[PyQt] build fails for PyQt5 v5.6 in strange way

[Hans-Peter Jansen]

Hello Phil,

an attempt to update the openSUSE PyQt5 build to version 5.6 fails in some 
strange way:

$ python3 configure.py --verbose --confirm-license --qsci-api -u --qmake /usr/lib64/qt5/bin/qmake -c -j 10 --dbus /usr/include/dbus-1.0 LIBDIR_QT=/usr/lib64 STRIP="" MOC=/usr/bin/moc LIBS_OPENGL="" LIBS_X11="" LIBS_THREAD="" QMAKE_CFLAGS+="${CFLAGS} ${CPPFLAGS}" QMAKE_CXXFLAGS+="${CXXFLAGS} ${CPPFLAGS}" QMAKE_LFLAGS+="${LDFLAGS}"
[...]
Qt v5.6.1 (Open Source) is being used.
The qmake executable is /usr/lib64/qt5/bin/qmake.
Qt is built as a shared library.
SIP 4.18 is being used.
The sip executable is /usr/bin/sip.
These PyQt5 modules will be built: QtCore, QtGui, QtMultimedia,
QtMultimediaWidgets, QtNetwork, QtOpenGL, QtPrintSupport, QtQml, QtQuick,
QtSql, QtSvg, QtTest, QtWebKit, QtWebKitWidgets, QtWidgets, QtXml, QtDBus,
_QOpenGLFunctions_2_0, _QOpenGLFunctions_2_1, _QOpenGLFunctions_4_1_Core,
QtSensors, QtX11Extras, QtBluetooth, QtPositioning, QtQuickWidgets,
QtWebSockets, QtWebChannel, QtWebEngineWidgets, QtLocation, QtNfc,
QtWebEngineCore.
The PyQt5 Python package will be installed in
/usr/lib64/python3.4/site-packages.
PyQt5 is being built with generated docstrings.
PyQt5 is being built with 'protected' redefined as 'public'.
The Designer plugin will be installed in /usr/lib64/qt5/plugins/designer.
The qmlscene plugin will be installed in /usr/lib64/qt5/plugins/PyQt5.
The QScintilla API file will be installed in /usr/share/qt5/qsci/api/python.
The dbus support module will be installed in
/usr/lib/python3.4/site-packages/dbus/mainloop.
The PyQt5 .sip files will be installed in /usr/share/sip/PyQt5.
pyuic5, pyrcc5 and pylupdate5 will be installed in /usr/bin.
The interpreter used by pyuic5 is /usr/bin/python3.
Generating the C++ source for the QtCore module...
/usr/bin/sip -w -f -t WS_X11 -t Qt_5_6_1 -B Qt_6_0_0 -o -P -j 10 -a QtCore.api -c /home/hp/src/obs/home:frispete:PyQt5/python3-qt5/PyQt5_gpl-5.6/QtCore -I sip -I /home/hp/src/obs/home:frispete:PyQt5/python3-qt5/PyQt5_gpl-5.6/sip /home/hp/src/obs/home:frispete:PyQt5/python3-qt5/PyQt5_gpl-5.6/sip/QtCore/QtCoremod.sip
sip: Deprecation warning: the -T flag is ignored and deprecated
Error: Unable to create the C++ code.

Any idea, what's going wrong here?

An strace revealed, that sip tries to access QtCore/sipAPIQtCore.h, but 
QtCore is an empty directory.

Pete