fixed Eigen issue on existing installations

build.sh

@@ -5,7 +5,7 @@ SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 pushd "$SCRIPT_DIR"
 
 set -e
-set +x
+set -x
 
 # update any git submodules, currently rpclib
 git submodule update --init --recursive 
@@ -78,16 +78,20 @@ rsync -a --delete AirLib Unreal/Plugins/AirSim/Source
 Unreal/Environments/Blocks/clean.sh
 rsync -a --delete Unreal/Plugins Unreal/Environments/Blocks
 
+set +x
+
+echo ""
 echo ""
 echo "=================================================================="
 echo " AirSim plugin is build! Here's how to build Unreal project."
 echo "=================================================================="
 echo "If you are using Blocks environment, its already updated."
-echo "If you are using your own environment, update blugin with this:"
+echo "If you are using your own environment, update plugin using,"
 echo "rsync -t -r Unreal/Plugins path/to/MyUnrealProject"
 echo ""
-echo "For help see https://github.com/Microsoft/AirSim/blob/master/docs/linux_build.md"
+echo "For help see:"
+echo "https://github.com/Microsoft/AirSim/blob/master/docs/linux_build.md"
 echo "=================================================================="
 
 
-popd
+popd

setup.sh

@@ -1,6 +1,6 @@
 #! /bin/bash
 
-set +x
+set -x
 set -e
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
@@ -27,7 +27,7 @@ else
 fi
 
 #build libc++
-rm -rf llvm-build
+sudo rm -rf llvm-build
 mkdir llvm-build && cd llvm-build
 
 export C_COMPILER=clang-3.9
@@ -44,7 +44,7 @@ make cxx
 sudo make install-libcxx install-libcxxabi 
 
 #install EIGEN library
-if [[ -z "${EIGEN_ROOT}" ]]; then 
+if [[ -z "${EIGEN_ROOT}" ]] || [[ ! -d eigen ]]; then 
 	echo "EIGEN_ROOT variable is not set"
 	if [[ ! -d eigen ]]; then
 		echo "downloading eigen..."
@@ -60,4 +60,8 @@ fi
 
 popd
 
-
+set +x
+echo ""
+echo "************************************"
+echo "AirSim setup completed successfully!"
+echo "************************************"