Building PyQt5 5.15.3 with SIP v4 fails.

[Phil Thompson]

On 25/02/2021 21:53, Ben Greiner wrote:
> Hi,
> 
> I don't know how much this is still supported. After all the sources
> still provide a configure.py. However with the update to 5.15.3,
> calling python configure.py results in the following fail:
> 
> [   30s] + python3 ../configure.py --verbose --sip=/usr/bin/sip-3.6
> --qmake=/usr/bin/qmake-qt5 --confirm-license --assume-shared --disable
> QtQuick3D --disable QtRemoteObjects --qsci-api --qsci-api-destdir
> /usr/share/qt5/qsci 'QMAKE_CFLAGS+=-fmessage-length=0
> -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2
> -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables
> -fstack-clash-protection -g ' 'QMAKE_CXXFLAGS+=-fmessage-length=0
> -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2
> -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables
> -fstack-clash-protection -g '
> 
> ...
> 
> [   58s] Checking to see if the dbus support module should be built...
> [   58s] pkg-config --cflags-only-I --libs dbus-1
> [   58s] Qt v5.15.2 is being used.
> [   58s] The qmake executable is /usr/bin/qmake-qt5.
> [   58s] Qt is built as a shared library.
> [   58s] SIP 4.19.24 is being used.
> [   58s] The sip executable is /usr/bin/sip-3.6.
> [   58s] These PyQt5 modules will be built: QtCore, QtGui, QtHelp, 
> QtMultimedia,
> [   58s] QtMultimediaWidgets, QtNetwork, QtOpenGL, QtPrintSupport,
> QtQml, QtQuick,
> [   58s] QtSql, QtSvg, QtTest, QtWebKit, QtWebKitWidgets, QtWidgets, 
> QtXml,
> [   58s] QtXmlPatterns, QtDesigner, QtDBus, _QOpenGLFunctions_2_0,
> [   58s] _QOpenGLFunctions_2_1, _QOpenGLFunctions_4_1_Core, QtSensors,
> QtSerialPort,
> [   58s] QtX11Extras, QtBluetooth, QtPositioning, QtQuickWidgets, 
> QtWebSockets,
> [   58s] QtWebChannel, QtLocation, QtNfc, QtTextToSpeech.
> [   58s] The PyQt5 Python package will be installed in
> [   58s] /usr/lib64/python3.6/site-packages.
> [   58s] PyQt5 is being built with generated docstrings.
> [   58s] PyQt5 is being built with 'protected' redefined as 'public'.
> [   58s] The Designer plugin will be installed in
> /usr/lib64/qt5/plugins/designer.
> [   58s] The qmlscene plugin will be installed in 
> /usr/lib64/qt5/plugins/PyQt5.
> [   58s] The QScintilla API file will be installed in
> /usr/share/qt5/qsci/api/python.
> [   58s] The PyQt5 PEP 484 stub files will be installed in
> [   58s] /usr/lib64/python3.6/site-packages/PyQt5.
> [   58s] The dbus support module will be installed in
> [   58s] /usr/lib/python3.6/site-packages/dbus/mainloop.
> [   58s] The PyQt5 .sip files will be installed in 
> /usr/share/sip/PyQt5.
> [   58s] pyuic5, pyrcc5 and pylupdate5 will be installed in /usr/bin.
> [   58s] The interpreter used by pyuic5 is /usr/bin/python3.
> [   58s] Generating the C++ source for the QtCore module...
> [   58s] /usr/bin/sip-3.6 -w -n PyQt5.sip -t WS_X11 -t Qt_5_15_0 -f -P
> -o -a QtCore.api -y QtCore.pyi -c
> /home/abuild/rpmbuild/BUILD/PyQt5-5.15.3/build/QtCore -I sip -I
> /home/abuild/rpmbuild/BUILD/PyQt5-5.15.3/sip
> /home/abuild/rpmbuild/BUILD/PyQt5-5.15.3/sip/QtCore/QtCoremod.sip
> [   58s] sip: Py_ssize_t is undefined
> 
> 
> It used to work with 5.15.2. Adding -I /usr/include/python3.6m to the
> sip call does not help. Am I missing something?
> 
> (This is an rpmbuild for  openSUSE Leap 15.2. Building with SIP v6 and
> sip-build works fine.)

SIP v4 is unsupported but that was an unintentional change. I can fix 
PyQt5 but it will be some time before the next release. Or I can fix SIP 
v4 (it's the addition of one line) and make a release much sooner.

Phil