[boost] Deprecation guidelines?

I was trying to figure out how Boost handles deprecated classes, functions, headers, macros, etc. The following command finds several approaches within boost $ grep -ir deprecate boost-1.44.0/include/boost/* \ | grep -v "This header is deprecated" \ | grep -v BOOST_SPIRIT_DEPRECATED Surprisingly, none of these use compiler support. e.g. http://stackoverflow.com/questions/295120/c-mark-as-deprecated Where can one find guidelines on how to deprecate things in Boost? What is the proper way to check that code using Boost is clean? Thanks, Daniel