Static linking breakes QPrinter

After building Qt 5.0.1 static, QPrinter can not find any printers anymore.

Qt has been configured using options:

./configure -prefix /usr/local/Qt-5.0.1_dynamic -release -opensource -no-xcb -no-eglfs -no-kms -qt-xcb -qt-pcre -no-icu -no-qml-debug -largefile -no-accessibility -no-javascript-jit -qt-zlib -qt-libpng -qt-libjpeg -no-openssl -nomake tools -no-nis -cups -no-dbus -no-openvg -nomake demos -nomake examples -nomake tests

CUPS is installed, also the development files for CUPS.
I configured Qt with the option "-cups". The output of ./configure stated that CUPS is enabled.
Cups management on my pc works. Printing with other applications (Kate, LinbreOffice, Gimp) works fine.

I reconfigured Qt and build the shared libs. When linked dynamically, the QPrinter works fine and shows the installed printers.