Build with Cygwin via GitHub Actions

.github/workflows/main.yml

@@ -8,7 +8,7 @@ on:
 defaults:
   run:
     shell: bash
-    
+
 jobs:
   build-autoconf:
     name: linux-autoconf
@@ -92,3 +92,57 @@ jobs:
 
     - name: Test
       run: ctest --test-dir build --build-config ${{ matrix.configuration }} --verbose
+
+  build-cmake-cygwin:
+    name: ${{ matrix.toolchain }}
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        toolchain:
+          - windows-cygwin
+
+        configuration:
+          - Release
+
+        include:
+          - toolchain: windows-cygwin
+            os: windows-latest
+            compiler: gcc
+
+    steps:
+    - name: Set git to use LF
+      run: git config --global core.autocrlf input
+
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Setup cygwin
+      uses: cygwin/cygwin-install-action@master
+      with:
+        packages: >-
+          cmake
+          gcc-core
+          gcc-g++
+          make
+          ninja
+
+    - name: Configure (${{ matrix.configuration }})
+      run: |
+        export PATH=/usr/bin:$PATH
+        cmake -S . -Bbuild -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} -DCMAKE_UNITY_BUILD=ON -DCMAKE_COMPILE_WARNING_AS_ERROR=ON -DBUILD_TESTING=ON -G Ninja
+      shell: C:\cygwin\bin\bash.exe -eo pipefail -o igncr '{0}'
+      env:
+        CYGWIN_NOWINPATH: 1
+
+    - name: Build with ${{ matrix.compiler }}
+      run: |
+        export PATH=/usr/bin:$PATH
+        cmake --build build
+      shell: C:\cygwin\bin\bash.exe -eo pipefail -o igncr '{0}'
+
+    - name: Test
+      run: |
+        export PATH=/usr/bin:$PATH
+        ctest --test-dir build --build-config ${{ matrix.configuration }} --verbose
+      shell: C:\cygwin\bin\bash.exe -eo pipefail -o igncr '{0}'