Download and build CLang 3.3

build_clang

#!/bin/sh -ex
wget -nc http://llvm.org/releases/3.3/cfe-3.3.src.tar.gz
wget -nc http://llvm.org/releases/3.3/llvm-3.3.src.tar.gz
wget -nc http://llvm.org/releases/3.3/compiler-rt-3.3.src.tar.gz
wget -nc http://llvm.org/releases/3.3/clang-tools-extra-3.3.src.tar.gz
rm -rf llvm
mkdir -p llvm
tar xfz llvm-3.3.src.tar.gz -C llvm --strip-components=1
mkdir -p llvm/tools/clang
tar xfz cfe-3.3.src.tar.gz -C llvm/tools/clang --strip-components=1
mkdir -p llvm/tools/clang/tools/extra
tar xfz clang-tools-extra-3.3.src.tar.gz -C llvm/tools/clang/tools/extra --strip-components=1
mkdir -p llvm/projects/compiler-rt
tar xfz compiler-rt-3.3.src.tar.gz -C llvm/projects/compiler-rt --strip-components=1

mkdir -p build
cd build
CC=gcc CXX=g++ ../llvm/configure \
  --enable-optimizations \
  --disable-asserts \
  --enable-shared
make -j4