ci: add Dependabot auto-merge workflow

.github/workflows/dependabot-auto-merge.yml

@@ -0,0 +1,24 @@
+name: Dependabot auto-merge
+
+on:
+  pull_request_target:
+    branches:
+      - master
+      - main
+    types:
+      - opened
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  enableAutoMerge:
+    runs-on: ubuntu-latest
+    if: github.event.pull_request.user.login == 'dependabot[bot]'
+    steps:
+      - name: Enable auto-merge for Dependabot PRs
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{ github.event.pull_request.html_url }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

src/AMBuilder

@@ -22,6 +22,11 @@ for sdk_name in Extension.sdks:
 
     Extension.AddCDetour(binary)
 
+    # Silence fatal errors on unrecognized Clang warning flags from CDetour
+    if cxx.family in ['gcc', 'clang']:
+        binary.compiler.cflags += ['-Wno-unknown-warning-option']
+        binary.compiler.cxxflags += ['-Wno-unknown-warning-option']
+
     binary.compiler.cxxincludes += [
       os.path.join(sdk['path'], 'game', 'server'),
     ]