[OMPI devel] VT configure problem?

[Ralph Castain]

Undefined symbols for architecture x86_64:
  "___builtin_expect", referenced from:
      __ZN12FilterTraceC26processEventsAndStatisticsEv.omp_fn.0 in 
vtfilter-vt_filter_trc.o
      __Z13vtfilter_mainiPPc.omp_fn.0 in vtfilter-vt_tracefilter.o
      __Z13vtfilter_mainiPPc.omp_fn.1 in vtfilter-vt_tracefilter.o
ld: symbol(s) not found for architecture x86_64

Fresh checkout (r25589) on an x86_64 Mac...obviously, I can --disable-vt, but 
shouldn't this be picked up in configure and corrected?