CI: Add Cygwin CMake run

.github/workflows/main-cmake.yml

@@ -2,6 +2,9 @@ name: NetCDF-C CMake CI - Windows
 
 on: [pull_request, workflow_dispatch]
 
+env:
+  REMOTETESTDOWN: ${{ vars.REMOTETESTDOWN }}
+
 concurrency:  
   group: ${{ github.workflow }}-${{ github.head_ref }}  
   cancel-in-progress: true
@@ -160,4 +163,4 @@ jobs:
           run: |
             cd build
             PATH=~/tmp/bin:$PATH ctest . --rerun-failed --output-on-failure -VV
-          if: ${{ failure() }}    
+          if: ${{ failure() }}    

.github/workflows/run_tests_cdash.yml

@@ -4,8 +4,11 @@
 
 name: Run CDash Ubuntu/Linux netCDF Tests
 
-on: workflow_dispatch
+on: [workflow_dispatch]
 
+env:
+  REMOTETESTDOWN: ${{ vars.REMOTETESTDOWN }}
+
 concurrency:  
   group: ${{ github.workflow}}-${{ github.head_ref }}  
   cancel-in-progress: true

.github/workflows/run_tests_osx.yml

@@ -300,7 +300,7 @@ jobs:
 
       - name: Configure
         shell: bash -l {0}
-        run: CFLAGS=${CFLAGS} LDFLAGS=${LDFLAGS} LD_LIBRARY_PATH=${LD_LIBRARY_PATH} ./configure --enable-hdf5 --enable-dap --disable-dap-remote-tests --disable-xml2
+        run: CFLAGS=${CFLAGS} LDFLAGS=${LDFLAGS} LD_LIBRARY_PATH=${LD_LIBRARY_PATH} ./configure --enable-hdf5 --enable-dap --disable-dap-remote-tests --disable-libxml2
         if: ${{ success() }}
 
       - name: Look at config.log if error

.github/workflows/run_tests_ubuntu.yml

@@ -4,7 +4,10 @@
 
 name: Run Ubuntu/Linux netCDF Tests
 
-on: [pull_request, workflow_dispatch]
+on: [pull_request,workflow_dispatch]
+
+env:
+  REMOTETESTDOWN: ${{ vars.REMOTETESTDOWN }}
 
 concurrency:  
   group: ${{ github.workflow}}-${{ github.head_ref }}  
@@ -171,7 +174,7 @@ jobs:
 
       - name: Configure
         shell: bash -l {0}
-        run: CFLAGS=${CFLAGS} LDFLAGS=${LDFLAGS} LD_LIBRARY_PATH=${LD_LIBRARY_PATH} ./configure --enable-hdf5 --enable-dap --disable-dap-remote-tests  --enable-doxygen  --enable-external-server-tests --disable-xml2
+        run: CFLAGS=${CFLAGS} LDFLAGS=${LDFLAGS} LD_LIBRARY_PATH=${LD_LIBRARY_PATH} ./configure --enable-hdf5 --enable-dap --disable-dap-remote-tests  --enable-doxygen  --enable-external-server-tests --disable-libxml2
         if: ${{ success() }}
 
       - name: Look at config.log if error
@@ -266,7 +269,7 @@ jobs:
 
       - name: Configure
         shell: bash -l {0}
-        run: CFLAGS=${CFLAGS} LDFLAGS=${LDFLAGS} LD_LIBRARY_PATH=${LD_LIBRARY_PATH} ./configure --enable-hdf5 --enable-dap --disable-dap-remote-tests  --enable-doxygen  --enable-external-server-tests --disable-xml2 --disable-shared --enable-static
+        run: CFLAGS=${CFLAGS} LDFLAGS=${LDFLAGS} LD_LIBRARY_PATH=${LD_LIBRARY_PATH} ./configure --enable-hdf5 --enable-dap --disable-dap-remote-tests  --enable-doxygen  --enable-external-server-tests --disable-libxml2 --disable-shared --enable-static
         if: ${{ success() }}
 
       - name: Look at config.log if error

.github/workflows/run_tests_win_cygwin.yml

@@ -10,13 +10,14 @@ env:
   SHELLOPTS: igncr
   CHERE_INVOKING: 1
   CYGWIN_NOWINPATH: 1
+  REMOTETESTDOWN: ${{ vars.REMOTETESTDOWN }}
 
 jobs:
   build-and-test-autotools:
     runs-on: windows-latest
     defaults:
       run:
-        shell: bash -eo pipefail -o igncr "{0}"
+        shell: C:/cygwin/bin/bash.exe -eo pipefail -o igncr "{0}"
 
     name: Cygwin-based Autotools tests
 
@@ -26,18 +27,20 @@ jobs:
 
     steps:
       - name: Fix line endings
+        shell: pwsh
         run: git config --global core.autocrlf input
 
       - uses: actions/checkout@v4
 
-      - uses: cygwin/cygwin-install-action@v2
+      - uses: cygwin/cygwin-install-action@v4
         with:
           platform: x86_64
+          install-dir: 'C:\cygwin'
           packages: >-
             git automake libtool autoconf2.5 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
+            libdeflate-devel gcc-core gcc-g++ libcurl-devel libiconv-devel
             libssl-devel libcrypt-devel
 
       - name: (Autotools) Run autoconf and friends
@@ -79,3 +82,72 @@ jobs:
         timeout-minutes: 30
         run: |
           make check -j8 SHELL=/bin/dash
+
+  build-and-test-cmake:
+    name: Cygwin-based CMake tests
+    runs-on: windows-latest
+    defaults:
+      run:
+        shell: C:/cygwin/bin/bash.exe -eo pipefail -o igncr "{0}"
+
+    steps:
+
+      - run: git config --global core.autocrlf input
+        shell: pwsh
+      - uses: actions/checkout@v4
+      - uses: cygwin/cygwin-install-action@v4
+        with:
+          platform: x86_64
+          install-dir: 'C:\cygwin'
+          packages: >-
+            git automake libtool autoconf2.5 make libhdf5-devel
+            libhdf4-devel zipinfo libxml2-devel perl zlib-devel
+            libzstd-devel libbz2-devel libaec-devel libzip-devel
+            libdeflate-devel gcc-core gcc-g++ libcurl-devel libiconv-devel
+            libssl-devel libcrypt-devel cmake ninja make m4 diffutils unzip
+
+###
+# Configure and build
+###
+
+      - name: (CMake) Configure Build
+        env:
+          MAKE: "/usr/bin/make"
+          CXX: "/usr/bin/g++"
+        run: |
+          /usr/bin/cmake \
+          -G"Unix Makefiles" \
+          -B build \
+          -S . \
+          -DCMAKE_INSTALL_PREFIX=/tmp \
+          -DBUILD_SHARED_LIBS=ON \
+          -DNETCDF_ENABLE_NETCDF_4=ON \
+          -DNETCDF_BUILD_UTILITIES=ON \
+          -DNETCDF_ENABLE_TESTS=ON \
+          -DNETCDF_ENABLE_HDF5=ON \
+          -DNETCDF_ENABLE_NCZARR=TRUE \
+          -DNETCDF_ENABLE_PLUGINS=ON
+        if: ${{ success() }}
+
+      - name: (CMake) Look at CMakeCache.txt if error
+        run: cat build/CMakeCache.txt
+        if: ${{ failure() }}
+
+      - name: (CMake) Print Summary
+        run: cat build/libnetcdf.settings
+
+      - name: (CMake) Build All
+        env:
+          MAKE: "/usr/bin/make"
+          CXX: "/usr/bin/g++"
+        run: cmake --build build -j$(nproc)
+        if: ${{ success() }}
+
+      - name: (CMake) Run Tests
+        run: PATH=$PWD/build:$PATH ctest --test-dir build
+        if: ${{ success() }}
+
+      - name: (CMake) Verbose output of CTest failures
+        run: >-
+          PATH=$PWD/build:$PATH ctest --test-dir build --output-on-failure -j$(nproc) --rerun-failed -VV
+        if: ${{ failure() }}

.github/workflows/run_tests_win_mingw.yml

@@ -6,6 +6,10 @@
 
 name: Run MSYS2, MinGW64-based Tests (Not Visual Studio)
 
+env:
+  CPPFLAGS: "-D_BSD_SOURCE"
+  REMOTETESTDOWN: ${{ vars.REMOTETESTDOWN }}
+
 on: [pull_request,workflow_dispatch]
 
 concurrency: