Apply special treatment for clang 17

Author: wusatosi

.github/workflows/ci.yml

@@ -32,6 +32,13 @@ jobs:
       - uses: actions/checkout@v3
         with:
           submodules: 'true'
+        # If Clang 17, install a newer version of libc++ and libc++abi.
+      - name: Install libc++
+        if: matrix.config.tag == 'llvm-17'
+        run: |
+          set -x
+          sudo apt-get install -y libc++-dev libc++1 libc++abi-dev libc++abi1
+          find /usr/lib/x86_64-linux-gnu/ -name libc++.so* || true
       - name: Install Gcovr
         if: matrix.config.coverage
         run: |