构建LLVm

KN的LLVM通过Kotlin项目自己写的脚本构建

• 这脚本主要是在组装cmake和ninja命令参数，确定参数后后续增量构建直接用命令
• 默认是2阶段
• build-targets 不传是打所有的组件，传是只打 distribution-components 里声明的组件更快产物更小
• zsh变量的值就算有空格也认为是一个字符串，需要 var=(a b c) 使用var时才会认为是传入了多个参数

修改构建脚本

• 加上 -DCMAKE_EXPORT_COMPILE_COMMANDS=ON 选项，构建出来的版本中带 compile_commands.json，方便vscode做代码导航
• 多xcode环境下稳定取得 DEVELOPER_DIR 指向的sysroot ```diff def detect_xcode_sdk_path(): “”” Get an absolute path to macOS SDK. “””
  • return subprocess.check_output([‘xcrun’, ‘–show-sdk-path’],
  • return subprocess.check_output([‘xcrun’, ‘–sdk’, ‘macosx’, ‘–show-sdk-path’], universal_newlines=True).rstrip()

  ```

master-llvm12-backup

• 分支地址：https://gitcode.com/openharmony/third_party_llvm-project/tree/master-llvm12-backup
• 使用 KN 2.0 的脚本

Mac Arm

LLVM_FOLDER=/Users/hl/git/llvm/oh12
git clone http://gitcode.com/openharmony/third_party_llvm-project $LLVM_FOLDER

brew install ninja cmake wget ccache
# cmake 4.2.1 ninja 1.13.2 实测成功

cd kotlin-native/tools/llvm_builder

export DEVELOPER_DIR=/Applications/Xcode-14.3.1.app/Contents/Developer/
DISTRIBUTION_COMPONENTS=(clang libclang lld llvm-cov llvm-profdata llvm-ar clang-resource-headers)
python3 package.py \
  --distribution-components $DISTRIBUTION_COMPONENTS \
  --llvm-sources $LLVM_FOLDER \
  --save-temporary-files # --pack

# 增量构建
cd llvm-stage-2-build
ninja install-distribution

# 打发布产物
# python脚本传 --pack

py脚本的实际编译命令

Force-creating directory /Users/hl/git/llvm/oh12/llvm-stage-1
Force-creating directory /Users/hl/git/llvm/oh12/llvm-stage-1-build

/Users/hl/git/llvm/oh12/llvm-stage-1-build
Running command: cmake -G Ninja
-DCMAKE_BUILD_TYPE=Release
-DCMAKE_EXPORT_COMPILE_COMMANDS=ON
-DLLVM_ENABLE_ASSERTIONS=OFF
-DLLVM_ENABLE_TERMINFO=OFF
-DLLVM_INCLUDE_GO_TESTS=OFF
-DLLVM_ENABLE_Z3_SOLVER=OFF
-DCOMPILER_RT_BUILD_BUILTINS=ON
-DLLVM_ENABLE_THREADS=ON
-DLLVM_OPTIMIZED_TABLEGEN=ON
-DLLVM_ENABLE_IDE=OFF
-DLLVM_BUILD_UTILS=ON
-DLLVM_INSTALL_UTILS=ON
-DLLVM_ENABLE_LIBCXX=ON
-DCMAKE_OSX_DEPLOYMENT_TARGET=11.2
-DCMAKE_OSX_SYSROOT=/Applications/Xcode-14.3.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.3.sdk
-DCOMPILER_RT_BUILD_CRT=OFF
-DCOMPILER_RT_BUILD_LIBFUZZER=OFF
-DCOMPILER_RT_BUILD_SANITIZERS=OFF
-DCOMPILER_RT_BUILD_XRAY=OFF
-DCOMPILER_RT_ENABLE_IOS=OFF
-DCOMPILER_RT_ENABLE_WATCHOS=OFF
-DCOMPILER_RT_ENABLE_TVOS=OFF
-DCMAKE_INSTALL_PREFIX=/Users/hl/git/llvm/oh12/llvm-stage-1
-DLLVM_TARGETS_TO_BUILD=Native
'-DLLVM_ENABLE_PROJECTS=clang;lld;libcxx;libcxxabi;compiler-rt'
-DLLVM_BUILD_LLVM_DYLIB=OFF
-DLLVM_LINK_LLVM_DYLIB=OFF
/Users/hl/git/llvm/oh12/llvm

/Users/hl/git/llvm/oh12/llvm-stage-1-build
Running command: ninja install

Force-creating directory /Users/hl/git/llvm/oh12/llvm-stage-2-build

/Users/hl/git/llvm/oh12/llvm-stage-2-build
Running command: 
cmake -G Ninja
-DCMAKE_BUILD_TYPE=Release
-DCMAKE_EXPORT_COMPILE_COMMANDS=ON
-DLLVM_ENABLE_ASSERTIONS=OFF
-DLLVM_ENABLE_TERMINFO=OFF
-DLLVM_INCLUDE_GO_TESTS=OFF
-DLLVM_ENABLE_Z3_SOLVER=OFF
-DCOMPILER_RT_BUILD_BUILTINS=ON
-DLLVM_ENABLE_THREADS=ON
-DLLVM_OPTIMIZED_TABLEGEN=ON
-DLLVM_ENABLE_IDE=OFF
-DLLVM_BUILD_UTILS=ON
-DLLVM_INSTALL_UTILS=ON
'-DLLVM_DISTRIBUTION_COMPONENTS=clang;libclang;lld;llvm-cov;llvm-profdata;llvm-ar;clang-resource-headers'
-DCLANG_LINKS_TO_CREATE=clang++
'-DLLD_SYMLINKS_TO_CREATE=ld.lld;wasm-ld'
-DLLVM_ENABLE_LIBCXX=ON
-DCMAKE_OSX_DEPLOYMENT_TARGET=11.2
-DCMAKE_OSX_SYSROOT=/Applications/Xcode-14.3.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.3.sdk
-DLIBCXX_USE_COMPILER_RT=ON
-DCMAKE_INSTALL_PREFIX=/Users/hl/git/llvm/oh12/llvm-distribution
'-DLLVM_ENABLE_PROJECTS=clang;lld;libcxx;libcxxabi;compiler-rt'
-DCMAKE_C_COMPILER=/Users/hl/git/llvm/oh12/llvm-stage-1/bin/clang
-DCMAKE_CXX_COMPILER=/Users/hl/git/llvm/oh12/llvm-stage-1/bin/clang++
-DCMAKE_AR=/Users/hl/git/llvm/oh12/llvm-stage-1/bin/llvm-ar
-DCMAKE_C_FLAGS=
-DCMAKE_CXX_FLAGS=-stdlib=libc++
-DCMAKE_EXE_LINKER_FLAGS=-stdlib=libc++
-DCMAKE_MODULE_LINKER_FLAGS=-stdlib=libc++
-DCMAKE_SHARED_LINKER_FLAGS=-stdlib=libc++
-DLLVM_BUILD_LLVM_DYLIB=OFF
-DLLVM_LINK_LLVM_DYLIB=OFF
/Users/hl/git/llvm/oh12/llvm

/Users/hl/git/llvm/oh12/llvm-stage-2-build
Running command: ninja install

编带debug信息版本时在二阶段cmake修改配置

-DCMAKE_BUILD_TYPE=RelWithDebInfo 
-DLLVM_ENABLE_ASSERTIONS=ON

Linux

LLVM_FOLDER=/Users/hl/git/llvm/oh12
git clone http://gitcode.com/openharmony/third_party_llvm-project $LLVM_FOLDER

cd kotlin-native/tools/llvm_builder/images/linux/
docker build --platform linux/amd64 -t kotlin-llvm-builder --file ./Dockerfile .

LLVM_FOLDER=/Users/hl/git/llvm/oh19
DISTRIBUTION_COMPONENTS=(clang libclang lld llvm-cov llvm-profdata llvm-ar clang-resource-headers)
docker run --platform linux/amd64 --rm -it -v .:/output -v $LLVM_FOLDER:/llvm kotlin-llvm-builder --llvm-sources /llvm --install-path /output/llvm-12.0.1-x86_64-linux --distribution-components $DISTRIBUTION_COMPONENTS --save-temporary-files # --pack

llvm-19.1.7

cmake版本高的话会遇到cmake < 3.5不再被支持，有两个声明cmake最低3.1的，bump到3.5

LLVM_FOLDER=/Users/hl/git/llvm/oh19
export DEVELOPER_DIR=/Applications/Xcode-16.4.app/Contents/Developer/
# 其他的同12