------- Comment #5 from redi at gcc dot gnu dot org 2010-07-15 16:38 ------- This is why you should only include <iostream> if you want actually want std::cin, std::cout or std::cerr (or the wide character equivalents.) Otherwise you should only include one or more of <iosfwd>, <istream> and <ostream>, as needed.
(In reply to comment #3) > ... and are we required to emit the constructor even if we know var is not > used? 27.4 [iostream.objects] paragraph 2 The results of including <iostream> in a translation unit shall be as if <iostream> defined an instance of ios_base::Init with static storage duration. Similarly, the entire program shall behave as if there were at least one instance of ios_base::Init with static storage duration. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44952
