http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52472
--- Comment #3 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-03-05 10:32:26 UTC --- I thought about setting POINTERS_EXTEND_UNSIGNED but am unsure about other side effects of that define. Presumably, POINTERS_EXTEND_UNSIGNED is undefined because it was never needed before? What do you think?
