compiling Qt on i386 to x86

Hi

I'm newbe :-). I have problem with compiling qt on i386 to x86_64 architecture. My steps was:

1. configure:
./configure -embedded x86 -platform qws/linux-x86-g++ -xplatform qws/linux-x86_64-g++ -prefix /usr -sysconfdir /etc -shared -largefile -no-qt3support -no-phonon -no-webkit -no-script -no-scripttools -no-declarative -no-declarative-debug -opensource -big-endian -host-big-endian -no-javascript-jit

2. make
After make I've got error:

global/qt_pch.h:1: sorry, unimplemented: 64-bit mode not compiled in
make[1]: *** [.pch/release-shared-emb-x86/QtCore.gch/c++] Error 1
make[1]: Living directory `/root/openelec/SYSTEMS-DESIGN/build.SYSTEMS-DESIGN_EDEN-Intel_3D.x86_64-devel/qt-everywhere-opensource-src-4.7.4/src/corelib'
make: *** [sub-corelib-make_default-ordered] Error 2

I've tried to find something to solve my problem, but I've found only simple instruction which didn't help to me.
Could any of you help me?

Best regards
Plesken

compiling Qt on i386 to x86_64