Qt4: Help, can not install or update any QT lib/app anymore!

[O. Hartmann]

Dear Sirs,
on a very 'production'-sensitive box I get an error whenever I try to 
install any qt4-related application or library. After deinstalling every 
qt4-lib/-app, and deleting every /usr/local/*/qt4 directory, I'm 
incapable of installing anything related to Qt4, even qt4-corelib fails.

I need those qt4-stuff for several applications and would appreciate any 
help. Please email, I'm not subscriber of the -question'-mailinglist.

Thanks in advance,

Oliver
thusnelda# make install clean
===>   qt4-corelib-4.5.3 depends on package: qt4-qmake>=4.5.3 - found
===>   qt4-corelib-4.5.3 depends on package: qt4-moc>=4.5.3 - not found
===>    Verifying install for qt4-moc>=4.5.3 in /usr/ports/devel/qt4-moc
===>  Building for qt4-moc-4.5.3
[...]

c++ -c -O2 -pipe -march=nocona -fno-strict-aliasing -O2 -pipe 
-march=nocona -fno-strict-aliasing -Wall -W -DQT_BOOTSTRAPPED 
-DQT_LITE_UNICODE -DQT_NO_CAST_FROM_ASCII -DQT_NO_CAST_TO_ASCII 
-DQT_NO_CODECS -DQT_NO_DATASTREAM -DQT_NO_GEOM_VARIANT -DQT_NO_LIBRARY 
-DQT_NO_QOBJECT -DQT_NO_STL -DQT_NO_SYSTEMLOCALE -DQT_NO_TEXTSTREAM 
-DQT_NO_THREAD -DQT_NO_UNICODETABLES -DQT_NO_USING_NAMESPACE 
-D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE 
-I/usr/local/share/qt/mkspecs/freebsd-g++ -I. -I../../../include 
-I../../../include/QtCore -I../../../include/QtXml -I/usr/local/include 
-o .obj/release-static/qfsfileengine.o ../../corelib/io/qfsfileengine.cpp
../../corelib/io/qfsfileengine.cpp: In member function 'bool 
QFSFileEnginePrivate::openFh(QFlags<QIODevice::OpenModeFlag>, FILE*)':
../../corelib/io/qfsfileengine.cpp:309: error: 'QT_FSEEK' was not 
declared in this scope
../../corelib/io/qfsfileengine.cpp: In member function 'qint64 
QFSFileEnginePrivate::posFdFh() const':
../../corelib/io/qfsfileengine.cpp:531: error: 'QT_FTELL' was not 
declared in this scope
../../corelib/io/qfsfileengine.cpp: In member function 'bool 
QFSFileEnginePrivate::seekFdFh(qint64)':
../../corelib/io/qfsfileengine.cpp:561: error: 'QT_OFF_T' was not 
declared in this scope
../../corelib/io/qfsfileengine.cpp:561: error: 'QT_FSEEK' was not 
declared in this scope
../../corelib/io/qfsfileengine.cpp: In member function 'qint64 
QFSFileEnginePrivate::readFdFh(char*, qint64)':
../../corelib/io/qfsfileengine.cpp:636: error: 'QT_FTELL' was not 
declared in this scope
../../corelib/io/qfsfileengine.cpp:636: error: 'QT_FSEEK' was not 
declared in this scope
../../corelib/io/qfsfileengine.cpp: In member function 'qint64 
QFSFileEnginePrivate::readLineFdFh(char*, qint64)':
../../corelib/io/qfsfileengine.cpp:707: error: 'QT_OFF_T' was not 
declared in this scope
../../corelib/io/qfsfileengine.cpp:707: error: expected `;' before 'oldPos'
../../corelib/io/qfsfileengine.cpp:712: error: 'oldPos' was not declared 
in this scope
../../corelib/io/qfsfileengine.cpp:712: error: 'QT_FTELL' was not 
declared in this scope
*** Error code 1

Stop in 
/usr/ports/devel/qt4-moc/work/qt-x11-opensource-src-4.5.3/src/tools/bootstrap.
*** Error code 1

Stop in /usr/ports/devel/qt4-moc.
*** Error code 1

Stop in /usr/ports/devel/qt4-corelib.