On Tue, 10 Jul 2018 at 13:53, Liu Hao wrote: > > 在 2018年07月10日 19:28, Klaus Rudolph 写道: > > Is it a bug, that every function emmits a exact copy for calling std::ios_base::Init::Init()@plt ? It is only needed once but emmited for each function. This wastes a lot of program space. In addition for my example, I removed the call to my functions so there is no place anymore where I need iostream operations. But the code is still present, also if the requiring functions are not linked in. > > > > No. According to the C++ standard, inclusion of <iostream> shall behave > as if an object of type `std::ios_base::Init` and with static storage > duration is defined [1], which results in a constructor call in every > translate unit that has `#include <iostream>`. Right. See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44952 for further discussion.
