Install llvm 10.0.0 to $HOME/software/llvm-10.0.0

llvm-10.0.0.sh

#! /bin/bash

set -eou pipefail
set -x

workdir=`mktemp -d`
workdir=`readlink -f $workdir`
echo $workdir

#trap "{ echo cleaning up $workdir; rm -r $workdir; }" EXIT
trap "{ echo workdir was $workdir; }" EXIT

cd $workdir

git clone --recursive \
          --branch llvmorg-10.0.0 \
          --depth 1 \
          git@github.com:llvm/llvm-project.git

# build only clang, libc++, libc++abi
mkdir -p $workdir/build-base
cd $workdir/build-base && cmake $workdir/llvm-project/llvm \
  -DCMAKE_BUILD_TYPE=MinSizeRel \
  -DLLVM_ENABLE_PROJECTS="clang;libcxx;libcxxabi" \
  -DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=ON
cd $workdir/build-base && nice -n20 make -j`nproc` -k || make

# use clang to build the full toolsuite
# libc and debuginfo-tests both error
cd $workdir
mkdir -p $workdir/build
cd $workdir/build && cmake $workdir/llvm-project/llvm \
  -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;compiler-rt;libclc;libcxx;libcxxabi;libunwind;lld;lldb;openmp;parallel-libs;polly;pstl" \
  -DLLVM_ENABLE_LIBCXX=ON \
  -DCMAKE_CXX_COMPILER=$workdir/build-base/bin/clang++ \
  -DCMAKE_C_COMPILER=$workdir/build-base/bin/clang  \
  -DCMAKE_BUILD_TYPE=MinSizeRel \
  -DCMAKE_INSTALL_PREFIX=$HOME/software/llvm-10.0.0

cd $workdir/build && nice -n20 make -j`nproc` -k || make
cd $workdir/build && make install