Attempt to use CodeQL

.github/workflows/codeql.yml

@@ -0,0 +1,51 @@
+name: "CodeQL"
+
+on: [ push ]
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-22.04
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'cpp' ]
+        target_arch: [ amd64, aarch64 ]
+        include:
+          - target_arch: amd64
+            target: amd64
+          - target_arch: aarch64
+            target: arm64
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - run: |
+      sudo apt-get update --quiet || true
+      sudo apt-get -yq --no-install-suggests --no-install-recommends install bmake libarchive-dev clang-14 lld-14
+
+    - name: create environment
+      run: |
+        echo "GITHUB_WORKSPACE = $GITHUB_WORKSPACE"
+        echo "EXTRA_BUILD_ARGS=--cross-bindir=/usr/lib/llvm-14/bin" >> $GITHUB_ENV
+        mkdir -p ../build
+        echo "MAKEOBJDIRPREFIX=${PWD%/*}/build" >> $GITHUB_ENV
+        # heh, works on Linux/BSD/macOS ...
+        echo "NPROC=`getconf _NPROCESSORS_ONLN 2>/dev/null || getconf NPROCESSORS_ONLN 2>/dev/null || echo 1`" >> $GITHUB_ENV
+
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+
+    - name: bootstrap bmake
+      run: ./tools/build/make.py --debug $EXTRA_BUILD_ARGS TARGET=${{ matrix.target }} TARGET_ARCH=${{ matrix.target_arch }} -n
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2