Boost::process on Windows - with MinGW?

I have a C++17 application using nothing but STL and boost 1.71.0. The application needs to run on Windows, Linux and BSD. On Windows I use GCC 9.2 provided by MinGW-w64. I use the distribution that comes with MSYS2.

I need to have the ability to create a system process (launching an external application from within my C++ application).

In the past I used QProcess of the Qt libraries for this. However, this application doesn't have any Qt dependencies and I'd like to prevent adding Qt dependencies just for this one feature.

Looking for solutions I came across boost::process. On first glance this seems like a very suitable alternative to QProcess.

I started by creating a minimal application using C++17, cmake and boost:

#include <iostream>
#include <boost/process.hpp>

int main() {
    int result = boost::process::system("g++ main.cpp");

    return 0;
}

Unfortunately, I ran into compilation errors straight away:

====================[ Build | boost_process_test | Debug ]======================
C:\Users\joel\AppData\Local\JetBrains\Toolbox\apps\CLion\ch-0\193.5233.103\bin\cmake\win\bin\cmake.exe --build C:\Users\joel\Documents\projects\boost_process_test\cmake-build-debug --target boost_process_test -- -j 6
Scanning dependencies of target boost_process_test
[ 50%] Building CXX object CMakeFiles/boost_process_test.dir/main.cpp.obj
In file included from C:/msys64/mingw64/include/boost/process/detail/windows/handles.hpp:11,
                 from C:/msys64/mingw64/include/boost/process/detail/used_handles.hpp:17,
                 from C:/msys64/mingw64/include/boost/process/detail/windows/async_in.hpp:20,
                 from C:/msys64/mingw64/include/boost/process/async.hpp:49,
                 from C:/msys64/mingw64/include/boost/process.hpp:23,
                 from C:\Users\joel\Documents\projects\boost_process_test\main.cpp:2:
C:/msys64/mingw64/include/boost/process/detail/windows/handle_workaround.hpp:208:51: error: expected ')' before '*' token
  208 | typedef ::boost::winapi::NTSTATUS_ (__kernel_entry *nt_system_query_information_p )(
      |                                    ~              ^~
      |                                                   )
C:/msys64/mingw64/include/boost/process/detail/windows/handle_workaround.hpp:223:51: error: expected ')' before '*' token
  223 | typedef ::boost::winapi::NTSTATUS_ (__kernel_entry *nt_query_object_p )(
      |                                    ~              ^~
      |                                                   )
C:/msys64/mingw64/include/boost/process/detail/windows/handle_workaround.hpp: In function 'boost::winapi::NTSTATUS_ boost::process::detail::windows::workaround::nt_system_query_information(boost::process::detail::windows::workaround::SYSTEM_INFORMATION_CLASS_, void*, boost::winapi::ULONG_, boost::winapi::PULONG_)':
C:/msys64/mingw64/include/boost/process/detail/windows/handle_workaround.hpp:239:12: error: 'nt_system_query_information_p' does not name a type; did you mean 'nt_system_query_information'?
  239 |     static nt_system_query_information_p f = reinterpret_cast<nt_system_query_information_p>(::boost::winapi::get_proc_address(h, "NtQuerySystemInformation"));
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |            nt_system_query_information
In file included from C:/msys64/mingw64/include/boost/process/detail/windows/handles.hpp:11,
                 from C:/msys64/mingw64/include/boost/process/detail/used_handles.hpp:17,
                 from C:/msys64/mingw64/include/boost/process/detail/windows/async_in.hpp:20,
                 from C:/msys64/mingw64/include/boost/process/async.hpp:49,
                 from C:/msys64/mingw64/include/boost/process.hpp:23,
                 from C:\Users\joel\Documents\projects\boost_process_test\main.cpp:2:
C:/msys64/mingw64/include/boost/process/detail/windows/handle_workaround.hpp:241:14: error: 'f' was not declared in this scope
  241 |     return (*f)(SystemInformationClass, SystemInformation, SystemInformationLength, ReturnLength);
      |              ^
C:/msys64/mingw64/include/boost/process/detail/windows/handle_workaround.hpp: In function 'boost::winapi::BOOL_ boost::process::detail::windows::workaround::nt_query_object(boost::winapi::HANDLE_, boost::process::detail::windows::workaround::OBJECT_INFORMATION_CLASS_, void*, boost::winapi::ULONG_, boost::winapi::PULONG_)':
C:/msys64/mingw64/include/boost/process/detail/windows/handle_workaround.hpp:253:12: error: 'nt_query_object_p' does not name a type; did you mean 'nt_query_object'?
  253 |     static nt_query_object_p f = reinterpret_cast<nt_query_object_p>(::boost::winapi::get_proc_address(h, "NtQueryObject"));
      |            ^~~~~~~~~~~~~~~~~
      |            nt_query_object
C:/msys64/mingw64/include/boost/process/detail/windows/handle_workaround.hpp:255:14: error: 'f' was not declared in this scope
  255 |     return (*f)(Handle, ObjectInformationClass, ObjectInformation, ObjectInformationLength, ReturnLength);
      |              ^
mingw32-make.exe[3]: *** [CMakeFiles\boost_process_test.dir\build.make:62: CMakeFiles/boost_process_test.dir/main.cpp.obj] Error 1
mingw32-make.exe[2]: *** [CMakeFiles\Makefile2:75: CMakeFiles/boost_process_test.dir/all] Error 2
mingw32-make.exe[1]: *** [CMakeFiles\Makefile2:82: CMakeFiles/boost_process_test.dir/rule] Error 2
mingw32-make.exe: *** [Makefile:117: boost_process_test] Error 2

Here is my corresponding CMakeLists.txt:

cmake_minimum_required(VERSION 3.15)
project(boost_process_test)

set(CMAKE_CXX_STANDARD 17)

find_package(Boost 1.71.0 REQUIRED)

add_executable(boost_process_test main.cpp)

I consulted the boost.process documentation to figure out what kind of dependencies & compatibilities there are. Unfortunately, I couldn't find much info on this.

Before I start getting too deep into actually debugging this - Does somebody know whether boost.process as of version 1.71.0 actually runs on Windows and if so - whether it works with GCC / MinGW and not just MSVC? And if MinGW/GCC is supported - does it rely on posix or win32api?