The new modular configuration system requires one global
header per module, that is included by all other files in
A similar scheme and naming convention is already being used
for many other modules (e.g. printsupport, qml, quick).
That header will later on #include the configuration file
for Qt Gui. For now it defines the Q_GUI_EXPORT macro for
In addition, add a private global header, qtguiglobal_p.h,
that can later on include the private config header for
Qt Gui for things we don't want to export to the world.
Reviewed-by: Oswald Buddenhagen <firstname.lastname@example.org>