http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53440
--- Comment #4 from Ryan Mansfield <rmansfield at qnx dot com> 2012-05-23 00:12:59 UTC --- (In reply to comment #3) > (In reply to comment #2) > > Someone needs to implement the thunk functionality for arm. > > The ARM port does have MI thunk support. The question is "why isn't it being > used"? I may be answering the question too directly but it's using the default_can_output_mi_thunk_no_vcall and vcall_offset is non-zero. The ARM MI thunk code doesn't do any vcall offset adjustment.