ci: clang support added to CI

.github/workflows/ci-conan.yml

@@ -46,12 +46,26 @@ jobs:
         - {
             name: "Ubuntu GCC 10.1.0",
             os: ubuntu-18.04,
-            compiler: { type: GCC, version: 10, cc: "gcc-10", cxx: "g++-10" }
+            compiler: { type: GCC, version: 10, cc: "gcc-10", cxx: "g++-10" },
+            lib: "libstdc++11"
           }
         - {
             name: "Ubuntu GCC 10.2.0",
             os: ubuntu-20.04,
-            compiler: { type: GCC, version: 10, cc: "gcc-10", cxx: "g++-10" }
+            compiler: { type: GCC, version: 10, cc: "gcc-10", cxx: "g++-10" },
+            lib: "libstdc++11"
+          }
+        - {
+            name: "Ubuntu Clang 12.0.0 + libstdc++11",
+            os: ubuntu-20.04,
+            compiler: { type: CLANG, version: 12, cc: "clang-12", cxx: "clang++-12" },
+            lib: "libstdc++11"
+          }
+        - {
+            name: "Ubuntu Clang 12.0.0 + libc++",
+            os: ubuntu-20.04,
+            compiler: { type: CLANG, version: 12, cc: "clang-12", cxx: "clang++-12" },
+            lib: "libc++"
           }
         # In case a Conan docker image will be needed to provide a specific configuration we can use a Docker image as follows
         # - {
@@ -64,6 +78,15 @@ jobs:
         downcast_mode: [ "on", "auto" ]
     steps:
       - uses: actions/checkout@v2
+      - name: Install Clang
+        if: matrix.config.compiler.type == 'CLANG'
+        shell: bash
+        working-directory: ${{ env.HOME }}
+        run: |
+          wget https://apt.llvm.org/llvm.sh
+          chmod +x llvm.sh
+          sudo ./llvm.sh ${{ matrix.config.compiler.version }}
+          sudo apt install -y libc++-${{ matrix.config.compiler.version }}-dev
       - name: Install Ninja
         # TODO Find a proper syntax to make the below work
         # if: !matrix.config.docker_image
@@ -90,10 +113,8 @@ jobs:
         shell: bash
         run: |
           conan profile new --detect default
-          if [ ${{ matrix.config.compiler.type }} == 'GCC' ]; then
-            conan profile update settings.compiler.libcxx=libstdc++11 default
-          elif [ ${{ matrix.config.compiler.type }} == 'CLANG' ]; then
-            conan profile update settings.compiler.libcxx=libc++ default
+          if [ ${{ matrix.config.compiler.type }} == 'GCC' | ${{ matrix.config.compiler.type }} == 'CLANG' ]; then
+            conan profile update settings.compiler.libcxx=${{ matrix.config.lib }} default
           fi
           conan profile show default
       - name: Run Conan Package Tools