http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49992
--- Comment #16 from Iain Sandoe <iains at gcc dot gnu.org> 2011-08-09 11:56:33 UTC --- (In reply to comment #12) > (In reply to comment #10) > > This is radar://6320843 "duplicate symbols from static libraries not > > properly > > ignored" revisiting us... > > hm I doubt it. > Check the Makefiles for darwin11 - but, on x86_64-darwin10, RANLIB is > "ranlib" > without the "-c". well, apologies - it DOES seem to be this issue. libcommon.a , libbackend.a amd libcommon-target.a are being "ranlib -c". (these appear to be the only cases). diagnostics.o is forced in by resolving ___gnu_lto_v1. RANLIB_FLAGS is (intentionally) to "-c" by gcc/configure on *-*-darwin* so .. we need to figure out what to do next - there's no comment on what problem was solved by adding the "-c" in configure - only that it makes darwin's ranlib do the same as others.