adding clang workflow

.github/workflows/Linux_clang.yml

@@ -0,0 +1,95 @@
+# This is a GitHub actions workflow for NCEPLIBS-g2.
+#
+# This builds with clang.
+#
+# Ed Hartnett, 8/21/24
+name: Linux_clang
+on:
+  push:
+    branches:
+    - develop
+  pull_request:
+    branches:
+    - develop
+
+# Cancel in-progress workflows when pushing to a branch
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  Linux_clang:
+    runs-on: ubuntu-latest
+    env:
+      FC: gfortran
+      CC: clang
+      LD_LIBRARY_PATH: /home/runner/work/NCEPLIBS-g2/NCEPLIBS-g2/nceplibs/jasper/lib/
+    strategy:
+#      fail-fast: true
+      matrix:
+        bacio-version: [2.6.0]
+        w3emc-version: [2.11.0]
+        config:
+        - {
+            options: "-DCMAKE_BUILD_TYPE=Debug"
+          }
+        - {
+            options: '-DCMAKE_C_Fortran_FLAGS="-g" -DLOGGING=ON'
+          }
+        - {
+            options: "-DBUILD_WITH_W3EMC=OFF"
+          }
+        - {
+            options: "-DBUILD_UTILS=ON -DBUILD_WITH_W3EMC=OFF"
+          }
+
+    steps:
+
+    - name: install-dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install libpng-dev zlib1g-dev libjpeg-dev clang
+
+    - name: "Build dependencies"
+      uses: NOAA-EMC/ci-build-nceplibs@develop
+      with:
+        bacio-version: v${{ matrix.bacio-version }}
+        g2c-version: develop
+        jasper-version: version-4.0.0
+        w3emc-version: v${{ matrix.w3emc-version }}
+        w3emc-cmake-args: -DBUILD_WITH_BUFR=OFF -DBUILD_WITH_EXTRA_DEPS=ON
+        ip-version: develop
+
+    - name: checkout
+      uses: actions/checkout@v4
+      with:
+        path: g2
+
+    - name: cache-data
+      id: cache-data
+      uses: actions/cache@v4
+      with:
+        path: ~/data
+        key: data-5
+
+    - name: build
+      run: |
+        set -x
+        cd g2
+        mkdir build
+        cd build
+        clang --version
+        gfortran --version
+        cmake ${{ matrix.config.options }} -DCMAKE_PREFIX_PATH="$GITHUB_WORKSPACE/nceplibs/jasper;$GITHUB_WORKSPACE/nceplibs/NCEPLIBS-g2c;$GITHUB_WORKSPACE/nceplibs/NCEPLIBS-bacio;$GITHUB_WORKSPACE/nceplibs/NCEPLIBS-w3emc;$GITHUB_WORKSPACE/nceplibs/NCEPLIBS-ip" -DFTP_TEST_FILES=ON -DTEST_FILE_DIR=/home/runner/data ..
+        make -j2 VERBOSE=1
+
+    - name: cache-data
+      if: steps.cache-data.outputs.cache-hit != 'true'
+      run: |
+        mkdir ~/data
+        cp $GITHUB_WORKSPACE/g2/build/tests/data/* ~/data
+
+    - name: test
+      run: |
+        cd $GITHUB_WORKSPACE/g2/build
+        ctest --verbose --rerun-failed --output-on-failure