I have narrowed the failure down a bit. Revision 142713 bootstraps okay on i686-apple-darwin9 but revision 142715 fails at the same place in the linkage of the -m64 version of libgfortran. I will back up to revision 142714 next to confirm that the problem was introduced with...
------------------------------------------------------------------------ r142715 | spop | 2008-12-12 12:24:23 -0500 (Fri, 12 Dec 2008) | 6 lines 2008-12-12 Sebastian Pop <sebastian....@amd.com> * configure.ac (ppllibs): Add by default the lib flags. * configure: Regenerate.