Thanks a lot for making this exciting x86 emulation project!! I tried to wine winecfg in FEXBash (wine-5.0 comes with RootFS Ubuntu 21.10), it does place files in ~/.wine but it doesn't show any GUI ...

calling SDL_CreateWindow(..., flags=SDL_WINDOW_OPENGL): this will ultimately lead to an "indirect call to null". I have a working patch for SDL2 (Note: in SDL3, the handling of EGL/emscripten was ...