I encountered the problem in bug 230287. Changeset to fix (from bug in URL) is here: http://svn.boost.org/trac/boost/changeset/44440
These link errors also happen on sparc. Taking upstream's fix for arm/hppa and adding "&& !defined(__sparc__)" fixes it. Can you backport upstream's patch to =dev-libs/boost-1.35.0-r1 and add the __sparc__ check?
Fixed in rev.bump