I am trying to move away from using Visual Studio and use command-line compilation more, however I am having an issue with a project that uses ASIO in its header-only, standalone (non-boost) form compiled using Clang on Windows.

Both Visual Studio and Clang compile without errors, however when running the Clang version, I get a runtime error of thread: The attempted operation is not supported for the type of object referenced. when creating a asio::thread

A minimal example;

main.cpp

#include <iostream>
#include <vector>
#include <string>
#include <map>

#define _WIN32_WINNT 0x0601
#define ASIO_STANDALONE
#define STANDALONE
#include <asio.hpp>

void _stuff()
{
    std::cout << "B" << std::endl;
}


int main()
{
    asio::io_context ctx;
    std::cout << "A ";
    try
    {
        asio::thread thr(std::bind(&_stuff));
        thr.join();
    }
    catch (std::exception& e)
    {
        std::cout << e.what() << std::endl;
    }
}

Clang build command
clang++ -std=c++20 main.cpp -I"asio-1.30.2/include" -luser32 -lkernel32 -lshell32 -> 0

Visual Studio is configured as ‘standard’ for a blank C++ application with the exception of asio/include being added to the include path. Visual Studio also builds without issue.

The version built through Visual Studio works as expected outputting A B however the Clang version outputs

A 
thread: The attempted operation is not supported for the type of object referenced.

I have three possible guesses;

1. I have not configured ASIO correctly via the #define‘s
2. I have not linked the program properly
3. ASIO does not support building header-only, standalone, on windows using clang