.gitea: add windows build (experimental)

.gitea/workflows/release.yml

@@ -121,6 +121,35 @@ jobs:
         LINUX_SIGNING_KEY: ${{ secrets.LINUX_SIGNING_KEY }}
         AZURE_BLOBSTORE_TOKEN: ${{ secrets.AZURE_BLOBSTORE_TOKEN }}
 
+  windows:
+    name: Windows Build
+    runs-on: "win-11"
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: 1.24
+        cache: false
+
+    # Note: gcc.exe only works properly if the corresponding bin/ directory is
+    # contained in PATH.
+
+    - name: "Build (amd64)"
+      run: |
+        go run build/ci.go install -dlgo -arch amd64 -cc %GETH_CC%
+      env:
+        PATH: 'C:\msys64\mingw64\bin;C:\Program Files (x86)\NSIS\;%PATH%'
+        GETH_CC: 'C:\msys64\mingw64\bin\gcc.exe'
+
+    - name: "Build (386)"
+      run: |
+        go run build/ci.go install -dlgo -arch 386 -cc %GETH_CC%
+      env:
+        PATH: 'C:\msys64\mingw32\bin;C:\Program Files (x86)\NSIS\;%PATH%'
+        GETH_CC: 'C:\msys64\mingw32\bin\gcc.exe'
+
   docker:
     name: Docker Image
     runs-on: ubuntu-latest