adjusted llvm-8 installer script

utils/install-llvm-8.0.0.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -e
+
 num_cores=1
 target_dir=./
 re_number="^[0-9]+$"
@@ -13,17 +15,19 @@ num_cores=$1
 target_dir=$2
 
 echo "Getting the complete LLVM source code"
-echo "Get llvm"
-git clone https://github.com/llvm/llvm-project.git ${target_dir}/llvm-project
+if [ ! -d "${target_dir}/llvm-project" ]; then
+	git clone https://github.com/llvm/llvm-project.git ${target_dir}/llvm-project
+fi
 echo "Build the LLVM project"
 cd ${target_dir}/llvm-project/
 git checkout llvmorg-8.0.0
-mkdir build
+mkdir -p build
 cd build
-cmake -G "Unix Makefiles" -DLLVM_ENABLE_PROJECTS='clang;clang-tools-extra;libcxx;libcxxabi;libunwind;lld;lldb;compiler-rt;lld;polly;debuginfo-tests;openmp;parallel-libs' -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_CXX1Y=ON -DLLVM_ENABLE_EH=ON -DLLVM_ENABLE_RTTI=ON -DLLVM_BUILD_LLVM_DYLIB=ON ../llvm
+cmake -G "Unix Makefiles" -DLLVM_ENABLE_PROJECTS='clang;clang-tools-extra;libcxx;libcxxabi;libunwind;lld;lldb;compiler-rt;lld;polly;debuginfo-tests;openmp;parallel-libs' -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_CXX1Y=ON -DLLVM_ENABLE_EH=ON -DLLVM_ENABLE_RTTI=ON -DBUILD_SHARED_LIBS=ON -DLLVM_BUILD_LLVM_DYLIB=ON ../llvm
 make -j${num_cores}
 echo "Run all tests"
 # make -j3 check-all
 echo "Installing LLVM"
 sudo make install
+sudo ldconfig
 echo "Successfully installed LLVM"