title: ::clock has not been declared
body: <p>i am trying to build a little qt project using Qt Creator.
  i added this driver to my project: <a href="https://github.com/cisco-open-source/qtwebdriver" rel="noreferrer">https://github.com/cisco-open-source/qtwebdriver</a></p>
  
  <p>i includes its libraries, </p>
  
  <p>and when i am trying to build i get this:</p>
  
  <pre><code>g++ -c -pipe -g -std=gnu++1y -Wall -W -D_REENTRANT -fPIC -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I../OfirWebDriverProj -I. -I../ofir/qtwebdriver/out/dist/desktop/release/libs -I../ofir/qtwebdriver/out/dist/desktop/release/libs -I../ofir/qtwebdriver/out/dist/desktop/release/libs -I../ofir/qtwebdriver/out/dist/desktop/release/libs -I../ofir/qtwebdriver/out/desktop/release/Default/lib.target -I../ofir/qtwebdriver/out/desktop/release/Default/lib.target -I../ofir/qtwebdriver/out/desktop/release/Default/lib.target -I../ofir/qtwebdriver/out/desktop/release/Default/lib.target -I../ofir/qtwebdriver/out/dist/desktop/release/h/base -I../ofir/qtwebdriver/out/dist/desktop/release/h -I../ofir/qtwebdriver/out/dist/desktop/release/Test -I/opt/Qt5.9.1/5.9.1/gcc_64/include -I/opt/Qt5.9.1/5.9.1/gcc_64/include/QtWidgets -I/opt/Qt5.9.1/5.9.1/gcc_64/include/QtGui -I/opt/Qt5.9.1/5.9.1/gcc_64/include/QtCore -I. -isystem /usr/include/libdrm -I. -I/opt/Qt5.9.1/5.9.1/gcc_64/mkspecs/linux-g++ -o main.o ../OfirWebDriverProj/main.cpp
  
  In file included from /usr/include/c++/7/chrono:41:0,
                   from /opt/Qt5.9.1/5.9.1/gcc_64/include/QtCore/qobject.h:59,
                   from /opt/Qt5.9.1/5.9.1/gcc_64/include/QtCore/qcoreapplication.h:46,
                   from /opt/Qt5.9.1/5.9.1/gcc_64/include/QtWidgets/qapplication.h:44,
                   from /opt/Qt5.9.1/5.9.1/gcc_64/include/QtWidgets/QApplication:1,
                   from ../OfirWebDriverProj/main.cpp:2:
  
  /usr/include/c++/7/ctime:64:11: error: ‘::clock’ has not been declared
     using ::clock;
             ^~~~~
  
  /usr/include/c++/7/ctime:65:11: error: ‘::difftime’ has not been declared
     using ::difftime;
             ^~~~~~~~
  
  /usr/include/c++/7/ctime:66:11: error: ‘::mktime’ has not been declared
     using ::mktime;
             ^~~~~~
  
  /usr/include/c++/7/ctime:67:11: error: ‘::time’ has not been declared
     using ::time;
             ^~~~
  
  /usr/include/c++/7/ctime:68:11: error: ‘::asctime’ has not been declared
     using ::asctime;
             ^~~~~~~
  
  /usr/include/c++/7/ctime:69:11: error: ‘::ctime’ has not been declared
     using ::ctime;
             ^~~~~
  
  /usr/include/c++/7/ctime:70:11: error: ‘::gmtime’ has not been declared
     using ::gmtime;
             ^~~~~~
  
  /usr/include/c++/7/ctime:71:11: error: ‘::localtime’ has not been declared
     using ::localtime;
             ^~~~~~~~~
  
  /usr/include/c++/7/ctime:72:11: error: ‘::strftime’ has not been declared
     using ::strftime;
             ^~~~~~~~
  </code></pre>