build.yml

name: Build LLVM/Clang

on:
  workflow_dispatch:
    inputs:
      version:
        description: 'Select version to build'
        required: true
        default: '16.0.6'
        type: choice
        options:
          - '16.0.6'
          - '17.0.6'
          - '18.1.8'

jobs:
  build:
    name: Build LLVM/Clang
    runs-on: ubuntu-24.04
    defaults:
      run:
        shell: bash

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set version-specific variables
        run: |
          if [[ "${{ github.event.inputs.version }}" =~ ^16\..* ]]; then
            echo "branch=llvmorg-${{ github.event.inputs.version }}" >> $GITHUB_ENV
            echo "version_major=16" >> $GITHUB_ENV
          elif [[ "${{ github.event.inputs.version }}" =~ ^17\..* ]]; then
            echo "branch=llvmorg-${{ github.event.inputs.version }}" >> $GITHUB_ENV
            echo "version_major=17" >> $GITHUB_ENV
          elif [[ "${{ github.event.inputs.version }}" =~ ^18\..* ]]; then
            echo "branch=llvmorg-${{ github.event.inputs.version }}" >> $GITHUB_ENV
            echo "version_major=18" >> $GITHUB_ENV
          fi
          echo "version=${{ github.event.inputs.version }}" >> $GITHUB_ENV

      - name: CentOS Rootfs
        run: |
          wget -q https://github.com/sbwml/kernel-latest-centos/releases/download/rootfs/rootfs.tar.xz
          wget -q https://github.com/sbwml/redhat-llvm-project/releases/download/16.0.6/clang-16.0.6-x86_64-redhat-linux.tar.xz
          tar xf rootfs.tar.xz && rm -f rootfs.tar.xz
          tar xf clang-16.0.6-x86_64-redhat-linux.tar.xz && rm -f clang-16.0.6-x86_64-redhat-linux.tar.xz
          echo "rootfs=$(pwd)/rootfs" >> "$GITHUB_ENV"
          sudo mount -o bind /dev rootfs/dev
          sudo mount -t proc /proc rootfs/proc
          sudo mount -t sysfs /sys rootfs/proc
          # copy source to rootfs
          sudo cp -a build.sh rootfs
          sudo cp -a cmake rootfs
          sudo cp -a src/* rootfs
          sudo cp -a tools rootfs/opt
          sudo mv clang-16.0.6-x86_64-redhat-linux rootfs/opt/clang

      - name: Checkout LLVM ${{ env.version }}
        uses: actions/checkout@v4
        with:
          repository: llvm/llvm-project
          ref: ${{ env.branch }}
          path: llvm-project

      - name: Patch llvm-project
        run: |
          if [[ "${{ env.version_major }}" == 16 ]]; then
            git -C llvm-project apply $GITHUB_WORKSPACE/patches/llvm-16-add-lld-install-targets.patch
            git -C llvm-project apply $GITHUB_WORKSPACE/patches/llvm-16-add-llvm-name-prefix-to-llc-lli-opt-tools.patch
            git -C llvm-project apply $GITHUB_WORKSPACE/patches/llvm-16-force-disable-clang-ast-introspection.patch
          elif [[ "${{ env.version_major }}" == 17 ]]; then
            git -C llvm-project apply $GITHUB_WORKSPACE/patches/llvm-17-add-lld-install-targets.patch
            git -C llvm-project apply $GITHUB_WORKSPACE/patches/llvm-17-add-llvm-name-prefix-to-llc-lli-opt-tools.patch
            git -C llvm-project apply $GITHUB_WORKSPACE/patches/llvm-17-force-disable-clang-ast-introspection.patch
          elif [[ "${{ env.version_major }}" == 18 ]]; then
            git -C llvm-project apply $GITHUB_WORKSPACE/patches/llvm-18-add-lld-install-targets.patch
            git -C llvm-project apply $GITHUB_WORKSPACE/patches/llvm-18-add-llvm-name-prefix-to-llc-lli-opt-tools.patch
            git -C llvm-project apply $GITHUB_WORKSPACE/patches/llvm-18-force-disable-clang-ast-introspection.patch
          fi
          sudo mv llvm-project ${{ env.rootfs }}

      - name: Build System Setup
        run: |
          sudo chroot ${{ env.rootfs }} /bin/bash /build.sh setup

      - name: Build Dependent
        run: |
          sudo chroot ${{ env.rootfs }} /bin/bash /build.sh dll

      - name: Build LLVM
        run: |
          sudo chroot ${{ env.rootfs }} /bin/bash /build.sh llvm ${{ env.version }}

      - name: Install LLVM
        run: |
          # llvm
          sudo mv ${{ env.rootfs }}/llvm-install llvm-install
          sudo cp -a ${{ env.rootfs }}/llvm-build/lib/LLVMgold.so llvm-install/lib
          sudo mkdir llvm-install/lib/bfd-plugins
          sudo ln -sf ../LLVMgold.so llvm-install/lib/bfd-plugins/LLVMgold.so
          sudo ln -sf llvm-llc llvm-install/bin/llc
          sudo ln -sf llvm-opt llvm-install/bin/opt
          sudo rm -rf llvm-install/bin/{clang,clang++,clang-cl,clang-cpp}
          sudo ln -sf clang-${{ env.version_major }} llvm-install/bin/clang
          sudo ln -sf clang-${{ env.version_major }} llvm-install/bin/clang++
          sudo ln -sf clang-${{ env.version_major }} llvm-install/bin/clang-cl
          sudo ln -sf clang-${{ env.version_major }} llvm-install/bin/clang-cpp
          # libs
          sudo cp -a ${{ env.rootfs }}/lib-install/* llvm-install/lib
          sudo chown -R runner.runner llvm-install

      - name: Package LLVM
        run: |
          mv llvm-install clang-${{ env.version }}-x86_64-redhat-linux
          sudo chown -R root:root clang-${{ env.version }}-x86_64-redhat-linux
          sudo tar -Jcf clang-${{ env.version }}-x86_64-redhat-linux.tar.xz clang-${{ env.version }}-x86_64-redhat-linux

      - name: Create release
        continue-on-error: true
        uses: ncipollo/release-action@v1.14.0
        with:
          name: clang-${{ env.version }}
          allowUpdates: true
          tag: ${{ env.version }}
          commit: main
          replacesArtifacts: true
          token: ${{ secrets.GITHUB_TOKEN }}
          artifacts: clang-${{ env.version }}-x86_64-redhat-linux.tar.xz