http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50229
--- Comment #9 from Ruben Van Boxem <vanboxem.ruben at gmail dot com> 2011-10-26 12:49:43 UTC --- I received a build of a darwinx-ld binary from the darwinx toolchain maintainer that accepts the -no_compact_unwind option, and the problem has not gone away. Configure is either using the wrong headers for the build or configure is messing up.