Build flang

build-flang.sh

#!/bin/bash -ex

export STAGEDIR=$(pwd)
export INSTALLDIR=$(pwd)/install
export BUILDDIR=$(pwd)/build
export BUILDFLANGDIR=$(pwd)/build-flang

mkdir -p ${BUILDDIR}
mkdir -p ${BUILDFLANGDIR}

#################
# Checkout code #
#################

# LLVM
cd $STAGEDIR
git clone --depth 1 -b release_40 https://github.com/llvm-mirror/llvm.git

# Clang
cd $STAGEDIR/llvm/tools
git clone --depth 1 -b flang_release_40 https://github.com/flang-compiler/clang.git

# OpenMP RTL
cd $STAGEDIR/llvm/projects
git clone --depth 1 -b release_40 https://github.com/llvm-mirror/openmp.git

# Flang itself
cd $STAGEDIR
git clone https://github.com/flang-compiler/flang.git

##############
# Build code #
##############

# Build llvm + clang
cd $BUILDDIR
cmake ../llvm/ \
   -G Ninja \
   -DBUILD_SHARED_LIBS=ON \
   -DCMAKE_INSTALL_PREFIX=$INSTALLDIR
ninja
ninja install

# Build flang
cd $BUILDFLANGDIR
cmake ../flang \
    -DCMAKE_INSTALL_PREFIX=$INSTALLDIR \
    -DCMAKE_CXX_COMPILER=$INSTALLDIR/bin/clang++ \
    -DCMAKE_C_COMPILER=$INSTALLDIR/bin/clang \
    -DCMAKE_Fortran_COMPILER=$INSTALLDIR/bin/flang
make
make install

######################
# Environment script #
######################

echo "export PATH=$INSTALLDIR/bin:\$PATH" > flang-env.sh
echo "export LD_LIBRARY_PATH=$INSTALLDIR/lib:\$LD_LIBRARY_PATH" >> flang-env.sh