QtTools does not compile under WEC7

C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\ce\include\xutility(265) : error C2678: binary '<' : no operator found which takes a left-hand operand of type 'const QString' (or there is no acceptable conversion)
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qchar.h(561): could be 'bool operator <(QChar,QChar) throw()' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qbytearray.h(605): or 'bool operator <(const QByteArray &,const QByteArray &)' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qbytearray.h(607): or 'bool operator <(const QByteArray &,const char *)' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qbytearray.h(609): or 'bool operator <(const char *,const QByteArray &)' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qstring.h(630): or 'bool operator <(const QString &,const QString &)' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qstring.h(703): or 'bool operator <(const char *,const QString &)' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qstring.h(710): or 'bool operator <(const char *,const QStringRef &)' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qstring.h(1133): or 'bool operator <(QLatin1String,QLatin1String) throw()' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qstring.h(1190): or 'bool operator <(const char *,QLatin1String)' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qstring.h(1522): or 'bool operator <(const QStringRef &,const QStringRef &)' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qcollator.h(72): or 'bool operator <(const QCollatorSortKey &,const QCollatorSortKey &)' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qelapsedtimer.h(80): or 'bool operator <(const QElapsedTimer &,const QElapsedTimer &) throw()' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qversionnumber.h(297): or 'bool operator <(const QVersionNumber &,const QVersionNumber &) throw()' [found using argument-dependent lookup]
C:\dev\qt5\qttools\src\assistant\help\qhelpsearchindexwriter_clucene.cpp(329): or 'bool
fulltextsearch::clucene::operator <(const fulltextsearch::clucene::QTextHtmlEntity &,const QString &)' [found using argument-dependent lookup]
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qstring.h(637): or 'bool QString::operator <(QLatin1String) const'
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qstring.h(689): or 'bool QString::operator <(const char *) const'
c:\dev\wec7qt560\qtbase\include\qtcore\../../../../qt5/qtbase/src/corelib/tools/qstring.h(696): or 'bool QString::operator <(const QByteArray &) const'
while trying to match the argument list '(const QString, const fulltextsearch::clucene::QTextHtmlEntity)'
C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\ce\include\algorithm(2262) : see reference to function template instantiation 'bool std::_Debug_lt<fulltextsearch::clucene::QTextHtmlEntity,_Ty>(const _Ty1 &,const _Ty2 &,const wchar_t *,unsigned int)' being compiled
with
[
_Ty=QString,
_Ty1=fulltextsearch::clucene::QTextHtmlEntity,
_Ty2=QString
]
C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\ce\include\algorithm(2274) : see reference to function template instantiation '_FwdIt std::_Lower_bound<const fulltextsearch::clucene::QTextHtmlEntity*,_Ty,std::iterator_traits<_Iter>::difference_type>(_FwdIt,_FwdIt,const _Ty
&,_Diff *)' being compiled
with
[
_FwdIt=const fulltextsearch::clucene::QTextHtmlEntity *,
_Ty=QString,
_Iter=const fulltextsearch::clucene::QTextHtmlEntity *,
_Diff=std::iterator_traits<const fulltextsearch::clucene::QTextHtmlEntity *>::difference_type
]
C:\dev\qt5\qttools\src\assistant\help\qhelpsearchindexwriter_clucene.cpp(338) : see reference to function template instantiation '_FwdIt std::lower_bound<const fulltextsearch::clucene::QTextHtmlEntity*,QString>(_FwdIt,_FwdIt,const _Ty &)' being compiled
with
[
_FwdIt=const fulltextsearch::clucene::QTextHtmlEntity *,
_Ty=QString
]
jom: C:\dev\wec7qt560\qttools\src\assistant\help\Makefile.Debug [.obj\debug\qhelpsearchindexwriter_clucene.obj] Error 2
NMAKE : fatal error U1077: 'C:\devtools\jom\jom.EXE' : return code '0x2'
Stop.