setup.sh

#!/usr/bin/env bash

export SRC_ROOT= path/to/llvm # SET ME
export BUILD = TODO # SET ME
# SET ME. /usr/local will safely "replace" the system installation. Prefixes like /opt/llvm-tot are safer to use
export INSTALL_PREFIX=  /usr/local 

# Checkout the LLVM tree correctly
git clone --depth=1 http://llvm.org/git/llvm.git $SRC_ROOT
git clone --depth=1 http://llvm.org/git/clang.git $SRC_ROOT/tools/clang
git clone --depth=1 http://llvm.org/git/compiler-rt.git $SRC_ROOT/projects/compiler-rt
git clone --depth=1 http://llvm.org/git/libcxx.git $SRC_ROOT/projects/libcxx
git clone --depth=1 http://llvm.org/git/libcxxabi.git $SRC_ROOT/projects/libcxxabi

mkdir $BUILD
cd $BUILD
cmake -DCMAKE_INSTALL_PREFIX=$INSTALL_PREFIX -DCMAKE_BUILD_TYPE=RELEASE $SRC_ROOT

# make -jN