Compile error in qtbase/examples/opengl/hellowindow/hellowindow.h

Version is 5.4.0 Alpha.

Qt was configured with this line:

../qt5/configure -confirm-license -prefix /usr -hostprefix /opt/emlix/master -hostbindir /opt/emlix/master/bin -hostdatadir /opt/emlix/master -bindir /usr/bin -libdir /usr/lib -libexecdir /usr/libexec -headerdir /usr/include/qt5 -archdatadir /usr/lib/qt5 -datadir /usr/share/qt5 -plugindir /usr/lib/qt5/plugins -importdir /usr/lib/qt5/imports -translationdir /usr/share/qt5/translations -xplatform emlix/linux-arm-g++ -release -opensource -shared -pch -force-pkg-config -platform linux-g++ -plugin-sql-sqlite -v -no-rpath -nomake tools -sysroot /opt/emlix/master/sysroot -examplesdir /usr/qt5/examples -make examples -skip androidextras -skip macextras -skip x11extras -skip svg -skip quickcontrols -skip multimedia -skip winextras -skip activeqt -skip location -skip webchannel -skip webkit -skip webkit-examples -skip graphicaleffects -skip quick1 -skip wayland -skip serialport -skip enginio -skip webengine -gui -widgets -alsa -no-cups -dbus-linked -no-directfb -fontconfig -system-freetype -glib -no-iconv -no-icu -system-libjpeg -system-libpng -no-nis -openssl-linked -system-pcre -system-sqlite -tslib -libudev -no-xcb -system-zlib

Compile error is:

In file included from /tmp/e2/build/qt-everywhere-opensource-src-5.4.0-alpha/qtbase/examples/opengl/hellowindow/hellowindow.cpp:41:0:
/tmp/e2/build/qt-everywhere-opensource-src-5.4.0-alpha/qtbase/examples/opengl/hellowindow/hellowindow.h:86:5: error: 'QOpenGLShaderProgram' does not name a type
QOpenGLShaderProgram *m_program;
^
/tmp/e2/build/qt-everywhere-opensource-src-5.4.0-alpha/qtbase/examples/opengl/hellowindow/hellowindow.h:87:5: error: 'QOpenGLBuffer' does not name a type
QOpenGLBuffer m_vbo;