add workflow

.gitea/workflows/build.yml

@@ -0,0 +1,57 @@
+name: Build Clang P2996
+on:
+  push:
+    branches:
+      - automated-release
+
+jobs:
+  build:
+    runs-on: self-hosted
+    container:
+      image: ubuntu:22.04
+
+    env:
+      INSTALL_PATH: ${{ github.workspace }}/install
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install dependencies
+        run: |
+          apt-get update
+          apt-get install -y \
+            cmake \
+            make \
+            python3 \
+            python3-pip \
+            zlib1g-dev \
+            build-essential
+          pip3 install PyYAML>=5.1
+
+      - name: Configure Clang
+        run: |
+          cmake -S llvm -B build \
+            -DLLVM_ENABLE_PROJECTS='clang;clang-tools-extra' \
+            -DLLVM_ENABLE_RUNTIMES='libcxx;libcxxabi;libunwind' \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DCMAKE_INSTALL_PREFIX=${INSTALL_PATH}
+
+      - name: Build Clang
+        run: |
+          cmake --build build --parallel=4
+
+      - name: Install
+        run: |
+          cmake --install build --prefix ${INSTALL_PATH}
+
+      - name: Package artifact
+        run: |
+          tar -czf clang-install.tar.gz -C ${INSTALL_PATH} .
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: clang-p2996
+          path: clang-p2996tar.gz
+