message: print some information
diff: # Don't source setup.sh here, because the virtualenv might not be set up yet
  +set -o xtrace
  +
  export NUMCORES=`grep -c ^processor /proc/cpuinfo`
  if [ ! -n "$NUMCORES" ]; then
  export NUMCORES=`sysctl -n hw.ncpu`
  @@ -27,6 +29,7 @@ if [ "$TRAVIS_OS_NAME" == "linux" ]; then
  install_protobuf
  elif [ "$TRAVIS_OS_NAME" == "osx" ]; then
  + brew update
  brew install ccache protobuf
  if [ "${PYTHON_VERSION}" == "python3" ]; then
  brew upgrade python
  