net-p2p/rtorrent misses some includes that are required by gcc-4.3. I have filed a bug report upstream. http://libtorrent.rakshasa.no/ticket/1267
Created attachment 145653 [details, diff] patch for missing includes
Adding net-p2p since drizzt is unresponsive.
Fixed this myself.
*** Bug 260854 has been marked as a duplicate of this bug. ***