[Bug c++/80445] /usr/include/c++/6.3.1/cstdio:124:11: error: ‘::gets’ has not been declared using ::gets;

[anton.kochkov at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80445

--- Comment #4 from Anton Kochkov <anton.kochkov at gmail dot com> ---
here is /usr/include/qt5/QtCore/qbytearray.h:

#ifndef QBYTEARRAY_H
#define QBYTEARRAY_H

#include <QtCore/qrefcount.h>
#include <QtCore/qnamespace.h>
#include <QtCore/qarraydata.h>

#include <stdlib.h>
#include <string.h>
#include <stdarg.h>

#include <string>   // <-- line 52
#include <iterator>

Seem no namespace tricks