> You're skipping some steps here. :) Make sure TQT_REAL_TQT is set where?

Make sure that it is set to 1 via a #define

> Where and how do I check?

One way would be to select a failing C++ file and insert the following
block after all the #include statements:

#ifdef TQT_REAL_TQT
#error TQT_REAL_TQT is SET
#else
#error TQT_REAL_TQT is NOT set
#endif

Tim