ci: Build vkd3d with MinGW too.

Nowadays vkd3d is probably most commonly used compiled as PE rather then
ELF, so it makes sense to at least ensure that compilation succeeds.
In the future it would be nice to somehow test these binaries as well.

gitlab/build-mingw

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+echo "Building $(git log -1)"
+echo "---"
+
+COMMIT=$(printf '%03d-%s' $(git cherry $CI_MERGE_REQUEST_DIFF_BASE_SHA HEAD^ | wc -l) $(git rev-parse --short HEAD))
+
+set -Eeuxo pipefail
+
+./autogen.sh
+rm -fr build
+mkdir build
+cd build
+mkdir vulkan-headers
+cp -r /usr/include/vulkan /usr/include/vk_video /usr/include/spirv vulkan-headers
+../configure --enable-demos --disable-doxygen-doc --without-ncurses --host=$HOST SONAME_LIBVULKAN="vulkan-1.dll" CPPFLAGS="-I$PWD/vulkan-headers" CFLAGS="-g -O2 -Wno-format -Wno-array-bounds" LDFLAGS="-static-libgcc" && \
+    make -j$(nproc) && \
+    make -j$(nproc) install DESTDIR="$PWD/destdir" || \
+        touch ../pipeline_failed
+
+mkdir -p ../artifacts/$COMMIT
+cp destdir/usr/local/bin/* ../artifacts/$COMMIT
+
+git reset --hard

gitlab/build.yml

@@ -82,6 +82,41 @@ build-crosstest:
     paths:
       - artifacts
 
+.build-mingw:
+  stage: build
+  rules:
+    - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+  image: $CI_REGISTRY/wine/vkd3d:debian-bookworm
+  interruptible: true
+  needs:
+    - job: build-image
+      optional: true
+  dependencies: []
+  script:
+    - git config --global --add safe.directory $CI_PROJECT_DIR
+    - git clean -fdx
+    - git reset --hard
+    - rm -fr .git/rebase-merge
+    - mkdir artifacts
+    - cat /proc/cpuinfo > artifacts/cpuinfo.txt
+    - cat /proc/meminfo > artifacts/meminfo.txt
+    - git rebase $CI_MERGE_REQUEST_DIFF_BASE_SHA --exec ./gitlab/build-mingw
+    - if [ -f pipeline_failed ] ; then exit 1 ; fi
+  artifacts:
+    when: always
+    paths:
+      - artifacts
+
+build-mingw-64:
+  extends: .build-mingw
+  variables:
+    HOST: "x86_64-w64-mingw32"
+
+build-mingw-32:
+  extends: .build-mingw
+  variables:
+    HOST: "i686-w64-mingw32"
+
 build-mac:
   stage: build
   rules: