Make install does not install qconfig.h on OS X

I configured Qt with the following options on OS X:

./configure -release -prefix /usr/local/Qt-5.1.0rc1 -opensource -confirm-license -nomake examples -nomake demo -nomake tests -platform macx-g++-32

and then did a make followed by make install. The file qconfig.h was not installed, but qglobal.h includes it. So I can't compile my project with this Qt build unless I copy qconfig.h.

On a side note: the Qt binary packages contain many more (private) header files in its include directory than I get with a make install. Why does make install not result in the same as a binary package? (In our project we have to access a couple of private headers for a few featrures.)