QtValidLicenseForGuiModule error

Problem: you get an error that says something like: error: `QtValidLicenseForGuiModule' does not name a type

You probably didn't run configure or for some reason the configure didn't do what it should have. In any case it is an easy fix:

In the file C:\Qt\4.x\src\corelib\global\qconfig.h change the line 13

from:

#  define QT_EDITION QT_EDITION_

to:

#  define QT_EDITION QT_EDITION_DESKTOP