qtactiveqt: Compilation with mingw fails due to headersclean check

mingw32-make[3]: Entering directory 'D:/dev/qt/5.5/mingw-builds-4.9.2-32/qtactiveqt/src/activeqt'
g++ -c -pipe -fno-keep-inline-dllexport -g -std=c++0x -fno-exceptions -frtti -Wall -Wextra -DUNICODE -DQT_BUILD_AXBASE_LIB -D
QT_BUILDING_QT -D_CRT_SECURE_NO_WARNINGS -D_USE_MATH_DEFINES -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -
DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x040800 -DQT_NO_EXCEPTIONS -DQT_WIDGETS_LIB -
DQT_GUI_LIB -DQT_CORE_LIB -Wall -Wextra -Werror -Woverloaded-virtual -Wshadow -Wundef -Wnon-virtual-dtor -Wpointer-arith -Wfo
rmat-security -Wno-long-long -Wno-variadic-macros -pedantic-errors -Wchar-subscripts -Wcast-align -ID:\dev\qt\5.5\src\qtactiv
eqt\src\activeqt -I. -ID:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\include -ID:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\includ
e\ActiveQt -ID:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\include\ActiveQt\5.5.0 -ID:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\i
nclude\ActiveQt\5.5.0\ActiveQt -Itmp -ID:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\include\QtGui\5.5.0 -ID:\dev\qt\5.5\mingw-b
uilds-4.9.2-32\qtbase\include\QtGui\5.5.0\QtGui -ID:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\include\QtWidgets -ID:\dev\qt\5.
5\mingw-builds-4.9.2-32\qtbase\include\QtGui -ID:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\include\QtCore -I.moc\debug -ID:\de
v\qt\5.5\src\qtbase\mkspecs\win32-g++  -DQT_NO_CAST_TO_ASCII=1 -DQT_NO_CAST_FROM_ASCII=1 -DQT_STRICT_ITERATORS -DQT_NO_URL_CA
ST_FROM_STRING=1 -DQT_NO_CAST_FROM_BYTEARRAY=1 -DQT_NO_KEYWORDS=1 -DQT_USE_FAST_CONCATENATION -DQT_USE_FAST_OPERATOR_PLUS -Ds
ignals=int -Dslots=int -Demit=public: -Dforeach=public: -Dforever=public: -xc++ D:\dev\qt\5.5\src\qtactiveqt\src\activeqt\con
trol\qaxfactory.h -o .obj\debug\header_qaxfactory.o
In file included from D:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\include/QtCore/qobjectdefs.h:1:0,
                 from D:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\include/QtCore/../../../../src/qtbase/src/corelib/kernel/qob
ject.h:40,
                 from D:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\include/QtCore/qobject.h:1,
                 from D:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\include/QtCore/../../../../src/qtbase/src/corelib/plugin/qfa
ctoryinterface.h:37,
                 from D:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\include/QtCore/qfactoryinterface.h:1,
                 from D:\dev\qt\5.5\src\qtactiveqt\src\activeqt\control\qaxfactory.h:46:
D:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\include/QtCore/../../../../src/qtbase/src/corelib/kernel/qobjectdefs.h:158:32: err
or: 'virtual const QMetaObject* QObject::metaObject() const' was hidden [-Werror=overloaded-virtual]
     virtual const QMetaObject *metaObject() const; \
                                ^
D:\dev\qt\5.5\mingw-builds-4.9.2-32\qtbase\include/QtCore/../../../../src/qtbase/src/corelib/kernel/qobject.h:108:5: note: in
 expansion of macro 'Q_OBJECT'
     Q_OBJECT
     ^
D:\dev\qt\5.5\src\qtactiveqt\src\activeqt\control\qaxfactory.h:67:32: error:   by 'virtual const QMetaObject* QAxFactory::met
aObject(const QString&) const' [-Werror=overloaded-virtual]
     virtual const QMetaObject *metaObject(const QString &key) const = 0;
                                ^
cc1plus.exe: all warnings being treated as errors