Error building qt5base

Hello,
with the latest buildroot version (2014.05-git-00342-g9b4696a) and the attached .config file I get errors when building qt5base. The first error is:

In file included from /home/marco/dev/buildroot/output/host/usr/arm-buildroot-linux-gnueabihf/sysroot/usr/include/X11/Xlib.h:44:0,
from
/home/marco/dev/buildroot/output/host/usr/arm-buildroot-linux-gnueabihf/sysroot/usr/include/EGL/eglvivante.h:222,
from
/home/marco/dev/buildroot/output/host/usr/arm-buildroot-linux-gnueabihf/sysroot/usr/include/EGL/eglplatform.h:38,
from
/home/marco/dev/buildroot/output/host/usr/arm-buildroot-linux-gnueabihf/sysroot/usr/include/EGL/egl.h:34,
from qeglfsscreen.h:49,
from qeglfsintegration.h:45,
from qeglfsintegration.cpp:42:
../../../../include/QtCore/../../src/corelib/io/qurl.h:139:9: error:
expected identifier before numeric constant

          None = 0x0,
          ^

How to find out what is wrong in my configuration? Thanks
Marco

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