Fix CodeQL analysis for C++

.github/workflows/codeql-analysis.yml

@@ -44,19 +44,16 @@ jobs:
 
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
-    - name: Autobuild
+    - if: matrix.language == 'python'
+      name: Autobuild Python
       uses: github/codeql-action/autobuild@v1
 
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 https://git.io/JvXDl
-
-    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
-    #    and modify them (or add more) to build your code if your project
-    #    uses a compiled language
-
-    #- run: |
-    #   make bootstrap
-    #   make release
+    - if: matrix.language == 'cpp'
+      name: Build C++
+      run: |
+        mkdir build && cd build
+        cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
+        make
 
     - name: Perform CodeQL Analysis
       uses: github/codeql-action/analyze@v1