Install HHVM on Ubuntu 12.04/Elementary

install-hhvm.sh

sudo apt-get install git-core cmake g++ libmysqlclient-dev \
  libxml2-dev libmcrypt-dev libicu-dev openssl build-essential binutils-dev \
  libcap-dev libgd2-xpm-dev zlib1g-dev libtbb-dev libonig-dev libpcre3-dev \
  autoconf automake libtool libcurl4-openssl-dev \
  wget memcached libreadline-dev libncurses-dev libmemcached-dev libbz2-dev \
  libc-client2007e-dev php5-mcrypt php5-imagick libgoogle-perftools-dev \
  libcloog-ppl0 libelf-dev libdwarf-dev subversion python-software-properties \
  libmagickwand-dev libxslt1-dev ocaml-native-compilers libevent-dev
  
# Update GCC
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install gcc-4.8 g++-4.8

# Update Alternative
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 60 \
                         --slave /usr/bin/g++ g++ /usr/bin/g++-4.8
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.6 40 \
                         --slave /usr/bin/g++ g++ /usr/bin/g++-4.6
sudo update-alternatives --set gcc /usr/bin/gcc-4.8

# Install Boost 
sudo add-apt-repository ppa:mapnik/boost
sudo apt-get update
sudo apt-get install libboost1.49-dev libboost-regex1.49-dev \
  libboost-system1.49-dev libboost-program-options1.49-dev \
  libboost-filesystem1.49-dev libboost-thread1.49-dev