Add Windows CI

.github/workflows/ci.yml

@@ -1,3 +1,5 @@
+# TODO: test more stuff on Windows.
+
 name: CI
 
 on:
@@ -13,7 +15,14 @@ env:
 
 jobs:
   build:
-    runs-on: ubuntu-24.04
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os:
+          - ubuntu-24.04
+          - windows-2025
+
     steps:
       - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
@@ -24,6 +33,7 @@ jobs:
           components: clippy
 
       - name: Download and install GCC fork
+        if: ${{ matrix.os == 'ubuntu-24.04' }}
         run: |
           curl -LO https://github.com/antoyo/gcc/releases/latest/download/gcc-15.deb
           sudo dpkg --force-overwrite -i gcc-15.deb
@@ -51,17 +61,24 @@ jobs:
           key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('rust-toolchain') }}
 
       - name: Build
+        if: ${{ matrix.os == 'ubuntu-24.04' }}
         run: |
           cargo build
           cargo build --features master,dlopen
           cargo build --examples
 
+      - name: Build
+        if: ${{ matrix.os == 'windows-2025' }}
+        run: cargo build --features master,dlopen
+
       - name: Test
+        if: ${{ matrix.os == 'ubuntu-24.04' }}
         run: |
           cd examples/factorial
           cargo build
 
       - name: clippy
+        if: ${{ matrix.os == 'ubuntu-24.04' }}
         run: |
           cargo clippy --all-targets -- -D warnings
           cargo clippy --all-targets --features master,dlopen -- -D warnings