Enable win32 and win64 CI targets

Signed-off-by: falkTX <falktx@falktx.com>

.github/workflows/build.yml

@@ -174,6 +174,69 @@ jobs:
             !bin/vst2
             !bin/vst3
 
+  win32:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Set up dependencies
+        run: |
+          sudo dpkg --add-architecture i386
+          sudo apt-get update -qq
+          sudo apt-get install -yq binutils-mingw-w64-i686 g++-mingw-w64-i686 mingw-w64 wine-stable:i386
+      - name: Build win32 cross-compiled
+        env:
+          CC: i686-w64-mingw32-gcc
+          CXX: i686-w64-mingw32-g++
+          EXE_WRAPPER: wine
+          PKG_CONFIG: "false"
+          WINEDEBUG: "-all"
+        run: |
+          make features
+          make -j $(nproc)
+      - name: Set sha8
+        id: slug
+        run: echo "::set-output name=sha8::$(echo ${{ github.sha }} | cut -c1-8)"
+      - uses: actions/upload-artifact@v2
+        with:
+          name: ${{ github.event.repository.name }}-win32-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}
+          path: |
+            bin/*
+            !bin/*-ladspa.dll
+            !bin/*-dssi.dll
+
+  win64:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Set up dependencies
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -yq binutils-mingw-w64-x86-64 g++-mingw-w64-x86-64 mingw-w64 wine-stable
+      - name: Build win64 cross-compiled
+        env:
+          CC: x86_64-w64-mingw32-gcc
+          CXX: x86_64-w64-mingw32-g++
+          EXE_WRAPPER: wine
+          PKG_CONFIG: "false"
+          WINEDEBUG: "-all"
+        run: |
+          make features
+          make -j $(nproc)
+      - name: Set sha8
+        id: slug
+        run: echo "::set-output name=sha8::$(echo ${{ github.sha }} | cut -c1-8)"
+      - uses: actions/upload-artifact@v2
+        with:
+          name: ${{ github.event.repository.name }}-win64-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}
+          path: |
+            bin/*
+            !bin/*-ladspa.dll
+            !bin/*-dssi.dll
+
   plugin-validation:
     runs-on: ubuntu-20.04
     steps: