Added script for build environment preparation [#METRIQA-1369].

utils/prepare-environment/install-clang.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+set -e
+
+BRANCH=trunk
+#BRANCH=tags/RELEASE_400/final
+
+THREADS=$(grep -c ^processor /proc/cpuinfo)
+
+cd ~
+sudo apt-get install subversion
+mkdir llvm
+cd llvm
+svn co "http://llvm.org/svn/llvm-project/llvm/${BRANCH}" llvm
+cd llvm/tools
+svn co "http://llvm.org/svn/llvm-project/cfe/${BRANCH}" clang
+cd ..
+cd projects/
+svn co "http://llvm.org/svn/llvm-project/compiler-rt/${BRANCH}" compiler-rt
+cd ../..
+mkdir build
+cd build/
+cmake -D CMAKE_BUILD_TYPE:STRING=Release ../llvm
+make -j $THREADS
+sudo make install
+hash clang