====== Distributed compilation using distcc ccache ======

  * Install distcc and ccache in all computers

  sudo apt-get install distcc ccache

  * Put the following in your .bashrc:

  export CCACHE_PREFIX=distcc
  export DISTCC_HOSTS='username@computer1/5:/usr/bin/distccd username@computer2/5:/usr/bin/distccd'
  export ROS_PARALLEL_JOBS="-j10"
  export PATH=${HOME}/local/bin:${PATH}

  * Create some files in a ccache program in your xstow directory (~/local/DIR/ccache):

  cd ~/local/DIR
  mkdir -p ccache/bin
  cd ccache/bin
  ln -s /usr/bin/ccache cc
  ln -s /usr/bin/ccache c++
  ln -s /usr/bin/ccache gcc
  ln -s /usr/bin/ccache g++
  cd ../../
  xstow ccache

  * Activate connection caching. Edit ~/.ssh/config with:

  Host *
    ControlMaster auto
    ControlPath ~/.ssh_tmp/master-%r@%h:%p

  * Create temp dir:

  mkdir ~/.ssh_tmp

  * Make sure you can log in without password
  * Try to compile something!
  * If something doesn't work try: export DISTCC_VERBOSE=1
  * To compile PCL with distcc you have to disable the CMAKE flag -march=native in cmake/pcl_find_sse.cmake

Refs: [[http://toychest.in.tum.de/wiki/robots:rosie_distcc]]

~~DISCUSSION~~