http://gcc.gnu.org/bugzilla/show_bug.cgi?id=1773
--- Comment #127 from Bruce Adams <tortoise_74 at yahoo dot co.uk> 2011-11-26 12:10:26 UTC --- (In reply to comment #126) > "201103" of course. Perhaps it is my misunderstanding. I assume __cpluscplus is defined by the compiler. Could it come from a system header or system library instead? g++ must include the std C++ library because otherwise I wouldn't be able to use unique_ptr with g++ 4.7 when I can't use it with g++ 4.1. Could someone confirm whether this change is in the 20111119 snapshot or only in main please?