CI: Set up a CMake run on Cygwin

There's talk of eliminating Autotools, so let's see if the alternative works.

.github/workflows/run_tests_win_cygwin.yml

@@ -79,3 +79,61 @@ jobs:
         timeout-minutes: 30
         run: |
           make check -j8 SHELL=/bin/dash
+  build-and-test-autotools:
+    runs-on: windows-latest
+    defaults:
+      run:
+        shell: bash -eo pipefail -o igncr "{0}"
+
+    name: Cygwin-based Autotools tests
+
+    strategy:
+      matrix:
+        build_dir: [".", "build"]
+
+    steps:
+      - name: Fix line endings
+        run: git config --global core.autocrlf input
+
+      - uses: actions/checkout@v3
+
+      - uses: cygwin/cygwin-install-action@v2
+        with:
+          platform: x86_64
+          packages: >-
+            git cmake ninja make libhdf5-devel
+            libhdf4-devel zipinfo libxml2-devel perl zlib-devel
+            libzstd-devel libbz2-devel libaec-devel libzip-devel
+            libdeflate-devel gcc-core libcurl-devel libiconv-devel
+            libssl-devel libcrypt-devel
+
+      - name: (CMake) Configure in-tree build
+        run: >-
+          cmake -B ${{ matrix.build_dir }} -S . -DCMAKE_INSTALL_PREFIX=/usr 
+          -DENABLE_NETCDF_4=ON -DENABLE_DAP=ON -DBUILD_UTILITIES=ON
+          -DBUILD_SHARED_LIBS=ON -DENABLE_TESTS=ON -DENABLE_DAP=TRUE
+          -DENABLE_HDF5=TRUE -DENABLE_NCZARR=TRUE -DENABLE_DAP_LONG_TESTS=TRUE
+
+      - name: Look at config.log if error
+        if: ${{ failure() }}
+        run: cat config.log
+
+      - name: Print summary
+        run: cat libnetcdf.settings
+
+      - name: (CMake) Build library and utilities
+        run: cmake --build -B ${{ matrix.build_dir }} -j8 SHELL=/bin/dash
+
+      - name: (CMake) Test DESTDIR install
+        run: |
+          cmake --build -B ${{ matrix.build_dir }} --target install DESTDIR=/tmp/pretend-root SHELL=/bin/dash
+          if [ -d "/tmp/pretend-root/$(pwd)" ];
+          then
+              find /tmp/pretend-root/$(pwd)
+              if [ $(find /tmp/pretend-root/$(pwd) -type f | wc -l) -gt 0 ]; then exit 1; fi
+          fi
+
+      - name: (CMake) Build and run tests
+        timeout-minutes: 30
+        run: |
+          ctest -B ${{ matrix.build_dir }} -j8 SHELL=/bin/dash