开源编译器LLVM-源码编译

1.编译参考

详细的cmake编译选项,参考:Building LLVM with CMake — LLVM 18.0.0git documentation

2.编译脚本

utils.bash

build-llvm.sh 依赖 utils.bash 脚本

#!/usr/bin/env bash

COLOR_FATAL=$'33[41;38m'
COLOR_ERROR=$'33[1;31m'
COLOR_WARN=$'33[1;33m'
COLOR_NOTE=$'33[1;32m'
COLOR_INFO=$'33[1;34m'
COLOR_TRACE=$'33[0;37m'
COLOR_RESET=$'33[0m'

log_colored () {
  if [ -t 1 ]; then
    echo -n $1
  fi
  shift
  echo -e "[$PROG_NAME] $*"
  if [ -t 1 ]; then
    echo -e -n $COLOR_RESET
  fi
}

log_fatal () {
  log_colored $COLOR_FATAL $*
  exit -1
}

log_error () {
  log_colored $COLOR_ERROR $*
}

log_warn () {
  log_colored $COLOR_WARN $*
}

log_note () {
  log_colored $COLOR_NOTE $*
}

log_info () {
  log_colored $COLOR_INFO $*
}

log_trace () {
  log_colored $COLOR_TRACE $*
}

prog_log_fatal () {
  log_fatal  "|FATAL| $*"
}

prog_log_error () {
  log_error "|ERROR| $*"
}

prog_log_warn () {
  log_warn "|WARNING| $*"
}

prog_log_note () {
  log_note "|NOTE| $*"
}

prog_log_info () {
  log_info "|INFO| $*"
}

prog_log_trace () {
  log_trace "|TRACE| $*"
}

join_by () {
  # bash method like python ",".join([a, b, c,])
  # @ref Stack Overflow 1527049 how-can-i-join-elements-of-an-array-in-bash
  local d=${1-} f=${2-}
  if shift 2; then
    printf %s "$f" "${@/#/$d}"
  fi
}

version_le () {
  # compare v1:a.b.c and v2:x.y.z
  # check v1 <= v2, return 0 for true, 1 for false
  local v1=$1
  local v2=$2
  [ "$v1" = "$(echo -e "$v1n$v2" | sort -V | head -n1)" ]
}

download_pkg () {
  local _url=$1
  local _filename=$(basename $_url)
  local _download_dir=$2
  local _package_verify=$(wget -c ${_url}.md5sum --timeout=10 -qO-)
  # ugly workaround for cntoolkit md5sum naming bug
  local _package_verify_fixname=$(paste <(awk '{print $1}' <<< "$_package_verify") <(echo "$_filename"))

  pushd ${_download_dir} >/dev/null
    ## Download package in either condition:
    #### 1. File not found
    #### 2. File.md5sum not found
    #### 3. File and md5sum does not match
    if [ ! -f "${_filename}" ] 
      || [ -z "${_package_verify}" ] 
      || [ -n "$(echo ${_package_verify_fixname} | md5sum --check --quiet || :)" ]; then
      rm -rf ${_filename}
      wget --progress=bar:force:noscroll -c ${_url} --timeout=100
    else
      prog_log_trace "download_pkg hit cache for ${_filename}"
    fi
  popd >/dev/null
}

get_json_val_from_str () {
  # def get_json_val (json_file, key, default_value=None)
  # parse json file and fetch value by key name
  # XXX Does not support nested object yet
  json_val='' # return value
  local input=$1
  local key=$2
  local match_pattern=""${key}".*"
  # json may contains newline and spaces
  # TODO avoid deleting spaces inside value string
  local matched_str=`echo ${input} | sed -z 's/n//g' | sed -r 's/ +//g' | grep -E -o ${match_pattern} | sed -r "s/^"${key}" *://"`

  # parse formats below:
  #  | "(?key)":{(?object)}
  #  | "(?key)":[(?array)]
  #  | "(?key)":(true | false | null)
  #  | "(?key)":(?number)
  #  | "(?key)":"(?string)"
  local next_char=${matched_str:0:1}
  case $next_char in
    '{')
      # value may be object
      # TODO match nested braces
      json_val=$(cut -d '{' -f 2 <<< ${matched_str} | cut -d '}' -f 1)
      ;;
    '[')
      # value may be array
      # TODO match nested brackets
      json_val=$(cut -d '[' -f 2 <<< ${matched_str} | cut -d ']' -f 1)
      ;;
    '"')
      json_val=$(sed -r 's/"([^"]+)".*/1/' <<< ${matched_str})
      ;;
    't' | 'f' | 'n')
      json_val=$(sed -r 's/^(true|false|null).*/1/' <<< ${matched_str})
      ;;
    [-.0-9])
      # TODO validate number
      json_val=$(sed -r 's/([-.0-9]+).*/1/' <<< ${matched_str})
      ;;
    *)
      ;;
  esac
  # | cut -d '{' -f 2 | cut -d '}' -f 1`
  if [ -z "${json_val}" ] && [ -n "$3" ]; then
    # return default value (if set)
    json_val=$3
  fi
  echo ${json_val};
}

get_json_val () {
  get_json_val_from_str "`cat $1`" $2 $3
}


common_extract () {
  local file_ext=${1##*.}
  local overwrite=$3
  local write_flag=
  mkdir -vp $2
  pushd $2 >/dev/null
    case ${file_ext} in
      rpm)
        [ -n "${overwrite}" ] && write_flag="-u"
        [ -n "${BUILD_VERBOSE}" ] && local ex_flag="-v"
        rpm2cpio $1 | cpio ${write_flag} -di $ex_flag
        ;;
      deb)
        [ -n "${overwrite}" ] && write_flag="--force-overwrite"
        [ -n "${BUILD_VERBOSE}" ] && local dpkg_ex="-X"
        dpkg ${dpkg_ex:--x} ${write_flag} $1 ./
        ;;
      gz)
        write_flag="--keep-newer-files"
        [ -n "${overwrite}" ] && write_flag="--overwrite"
        [ -n "${BUILD_VERBOSE}" ] && local ex_flag="-v"
        #  --no-same-owner for docker rootless
        tar ${write_flag} --no-same-owner -zxf $ex_flag $1
        ;;
      xz)
        write_flag="--keep-newer-files"
        [ -n "${overwrite}" ] && write_flag="--overwrite"
        [ -n "${BUILD_VERBOSE}" ] && local ex_flag="-v"
        tar ${write_flag} --no-same-owner -Jxf $ex_flag $1
        ;;
      bz2)
        write_flag="--keep-newer-files"
        [ -n "${overwrite}" ] && write_flag="--overwrite"
        [ -n "${BUILD_VERBOSE}" ] && local ex_flag="-v"
        tar ${write_flag} --no-same-owner -jxf $ex_flag $1
        ;;
      *)
        prog_log_fatal "Unknown file extension ${file_ext}, cannot extract this"
    esac
  popd >/dev/null
}

select_arch () {
  local arch=$1
  arch_name=''
  case $arch in
    x86_64)
      arch_name="amd64"
      ;;
    aarch64)
      arch_name="arm64"
      ;;
    *)
      echo 'unknown arch name'
  esac
  echo ${arch_name}
}

workaround_cmake_3_5_pkg_name () {
  # workaround for cmake 3.5, which does not support `CPACK_DEBIAN_<COMPONENT>_FILE_NAME` well
  local build_dir=$1
  local component=$2
  local component_lower=$(tr '[:upper:]' '[:lower:]' <<< $component)
  cmake3 --version 2>/dev/null && CMAKE=${CMAKE:-cmake3} || CMAKE=${CMAKE:-cmake}
  local cmake_minor_version=`${CMAKE} --version | head -n1 | cut -d '.' -f2`
  local cpack_debian_package_name=`sed -n "s@SET(CPACK_DEBIAN_${component}_FILE_NAME *"(.*)")@1@p" $build_dir/CPackConfig.cmake`
  local cpack_rpm_package_name=`sed -n "s@SET(CPACK_RPM_${component}_FILE_NAME *"(.*)")@1@p" $build_dir/CPackConfig.cmake`
  local package_name=`sed -n "s@SET(CPACK_PACKAGE_NAME *"(.*)")@1@p" $build_dir/CPackConfig.cmake`
  local package_vesion=`sed -n "s@SET(CPACK_PACKAGE_VERSION *"(.*)")@1@p" $build_dir/CPackConfig.cmake`
  echo $cmake_minor_version
  echo $cpack_debian_package_name
  if [ "${cmake_minor_version}" -lt "6" ]; then
    if [ -d $build_dir/_CPack_Packages/Linux/DEB/ ]; then
      for files in $build_dir/_CPack_Packages/Linux/DEB/$package_name-$package_vesion-Linux-$component_lower.deb; do
        if [ ! -f "$files" ]; then break; fi
        mv $files `dirname $files`/${cpack_debian_package_name}
      done
      for files in $build_dir/$package_name-$package_vesion-Linux-$component_lower.deb; do
        if [ ! -f "$files" ]; then break; fi
        mv $files `dirname $files`/${cpack_debian_package_name}
      done
    fi
    if [ -d $build_dir/_CPack_Packages/Linux/RPM/RPMS ]; then
      for files in $build_dir/_CPack_Packages/Linux/RPM/RPMS/$package_name-$package_vesion-Linux-$component_lower.rpm; do
        if [ ! -f "$files" ]; then break; fi
        mv $files `dirname $files`/${cpack_rpm_package_name}
      done
      for files in $build_dir/$package_name-$package_vesion-Linux-$component_lower.rpm; do
        if [ ! -f "$files" ]; then break; fi
        mv $files `dirname $files`/${cpack_rpm_package_name}
      done
    fi
  fi
}

build-llvm.sh

#! /usr/bin/env bash
set -e
# import common method like `download_pkg`, `get_json_val`, `common_extract`, etc
. ./utils.bash
PROG_NAME=$(basename $0)  # current script filename, DO NOT EDIT

SCRIPT_DIR=$( cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
prog_log_info "SCRIPT_DIR=${SCRIPT_DIR}"

BUILD_PATH=${SCRIPT_DIR}/build
CMAKE=cmake

export BUILD_MODE=${BUILD_MODE:-Release} # release/debug
export BUILD_JOBS="${BUILD_JOBS:-16}" # concurrent build jobs
export BUILD_TARGET="${BUILD_TARGET:-cuda}" # concurrent build jobs

# install path
LLVM_INSTALL_PATH=${SCRIPT_DIR}/install


#####################################
## usage and command line parsing  ##
#####################################

# setup short options, follow alphabetical order
short_args=(
  h   # help
  d   # debug
  j:  # jobs
  t:  # target
)
# setup long options, follow alphabetical order
long_args=(
  debug
  help
  jobs:
  target:
)

usage () {
    echo "USAGE: ./build.sh <options>"
    echo
    echo "OPTIONS:"
    echo "      -h, --help                  Print usage."
    echo "      -d, --debug                 Build with debug mode"
    echo "      -j N, --jobs=N              Build for N parallel jobs."
    echo "      -t cuda, --target=cuda      Build target, default cuda (cuda or rocm)."
    echo
}

_short_args_joined=$(join_by , ${short_args[@]})
_long_args_joined=$(join_by , ${long_args[@]})

# parse arguments and setup internal env
_cmdline_args=$(getopt -o $_short_args_joined --long $_long_args_joined -n $PROG_NAME -- "$@" || usage -1)
eval set -- "$_cmdline_args"

if [ $# != 0 ]; then
  while true; do
    case "$1" in
      -h | --help)
          usage
          exit 0
          ;;
      -d | --debug)
          shift
          export BUILD_MODE="Debug"
          prog_log_note "Using debug build mode"
          ;;
      -j | --jobs)
        shift
        export BUILD_JOBS=$1
        shift
        ;;
      -t | --target)
        shift
        export BUILD_TARGET=$1
        shift
        ;;
      --)
        shift
        if [ $# -gt 0 ]; then
          prog_log_warn "ignore '--', command line args meaning has been changed, check README.md for more details"
          sleep 1 # I hope user will see it
        fi
        ;;
      *)
        if [ $# -eq 0 ]; then
          break
        fi
        _cmdline_args=$(getopt -o $_short_args_joined --long $_long_args_joined -n $PROG_NAME -- "$@" || usage -1)
        eval set -- "$_cmdline_args"
        ;;
    esac
  done
fi

prog_log_info "BUILD_TARGET=${BUILD_TARGET}"
prog_log_info "BUILD_MODE=${BUILD_MODE}"
prog_log_info "BUILD_JOBS=${BUILD_JOBS}"

if [ ! -d "$BUILD_PATH" ]; then
  mkdir "$BUILD_PATH"
fi

rm -rf ${BUILD_PATH}/*
rm -fr ${LLVM_INSTALL_PATH}/*

# compile nvidia platform
build_cuda() {
  pushd ${BUILD_PATH} > /dev/null
      ${CMAKE} ../llvm 
          -DCMAKE_BUILD_TYPE=${BUILD_MODE} 
          -DCMAKE_INSTALL_PREFIX=${LLVM_INSTALL_PATH} 
          -DLLVM_ENABLE_ASSERTIONS=1 
          -DLLVM_TARGETS_TO_BUILD="NVPTX;X86" 
          -DLLVM_ENABLE_PROJECTS="llvm;clang;lld;lldb" 
          -DLLVM_ENABLE_RUNTIMES="compiler-rt" 
          -DLLVM_USE_LINKER=lld 
          -DLLVM_ENABLE_RTTI=ON 
          -DLLVM_ENABLE_ZSTD=ON 
          -DLLVM_ENABLE_ZLIB=ON 
          -DLLVM_ENABLE_FFI=ON 
          -DLLVM_CCACHE_BUILD=ON 
          -DLLVM_ENABLE_EH=ON 
          -DLLVM_USE_LINKER=gold
      make -j ${BUILD_JOBS}; make install
  popd > /dev/null
}

# compile amd platform
build_rocm() {
  pushd ${BUILD_PATH} > /dev/null
      ${CMAKE} ../llvm 
          -DCMAKE_BUILD_TYPE=${BUILD_MODE} 
          -DCMAKE_INSTALL_PREFIX=${LLVM_INSTALL_PATH} 
          -DLLVM_ENABLE_ASSERTIONS=1 
          -DLLVM_TARGETS_TO_BUILD="AMDGPU;X86" 
          -DLLVM_ENABLE_PROJECTS="llvm;clang;lld;lldb" 
          -DLLVM_ENABLE_RUNTIMES="compiler-rt" 
          -DLLVM_USE_LINKER=lld 
          -DLLVM_ENABLE_RTTI=ON 
          -DLLVM_ENABLE_ZSTD=ON 
          -DLLVM_ENABLE_ZLIB=ON 
          -DLLVM_ENABLE_WARNINGS=ON 
          -DLLVM_ENABLE_FFI=ON 
          -DLLVM_ENABLE_PIC=ON 
          -DLLVM_CCACHE_BUILD=ON 
          -DLLVM_ENABLE_EH=ON 
          -DLLVM_USE_LINKER=gold
      make -j ${BUILD_JOBS}; make install
  popd > /dev/null
}

if [ "${BUILD_TARGET}"x  = "cuda"x ]
then
  build_cuda
elif [  "${BUILD_TARGET}"x  = "rocm"x  ]
then
  build_rocm
else
  prog_log_error "UnRecognized target ${BUILD_TARGET}..."
  usage
fi

3.编译nvidia平台

拉取代码

git clone --recursive https://github.com/llvm/llvm-project.git

编译

./build-llvm.sh -t cuda

4.编译amd平台

拉取代码

git clone --recursive https://github.com/RadeonOpenCompute/llvm-project.git

编译

./build-llvm.sh -t rocm

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