git: use clang-17 to build gap

.github/workflows/build.yml

@@ -27,12 +27,14 @@ jobs:
 
     - name: Install dependencies
       run: |
+        wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
         sudo add-apt-repository ppa:ubuntu-toolchain-r/test
+        sudo add-apt-repository -y "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-17 main"
         sudo apt-get update
         sudo apt-get install -y \
              gpg wget curl zip unzip tar git pkg-config \
              ninja-build clang-tidy cppcheck ccache build-essential \
-             doctest-dev
+             doctest-dev clang-17 libstdc++12-dev
 
     - name: "Create directory '${{ env.VCPKG_DEFAULT_BINARY_CACHE }}'"
       run: mkdir -p $VCPKG_DEFAULT_BINARY_CACHE
@@ -50,6 +52,7 @@ jobs:
     - name: Run cmake
       uses: lukka/run-cmake@v10
       with:
+          configurePresetAdditionalArgs: "['-DCMAKE_C_COMPILER=clang-17', '-DCMAKE_CXX_COMPILER=clang++-17']"
           configurePreset: 'ninja-multi-vcpkg'
           buildPreset: 'ninja-vcpkg-deb'
           testPreset: 'ninja-vcpkg-deb'