FYI, to clarify for others who haven't been following PR41260, the messages...
http://lists.cs.uiuc.edu/pipermail/llvmdev/2009-September/025894.html http://lists.cs.uiuc.edu/pipermail/llvmdev/2009-September/025898.html explain the changes in libgcc handling as of darwin10. If I understand those correctly, the symbols exported through any libgcc_s.10.5 are now provided from libSystem. This means that we aren't really using the FSF libgcc unwinder code but that from unwinder in libSystem. In Darwin10, this behavior occurs no matter the order -lSystem and -lgcc on the link line. Only additional symbols not contained in libgcc_s.10.5 will be used from libgcc_s. Jack
