Update build_and_test.yml

Author: tobe2098

.github/workflows/build_and_test.yml

@@ -56,15 +56,15 @@ jobs:
         uses: actions/checkout@v4
 
       # 2. Setup C++ environment (Linux/macOS)
-      # - name: Setup GCC/Clang (Linux)
-      #   if: matrix.os == 'ubuntu-latest'
-      #   run: |
-      #     sudo apt-get update
-      #     if [ "${{ matrix.compiler }}" = "gcc" ]; then
-      #       sudo apt-get install -y gcc-11 g++-11
-      #     else
-      #       sudo apt-get install -y clang-14 clang++-14
-      #     fi
+      - name: Setup GCC/Clang (Linux)
+        if: matrix.os == 'ubuntu-latest'
+        run: |
+          sudo apt-get update
+          if [ "${{ matrix.compiler }}" = "gcc" ]; then
+            sudo apt-get install -y gcc-11 g++-11
+          else
+            sudo apt-get install -y clang-14 clang++-14
+          fi
 
       # 3. Setup C++ environment (macOS)
       - name: Setup Clang (macOS)