i < 11; ++i) {
        cout << i;
    }
}

int main()
{
    thread t(thread_c);
    t.join();

    system("pause");
    return 0;
}

I am compiling on Windows 10 with MinGW 6.3.0 (target x86_64-w64-mingw32) and the thread model (obtained using g++ -v ) is POSIX.

I am not getting any compilation error with g++ -Wall -g test.cpp -o test.exe , however I am getting a runtime error when trying to run the exe ( entry point of _ZNSt6thread15_M_start_threadESt10unique_ptrINS_3_StateESt14default_deleteIS1_EEPFvve cannot be found ).

I also tried compiling with the -pthread or -lpthread flags, but I am getting the same runtime error. Obviously this seems to be related to the use of std::thread, but I didn't get how to fix this. Am I missing a compilation flag or additional library enabling POSIX thread support on Windows?

Edit: I managed to get it working by changing the compilation command to g++ -Wall -g test.cpp -o test.exe -static-libgcc -static-libstdc++ -Wl,-Bstatic -lstdc++ -lpthread -Wl,Bdynamic

Answer 1

I tried your code after making the necessary fixes:

#include <thread>
#include <iostream>

using namespace std;

void thread_c() {
    for (int i = 0; i < 11; ++i) {
        std::cout << i;
    }
}

int main()
{
    thread t(thread_c);
    t.join();

    system("pause");
    return 0;
}

and it worked fine. The build command was the same as yours:

g++ -Wall -g test.cpp -o test.exe

The output was:

012345678910Press any key to continue . . .

But I did use MinGW-w64 GCC 12.1.0 (fro https://winlibs.com/ ) instead of the very old version 6.3.0.

Maybe the MinGW-w64 (or was it still the old MinGW) library you were using was simply too old...