Add build script and github workflow

.github/workflows/build-llvm.yaml

@@ -0,0 +1,58 @@
+name: "Build LLVM"
+
+on:
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Git tag for the release.'
+        required: true
+        type: string
+
+jobs:
+  build_llvm:
+    name: Build LLVM
+    strategy:
+      matrix:
+        # os: [ubuntu-20.04, macos-11, windows-2019]
+        os: [ubuntu-20.04]
+    runs-on: ${{ matrix.os }}
+    permissions:
+      contents: write # for creating releases
+    container:
+      # Intentionally old ubuntu version with old glibc.
+      image: ubuntu:18.04
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+
+      # Install build dependencies.
+      - run: "apt update && apt install -y clang git wget build-essential python3 ninja-build"
+      # cmake from package manager is to old for the LLVM build.
+      - run: "wget https://github.com/Kitware/CMake/releases/download/v3.30.0-rc2/cmake-3.30.0-rc2-linux-x86_64.sh"
+      - run: "chmod +x cmake-*.sh"
+      - run: "./cmake-*.sh --skip-license --prefix=/usr"
+      # Build and package LLVM.
+      - run: "./build-llvm-libs.sh"
+      - uses: actions/upload-artifact@v3
+        with:
+          name: llvm-static-libs
+          path: llvm-static-libs.tar.gz
+      - name: create release
+        id: create-release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ inputs.tag }}
+          release_name: ${{ inputs.tag }}
+          draft: false
+          prerelease: true
+      - name: upload linux artifact
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+        with:
+          upload_url: ${{ steps.create-release.outputs.upload_url }}
+          asset_path: ./llvm-static-libs.tar.gz
+          asset_name: llvm-static-linux-amd64.tar.gz
+          asset_content_type: application/gzip

.gitignore

@@ -0,0 +1 @@
+build/

CMakeLists.txt

@@ -0,0 +1,46 @@
+cmake_minimum_required(VERSION 3.5)
+project(llvm-static)
+
+if(POLICY CMP0114)
+    cmake_policy(SET CMP0114 NEW)
+endif()
+
+# Avoid warning about DOWNLOAD_EXTRACT_TIMESTAMP in CMake 3.24:
+if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.24.0")
+  cmake_policy(SET CMP0135 NEW)
+endif()
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+# set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+set(CMAKE_BUILD_TYPE Release)
+
+include(ExternalProject)
+ExternalProject_Add(${LLVM_PROJECT_TARGET}
+    PREFIX ${LLVM_PROJECT_TARGET}
+    GIT_REPOSITORY https://github.com/llvm/llvm-project.git
+    GIT_TAG llvmorg-18.1.5
+    GIT_SHALLOW ON
+    SOURCE_SUBDIR llvm
+    CMAKE_ARGS
+        -G${CMAKE_GENERATOR}
+        -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
+        -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
+        -DCMAKE_C_COMPILER:FILEPATH=${CMAKE_C_COMPILER}
+        -DCMAKE_CXX_COMPILER:FILEPATH=${CMAKE_CXX_COMPILER}
+        -DCMAKE_C_COMPILER_LAUNCHER:FILEPATH=${CMAKE_C_COMPILER_LAUNCHER}
+        -DCMAKE_CXX_COMPILER_LAUNCHER:FILEPATH=${CMAKE_CXX_COMPILER_LAUNCHER}
+        -DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}
+        -DCMAKE_POSITION_INDEPENDENT_CODE=${CMAKE_POSITION_INDEPENDENT_CODE}
+        -DLLVM_ENABLE_PROJECTS=clang
+        -DLLVM_ENABLE_RTTI=ON
+        -DLLVM_ENABLE_PIC=ON
+        -DLLVM_TARGETS_TO_BUILD=X86
+        -DLLVM_BUILD_TOOLS=OFF
+        -DLLVM_BUILD_TESTS=OFF
+        -DLLVM_ENABLE_TERMINFO=OFF
+        -DLLVM_ENABLE_ZLIB=OFF
+        -DLLVM_ENABLE_ZSTD=OFF
+        -DLLVM_ENABLE_LIBXML2=OFF
+    BUILD_COMMAND ${CMAKE_COMMAND} --build <BINARY_DIR> --target clangTooling -j16
+)

README.md

@@ -1 +1,3 @@
-# llvm-static
+# LLVM Tooling
+
+This repository contains scripts to build static LLVM libraries which can be used to develop libclangTooling based tools. See the release page for downloadable archives.

build-llvm-libs.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+BUILD_DIR="$SCRIPT_DIR/build"
+LLVM_BUILD_DIR="$BUILD_DIR/external.llvm-project"
+
+cd "$SCRIPT_DIR"
+mkdir -p build
+# cmake -B build -GNinja .
+# cmake --build build
+mkdir -p $LLVM_BUILD_DIR/include
+touch $LLVM_BUILD_DIR/include/clang.h
+
+# Pack everything we need into a tar archive.
+# We only need the header files, static libraries and add
+# a CMake file that makes it easy to link libclangTooling.
+cp $SCRIPT_DIR/cmake/CMakeLists.txt $LLVM_BUILD_DIR
+cd $LLVM_BUILD_DIR
+tar -czvf "$SCRIPT_DIR/llvm-static-libs.tar.gz" include/ lib/*.a CMakeLists.txt

cmake/CMakeLists.txt

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+# Static libraries that are needed when using libclangTooling
+set(CLANG_TOOLING_DEPS
+    clangFormat
+    clangToolingInclusions
+    clangFrontend
+    clangDriver
+    clangParse
+    clangSerialization
+    clangSema
+    clangAPINotes
+    clangEdit
+    clangAnalysis
+    clangASTMatchers
+    clangAST
+    clangSupport
+    clangToolingCore
+    clangRewrite
+    clangLex
+    clangBasic
+    # Order as reported by llvm-config --libs --link-static
+    LLVMWindowsDriver
+    LLVMOption
+    LLVMFrontendOpenMP
+    LLVMFrontendOffloading
+    LLVMScalarOpts
+    LLVMTransformUtils
+    LLVMAnalysis
+    LLVMProfileData
+    LLVMDebugInfoDWARF
+    LLVMObject
+    LLVMTextAPI
+    LLVMMCParser
+    LLVMIRReader
+    LLVMAsmParser
+    LLVMMC
+    LLVMBitReader
+    LLVMCore
+    LLVMRemarks
+    LLVMBitstreamReader
+    LLVMBinaryFormat
+    LLVMTargetParser
+    LLVMSupport
+    LLVMDemangle)
+
+foreach(lib ${CLANG_TOOLING_DEPS})
+    add_library(${lib} STATIC IMPORTED)
+    set_property(TARGET ${lib} PROPERTY IMPORTED_LOCATION "${CMAKE_CURRENT_SOURCE_DIR}/lib/lib${lib}.a")
+endforeach(lib)
+
+# Exported clangTooling target.
+add_library(clangTooling STATIC IMPORTED GLOBAL)
+set_property(TARGET clangTooling PROPERTY IMPORTED_LOCATION "${CMAKE_CURRENT_SOURCE_DIR}/lib/libclangTooling.a")
+target_include_directories(clangTooling INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/include)
+set_target_properties(clangTooling PROPERTIES INTERFACE_LINK_LIBRARIES "${CLANG_TOOLING_DEPS}")