Update build_on_demand.yml

Author: Sygmei

.github/workflows/build_on_demand.yml

@@ -130,17 +130,28 @@ jobs:
         repository: Sygmei/ObEngine
         path: obengine
         ref: ${{ github.event.release.name }}
+    - name: Install LLVM & Clang
+      run: brew install llvm
     - name: Install SFML
       run: brew install sfml
+      env:
+        CC: /opt/homebrew/opt/llvm/bin/clang
+        CXX: /opt/homebrew/opt/llvm/bin/clang++
     - name: Create build directory
       working-directory: ./obengine
       run: mkdir build
     - name: Run CMake on ObEngine
       working-directory: ./obengine
       run: cd build && cmake -DBUILD_TESTS=ON -DBUILD_TOOLKIT=ON -DCMAKE_BUILD_TYPE=Release ..
+      env:
+        CC: /opt/homebrew/opt/llvm/bin/clang
+        CXX: /opt/homebrew/opt/llvm/bin/clang++
     - name: Compile ObEngine
       working-directory: ./obengine
       run: cd build && make -j8
+      env:
+        CC: /opt/homebrew/opt/llvm/bin/clang
+        CXX: /opt/homebrew/opt/llvm/bin/clang++
     - name: Run tests
       working-directory: ./obengine
       run: cd build && ./tests/ObEngineTests