https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63699
--- Comment #5 from howarth at bromo dot med.uc.edu --- Posted patch at https://gcc.gnu.org/ml/gcc-patches/2014-11/msg00662.html. Note that the alternate approach of modifying gcc/system.h to include <string> conditionally on __cplusplus before "safe-ctype.h" causes bootstrap breakage elsewhere on darwin.
