CI: Compile openpilot on macOS (#32909)

* working

* cache

* bring back

.github/workflows/selfdrive_tests.yaml

@@ -106,8 +106,17 @@ jobs:
         SKIP_PROMPT: 1
         # package install has DeprecationWarnings
         PYTHONWARNINGS: default
-    - name: Test openpilot environment
-      run: . .venv/bin/activate && scons -h
+    - run: echo "CACHE_COMMIT_DATE=$(git log -1 --pretty='format:%cd' --date=format:'%Y-%m-%d-%H:%M')" >> $GITHUB_ENV
+    - name: Getting scons cache
+      uses: 'actions/cache@v4'
+      with:
+        path: /tmp/scons_cache
+        key: scons-${{ runner.arch }}-macos-${{ env.CACHE_COMMIT_DATE }}-${{ github.sha }}
+        restore-keys: |
+          scons-${{ runner.arch }}-macos-${{ env.CACHE_COMMIT_DATE }}
+          scons-${{ runner.arch }}-macos
+    - name: Building openpilot
+      run: . .venv/bin/activate && scons -j$(nproc)
 
   static_analysis:
     name: static analysis

tools/mac_setup.sh

@@ -63,6 +63,7 @@ brew "qt@5"
 brew "zeromq"
 cask "gcc-arm-embedded"
 brew "portaudio"
+brew "gcc@13"
 EOS
 
 echo "[ ] finished brew install t=$SECONDS"