llvm-x86_64-unknown-linux-gnu.yml

name: llvm-x86_64-unknown-linux-gnu

on:
  push:
    tags:
      - 'llvm-x86_64-unknown-linux-gnu-v*.*.*'
jobs:
  build-llvm:
    runs-on: ubuntu-latest
    container:
      image: messense/manylinux_2_28-cross:x86_64
    permissions:
      contents: write
    env:
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} 
    steps:
      - name: Generating Unique ID
        run: |
          BASE_NAME=$(echo "$GITHUB_REF" | sed 's|^refs/tags/||')
          BUILD_ID="${BASE_NAME}-$GITHUB_RUN_ID" 
          
          echo "BUILD_ID=$BUILD_ID" >> $GITHUB_ENV
          echo "BASE_NAME=$BASE_NAME" >> $GITHUB_ENV

          echo "Unique ID: $BUILD_ID"
          echo "Base name: $BASE_NAME"

      - name: Installing dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y build-essential cmake ninja-build python3 wget libz-dev binutils xz-utils gcc g++

          sudo apt-get remove -y llvm-16* clang-16* || true
          sudo rm -rf /usr/lib/llvm-16

      - name: Downloading LLVM project
        run: |
          wget https://github.com/llvm/llvm-project/releases/download/llvmorg-17.0.6/llvm-project-17.0.6.src.tar.xz

      - name: Unpacking LLVM project 
        run: |
          tar -xf llvm-project-17.0.6.src.tar.xz
          mv llvm-project-17.0.6.src llvm-project

      - name: Creating host-tools build directory 
        run: |
           mkdir -p host-build
          
      - name: Build host tools first
        run: |
          cmake ../llvm-project/llvm -G Ninja \
            -DCMAKE_BUILD_TYPE=Release \
            -DLLVM_ENABLE_PROJECTS="llvm" \
            -DLLVM_TARGETS_TO_BUILD="X86" \
            -DLLVM_BUILD_TESTS=OFF \
            -DLLVM_INCLUDE_TESTS=OFF \
            -DLLVM_INCLUDE_EXAMPLES=OFF \
            -DLLVM_INCLUDE_DOCS=OFF \
            -DCMAKE_INSTALL_PREFIX="/host-tools"

          ninja -j$(nproc) llvm-tblgen llvm-config
          ninja install
          
        working-directory: host-build

      - name: Creating cross-compilation build directory
        run: |
          mkdir -p llvm-build

      - name: Configure LLVM for cross-compilation to gnu
        run: |
          cmake ../llvm-project/llvm -G Ninja \
            -DCMAKE_BUILD_TYPE=MinSizeRel \
            -DCMAKE_C_COMPILER=x86_64-unknown-linux-gnu-gcc \
            -DCMAKE_CXX_COMPILER=x86_64-unknown-linux-gnu-g++ \
            -DCMAKE_SYSROOT=/usr/x86_64-unknown-linux-gnu/x86_64-unknown-linux-gnu/sysroot/ \
            -DLLVM_TABLEGEN=/host-tools/bin/llvm-tblgen \
            -DLLVM_ENABLE_PROJECTS="llvm" \
            -DLLVM_ENABLE_TERMINFO=OFF \
            -DLLVM_ENABLE_ZLIB=ON \
            -DLLVM_ENABLE_LIBXML2=OFF \
            -DCMAKE_INSTALL_PREFIX="dist" \
            -DLLVM_TARGETS_TO_BUILD=all \
            -DLLVM_BUILD_TESTS=OFF \
            -DLLVM_BUILD_EXAMPLES=OFF \
            -DLLVM_INCLUDE_TESTS=OFF \
            -DLLVM_INCLUDE_EXAMPLES=OFF \
            -DLLVM_INCLUDE_DOCS=OFF

        working-directory: llvm-build
        
      - name: Building LLVM
        run: |
          ninja -j$(nproc)

        working-directory: llvm-build
        
      - name: Installing LLVM
        run: |
          ninja install

        working-directory: llvm-build

      - name: Cleaning LLVM Binaries
        run: |
          find llvm-build/dist/bin -type f -executable ! -name "llvm-config" -delete
          
      - name: Preparing distribution files
        run: |
          mkdir -p tempDir/lib
          mkdir -p tempDir/bin  
          mkdir -p tempDir/include

          cp -r llvm-build/dist/lib/* tempDir/lib/
          cp -r llvm-build/dist/bin/* tempDir/bin/
          cp -r llvm-build/dist/include/* tempDir/include/

      - name: Packaging LLVM (LLVM Libraries, Binaries & Includes)
        run: |
          tar --format=pax -cJf llvm-x86_64-unknown-linux-gnu.tar.xz --exclude='*/*.cmake' --exclude='*/*.o' --exclude='*/*.d' lib bin include
        
        working-directory: tempDir

      - name: Releasing LLVM
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ env.BUILD_ID }}
          name: "llvm-x86_64-unknown-linux-gnu"
          body: |
            ## llvm-x86_64-unknown-linux-gnu
            
            LLVM precompiled for x86_64-unknown-linux-gnu host target triple.
            
            The LLVM backend has been precompiled specifically for linking to a system that follows the triple-target convention. 
            This precompilation is intended solely for building the Thrush Compiler. Both LLVM and Thrush maintain their ability to perform cross-compilation for multiple targets.

          files: |
            tempDir/llvm-x86_64-unknown-linux-gnu.tar.xz