linux手动编译llvm/clang

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  • centos 7 安装前置依赖

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    sudo yum install git python-devel libffi-devel graphviz-devel elfutils-libelf-devel \
      readline-devel libedit-devel libxml2-devel protobuf-devel gtext-devel doxygen swig
    sudo yum install -y centos-release-scl scl-utils-build
    sudo yum install -y devtoolset-9 
    source /opt/rh/devtoolset-9/enable
    export CC=/opt/rh/devtoolset-9/root/bin/gcc
    export CXX=/opt/rh/devtoolset-9/root/bin/g++

    wget https://github.com/Kitware/CMake/releases/download/v3.20.0/cmake-3.20.0.tar.gz
    tar xzvf cmake-3.20.0.tar.gz
    cd cmake-3.20.0
    ./bootstrap --prefix=/usr/local
    make -j8
    sudo make install

  • ubuntu 18.04+ 安装前置依赖

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    sudo apt install git build-essential cmake python3-dev libncurses5-dev libxml2-dev \
      libedit-dev swig doxygen graphviz xz-utils

  • 下载&编译

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    git clone git@github.com:llvm/llvm-project.git -b release/11.x
    cd llvm-project && mkdir build && cd build
    cmake -G "Unix Makefiles" ../llvm -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/local \
      -DLLVM_ENABLE_PROJECTS="clang;" -DLLVM_TARGETS_TO_BUILD="AArch64;X86;"
    make -j8
    sudo make install

如果只要编译clang，在cmake命令添加定义 -DLLVM_ENABLE_PROJECTS=clang;
LLVM_ENABLE_PROJECTS可用的项目有
clang;clang-tools-extra;compiler-rt;debuginfo-tests;libc;libclc;libcxx;libcxxabi;libunwind;lld;lldb;mlir;openmp;parallel-libs;polly;pstl

默认会编译所有平台，可以通过LLVM_TARGETS_TO_BUILD指定平台，可用平台有AArch64, AMDGPU, ARM, BPF, Hexagon, Mips, MSP430, NVPTX, PowerPC, Sparc, SystemZ, X86, XCore