mxcl/homebrew — pull request #8928 by rohansingh (2011-12-02 04:58:20+00:00)
Title: boost: Added --with-thread-unsafe to build thread unsafe binaries

Added a --with-thread-unsafe option that switches from building
with threading=multi (default) to threading=multi,single/link=static.

Some packages like pgmagick (http://pypi.python.org/pypi/pgmagick/)
link against -lboost_python instead of -lboost_python-mt, which
makes this necessary.