See http://svn.boost.org/svn/boost/trunk r76133 "Fix threading detection in GCC-4.7 experimental." Without it, BOOST_DISABLE_THREADS would be defined when compiling with GCC 4.7, which in turn would cause boost/smart_ptr/detail/sp_counted_base.hpp to include a single-thread--mode boost/smart_ptr/detaul/sp_counted_base_nt.hpp which is not suitable in a multi-threaded scenario. Change-Id: Ia30a5c2c241e2e135858a5cab3dd855d05db50c8
From [http://www.boost.org/]. Apart from the spirit parsing framework, LibreOffice currently mostly uses the smart pointers, pool memory and binders functionality.