------- Comment #2 from redi at gcc dot gnu dot org 2010-04-21 09:40 ------- Right, this is a GNU extension used to implement the library, which was later standardised. We also support 'long long' in C++03 mode. GCC is not intended to be a strict ANSI C++ verification tool, so doesn't reject all non-portable programs
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43824
