Qt won't compile with QT_NO_DEBUG_STREAM

I provided a custom qconfig-my.h file, which contained, besides other things, these lines:

#ifndef QT_NO_DEBUG_STREAM

1. define QT_NO_DEBUG_STREAM
   #endif

I expected to see a nice clean compilation without support for "qDebug() << xxx" or "qWarning() << yyy", which I won't use on my embedded target anyway.

Instead I got 4 compilation errors, each in a line like this:

qWarning() << "QAbstractItemModel::endInsertRows: Invalid index (" << old.row() + count << "," << old.column() << ") in model" << q_func();

They're all in the same file, src/corelib/kernel/qabstractitemmodel.cpp.

Please use qWarning("Invalid index (%d,%d) in model ...", x,y,z) instead. Use my attached patch as an idea-giver.

I don't know what q_func() returns to the debug stream, so my patch simply emits the address ("%p").