net-libs/rb_libtorrent configure fails with --as-needed and dev-libs/boost-1.35.0-r1: checking whether the Boost::Filesystem library is available... yes configure: error: Unable to find Boost.Filesystem library, currently this is required. Boost::Filesystem is ok, the configuration checks have to add -lboost_system to LIBS so boost_filesystem can be used. I'm not sure yet how to fix it correctly.
FYI/IIRC, same problem with boost headers was fixed in libopenraw and bmpx by altering the m4 macros they ship for boost detection.. missing attachment, config.log.
This and other boost-1.35 compatibility problems are fixed in svn repo r2385 by updating boost's m4 files.
After looking at the needed changes. It's no worth for me to fix it and I prefer to wait the next release. I'm keeping the bug open though, for keeping track of the problem.
*** Bug 248070 has been marked as a duplicate of this bug. ***
Works for me in 0.14.1.