Note:
- with -O3 and no -g size will be ~800K

Expression depends on boost.spirit v2.3 from boost_1_43_0
So you need a newer version that the one in Ubuntu Lucid.
You can either A. use a backport or B. install from source.

A. Use a Ubuntu backport
---------------------------


add in your /etc/apt/source.list (or via synaptic or similar tool)
deb http://clam-project.org/download/linux-ubuntu-lucid/backports/ ./

TODO: add arch 64 bits (now only 32)

sudo apt-get update
sudo apt-get install libboost1.42-dev


B. Install boost from source
----------------------------

Install it in for instance $HOME/local/include by running the following as script

#!/bin/bash

wget http://downloads.sourceforge.net/project/boost/boost/1.43.0/boost_1_43_0.tar.gz?use_mirror=mesh
tar zxf boost_1_43_0.tar.gz

cd boost_1_43_0
pwd
./bootstrap.sh

# note: we only want spirit, not any compiled lib

./bjam variant=release \
	--prefix=$HOME/local \
    --without-date-time \
    --without-filesystem \
    --without-graph \
    --without-graph_parallel \
    --without-iostreams \
    --without-math \
    --without-mpi \
    --without-program_options \
    --without-python \
    --without-random \
    --without-regex \
    --without-serialization \
    --without-signals \
    --without-test \
    --without-thread \
    --without-wave \
		install

cd ..
rm -rf boost/log boost_1_43_0
rm -rf *.zip
rm -rf *.gz