Test windows gnullvm in CI

.github/scripts/toolchains/x86_64-pc-windows-gnu-clang.cmake

@@ -1,3 +1,4 @@
 set(CMAKE_C_COMPILER "clang")
 set(CMAKE_CXX_COMPILER "clang++")
-set(CMAKE_C_COMPILER_TARGET "x86_64-pc-win32-gnu")
+set(CMAKE_C_COMPILER_TARGET "x86_64-pc-windows-gnu")
+set(CMAKE_CXX_COMPILER_TARGET "x86_64-pc-windows-gnu")

.github/workflows/test.yaml

@@ -143,6 +143,47 @@ jobs:
         working-directory: build
         run: ctest --output-on-failure --build-config Debug -j 3
 
+  windows_gnullvm:
+    name: Test Windows gnullvm
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - windows-2022
+        arch:
+          - x86_64
+          # - i686
+          # - aarch64
+        compiler:
+          - clang
+        generator:
+          - ninja
+          - make
+        include:
+          - cmake: 3.22.6
+          - rust: 1.79.0
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install CMake
+        uses: lukka/get-cmake@519de0c7b4812477d74976b2523a9417f552d126
+        with:
+          cmakeVersion: "${{ matrix.cmake }}"
+          ninjaVersion: "~1.10.0"
+      - name: Install Rust
+        id: install_rust
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: ${{matrix.rust}}
+          targets: ${{matrix.arch}}-pc-windows-gnullvm
+      - name: Configure
+        run: cmake -S. -Bbuild "-DRust_TOOLCHAIN=${{steps.install_rust.outputs.name}}" --preset "${{ matrix.generator }}-${{ matrix.arch }}-pc-windows-gnu-${{ matrix.compiler }}"
+      - name: Run Tests
+        working-directory: build
+        run: ctest --output-on-failure --build-config Debug -j 3
+
+
 # For now just test if hostbuild works when cross-compiling on windows.
 # For testing everything we would also need to install a cross-compiler first.
   windows_cross_hostbuild: