It turns out that bug #40959 actually is only one of two regressions that breaks bootstrap on FreeBSD/ia64. This is the other case.
Since 2004-11-09 H.J. Lu <hongjiu...@intel.com> PR target/18380 * config/ia64/unwind-ia64.h (_Unwind_FindTableEntry): Mark it hidden. * unwind-dw2.c (_Unwind_FindTableEntry): Removed. _Unwind_FindTableEntry has been marked hidden which is okay for those cases where GCC defines the function but breaks FreeBSD which has this in libc. -- Summary: [4.3/4.4/4.5/4.6 regression] FreeBSD/ia64 builds fails: Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: gerald at pfeifer dot com GCC host triplet: ia64-unknown-freebsd9.0 BugsThisDependsOn: 40959 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45650