build_flang-classic.sh

#!/bin/bash
# 
#Copyright © Advanced Micro Devices, Inc., or its affiliates.
#
#SPDX-License-Identifier:  MIT
# 
#  build_flang-classic.sh:  Script to build the flang-classic binary driver
#         This driver will never call flang -fc1, it only calls binaries 
#             clang, flang1, flang2, build elsewhere
#  Instead of downloading the ROCm 5.5 llvm package we have to
#  compile the 11vm/clang libs from source to support various
#  operating systems and spack. This will be the llvm-classic build step.
#  These libs/headers are not installed and will picked up from the build
#  tree for flang-classic.
#
BUILD_TYPE=${BUILD_TYPE:-Release}

# --- Start standard header to set AOMP environment variables ----
realpath=$(realpath "$0")
thisdir=$(dirname "$realpath")
. "$thisdir/aomp_common_vars"
# --- end standard header ----

if [ "$AOMP_BUILD_FLANG_CLASSIC" == 0 ] ; then
   if [ "$1" != "install" ] ; then
      echo "WARNING:  ROCM install for $AOMP_FLANG_CLASSIC_REL/llvm-classic not found."
      echo "          This build will skip build of flang-classic."
      echo "          The flang will link to the clang driver."
   fi
   exit
fi

if [ "$AOMP_USE_NINJA" == 0 ] ; then
    AOMP_SET_NINJA_GEN=()
else
    AOMP_SET_NINJA_GEN=(-G Ninja)
fi
osversion=$(grep -e ^VERSION_ID < /etc/os-release)
if [[ $osversion =~ \"7\. ]] || [[ $osversion =~ \"8\. ]]; then
  _cxx_flag=(-DCMAKE_CXX_FLAGS='-D_GLIBCXX_USE_CXX11_ABI=0')
else
  _cxx_flag=()
fi

# We need a version of ROCM llvm that supports flang-classic 
# via the link from flang to clang.  rocm 5.5 would be best. 
# This will enable removal of flang-classic driver support 
# from clang to make way for flang  

# Do not change the AOMP_LFL_DIR default because it is the subdirectory
# from where we build the flang-classic driver binary.  This is the
# Last Frozen LLVM (LFL) for which there is amd-only clang driver support
# for flang.  Originally there was no subdirectory for LFL so setting
# AOMP_LFL_DIR to "/" would build flang-classic with the original
# ROCm 5.6 sources.
AOMP_LFL_DIR=${AOMP_LFL_DIR:-"17.0-4"}
# comment out above line and uncomment next line for new LFL
#AOMP_LFL_DIR=${AOMP_LFL_DIR:-17.0-4}

declare -a MYCMAKEOPTS

MYCMAKEOPTS=(-DCMAKE_BUILD_TYPE="$BUILD_TYPE"
             -DCMAKE_C_COMPILER="$LLVM_INSTALL_LOC/bin/clang"
             -DCMAKE_CXX_COMPILER="$LLVM_INSTALL_LOC/bin/clang++"
             "${_cxx_flag[@]}"
             -DCMAKE_CXX_STANDARD=17
             -DCMAKE_INSTALL_PREFIX="$LLVM_INSTALL_LOC"
             "${AOMP_SET_NINJA_GEN[@]}")

if [ "$AOMP_STANDALONE_BUILD" == 1 ] ; then
  MYCMAKEOPTS=("${MYCMAKEOPTS[@]}" -DBUILD_SHARED_LIBS=ON
               "${AOMP_ORIGIN_RPATH[@]}")
else
  MYCMAKEOPTS=("${MYCMAKEOPTS[@]}" -DBUILD_SHARED_LIBS=OFF
               "${OPENMP_EXTRAS_ORIGIN_RPATH[@]}")
fi


if [ "$1" == "-h" ] || [ "$1" == "help" ] || [ "$1" == "-help" ] ; then 
  help_build_aomp
fi

if [ "$AOMP_STANDALONE_BUILD" == 1 ] ; then 
   if [ ! -L "$AOMP" ] && [ -d "$AOMP" ] ; then 
      echo "ERROR: Directory $AOMP is a physical directory."
      echo "       It must be a symbolic link or not exist"
      exit 1
   fi
fi

check_writable_installdir "$1" "$AOMP_INSTALL_DIR"

# Allow extglobs -- seems like this must be set before bash starts parsing
# the 'if' block below.
shopt -s extglob

if [ "$1" != "nocmake" ] && [ "$1" != "install" ] ; then
   echo
   echo "This is a FRESH START. ERASING any previous builds in $BUILD_DIR/build/flang-classic/$AOMP_LFL_DIR"
   echo "Use ""$0 nocmake"" or ""$0 install"" to avoid FRESH START."
   if [ -d "$BUILD_DIR/build/flang-classic/$AOMP_LFL_DIR" ]; then
     # This needs extglob enabled, as set above.
     rm -rf "$BUILD_DIR/build/flang-classic/$AOMP_LFL_DIR"/!("llvm-classic")
   else
     echo "ERROR: Build llvm-classic before flang-classic."
     exit 1
   fi
else
   if [ ! -d "$BUILD_DIR/build/flang-classic/$AOMP_LFL_DIR" ] ; then
      echo "ERROR: The build directory $BUILD_DIR/build/flang-classic/$AOMP_LFL_DIR does not exist"
      echo "       run $0 without nocmake or install options. "
      exit 1
   fi
fi

echo
# Cmake flang-classic.
if [ "$1" != "nocmake" ] && [ "$1" != "install" ] ; then
   cd "$BUILD_DIR/build/flang-classic/$AOMP_LFL_DIR" || exit
   echo " -----Running cmake ---- " 
   echo "${AOMP_CMAKE}" "$(shquot "${MYCMAKEOPTS[@]}")" "$AOMP_REPOS/$AOMP_FLANG_REPO_NAME/flang-classic/$AOMP_LFL_DIR"

   if ! ${AOMP_CMAKE} "${MYCMAKEOPTS[@]}" "$AOMP_REPOS/$AOMP_FLANG_REPO_NAME/flang-classic/$AOMP_LFL_DIR" 2>&1; then 
      echo "ERROR cmake failed. Cmake flags"
      echo "      $(shquot "${MYCMAKEOPTS[@]}")"
      exit 1
   fi
fi

if [ "$1" = "cmake" ]; then
   exit 0
fi

echo

# Build flang-classic.
echo " ---  Running $AOMP_NINJA_BIN for $BUILD_DIR/build/flang-classic/$AOMP_LFL_DIR ---- "
cd "$BUILD_DIR/build/flang-classic/$AOMP_LFL_DIR" || exit

if ! $AOMP_NINJA_BIN -j "$AOMP_JOB_THREADS"; then
      echo " "
      echo "ERROR: $AOMP_NINJA_BIN -j $AOMP_JOB_THREADS  FAILED"
      echo "To restart:"
      echo "  cd $BUILD_DIR/build/flang-classic/$AOMP_LFL_DIR"
      echo "  $AOMP_NINJA_BIN"
      exit 1
fi

if [ "$1" == "install" ] ; then
   echo " -----Installing to $AOMP_INSTALL_DIR ---- "

   if ! $SUDO "${AOMP_CMAKE}" --build . -j "$AOMP_JOB_THREADS" --target install; then
      echo "ERROR make install failed "
      exit 1
   fi
   echo
   echo "SUCCESSFUL INSTALL to $AOMP_INSTALL_DIR"
   echo
else 
   echo 
   echo "SUCCESSFUL BUILD, please run:  $0 install"
   echo "  to install into $AOMP"
   echo 
fi