Add CodeQL workflow

.github/workflows/codeql.yml

@@ -0,0 +1,70 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ 'master', '3.3-stable', 'latest' ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ 'master' ]
+  schedule:
+    - cron: '40 4 * * 2'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'cpp' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
+        # Use only 'java' to analyze code written in Java, Kotlin or both
+        # Use only 'javascript' to analyze code written in JavaScript, TypeScript or both
+        # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
+
+    env:
+      CC: clang
+      CFLAGS: -Werror
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Install dependencies
+      run: |
+        sudo apt update
+        sudo apt install libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev libxext-dev wayland-protocols libwayland-dev libxkbcommon-dev
+
+    - name: Configure static library
+      run: cmake -S . -B build-static -D GLFW_BUILD_WAYLAND=ON
+
+    - name: Configure shared library
+      run: cmake -S . -B build-shared -D GLFW_BUILD_WAYLAND=ON -D BUILD_SHARED_LIBS=ON
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+
+        # For more details on CodeQL's query packs, refer to: https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
+        # queries: security-extended,security-and-quality
+
+    - name: Build static library
+      run: cmake --build build-static --parallel
+
+    - name: Build shared library
+      run: cmake --build build-shared --parallel
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2
+      with:
+        category: "/language:${{matrix.language}}"