how_embedding_LLVM_to_your_project.md

如何将 LLVM 嵌套到你的项目中去

安装llvm

cmake ../llvm/ -DCMAKE_BUILD_TYPE=Debug -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_BUILD_TESTS=False 

本项目使用 cmake 构建项目

IDE 为 clion

CMakeLists.txt

cmake_minimum_required(VERSION 3.9)
project(clang_demo)

find_package(LLVM REQUIRED CONFIG)

message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")

set(CMAKE_CXX_STANDARD 17)

# Set your project compile flags.
# E.g. if using the C++ header files
# you will need to enable C++11 support
# for your compiler.

include_directories(${LLVM_INCLUDE_DIRS})
add_definitions(${LLVM_DEFINITIONS})

add_executable(clang_demo main.cpp toy.cpp hello_world.cpp)
# Find the libraries that correspond to the LLVM components
# that we wish to use
llvm_map_components_to_libnames(llvm_libs support core irreader)

# Link against LLVM libraries
target_link_libraries(clang_demo ${llvm_libs})

不使用 cmake 构建项目，可执行以下命令

clang++ -g hello_world.cpp `llvm-config --cxxflags --ldflags --system-libs --libs core` -o hello_world

获取 LLVM 配置信息

llvm-config --cxxflags --ldflags --system-libs --libs core