====== Distributed compilation ======

  * apt-get install distcc ccache

  mkdir local/DIR/ccache_links/bin
  cd local/DIR/ccache_links/bin
  ln -s /usr/bin/ccache c++
  ln -s /usr/bin/ccache cc
  ln -s /usr/bin/ccache g++
  ln -s /usr/bin/ccache gcc

  * Add the following lines to your .bashrc

export CCACHE_PREFIX=distcc
export DISTCC_HOSTS='memeruiz@lars/10:/usr/bin/distccd localhost/8'

  * Login again.
  * Configure your building system to use multiple processes. Ej: make -j18, ROS_PARALLEL_JOBS=-j18, CONCURRENCY_LEVEL=18
  * Ready.