Tracking issue for this possibility.

Upstream QEMU builds mingw64 qemu using a fedora cross-compiler container in their GitLab CI.

This would be a.. rather advanced set of build instructions though.

Extra requirements:

• Docker for Windows with WSL2 Backend Enabled
• TBD

Possible steps (WIP, based on their GitLab yamls):

# FIXME: Do we need recursive? This downloads 2.4 G of .. stuff.
# FIXME: Pick a tag, not main!
$ git clone --recursive https://gitlab.com/qemu-project/qemu.git
$ cd qemu
# Build fedora 33 cross compiler container: 
$  ./tests/docker/docker.py --engine docker build -t "qemu/fedora-win64-cross" -f "tests/docker/dockerfiles/fedora-win64-cross.docker"
# FIXME: Docker gurus save me ....
$ docker run -it --rm -v $PWD:$PWD qemu/fedora-win64-cross
[root@c2a9212b7d19 /]# cd /home/andrew/qemu
[root@c2a9212b7d19 qemu]# mkdir build
[root@c2a9212b7d19 qemu]# cd build

# Install extra deps that QEMU CI doesn't for some reason
[root@c2a9212b7d19 qemu]# dnf install -y mingw64-gnutls mingw64-SDL2 mingw32-nsis

[root@c2a9212b7d19 build]# ../configure \
--cross-prefix=x86_64-w64-mingw32- \
--disable-capstone \
--enable-gtk \
--disable-docs \
--enable-werror \
--enable-tools \
--enable-trace-backends=simple \
--enable-gnutls \
--enable-nettle \
--enable-curl \
--enable-vnc \
--enable-bzip2 \
--enable-guest-agent \
--enable-sdl \
--target-list=x86_64-softmmu,i386-softmmu 

[root@c2a9212b7d19 build]# TODO Figure out where to get WinHvPlatform.h from...
[root@c2a9212b7d19 build]# make -j4 all
[root@c2a9212b7d19 build]# make -j4 installer

Sad things:

Seems the really interesting virtio options are not supported

../meson.build:1184:6: ERROR: Problem encountered: virtio-9p (virtfs) requires Linux
# No sys/socket.h so no virtio-net