[PyQt] Potential API break in PyQt4 snapshot

[Davide Pesavento]

On Mon, May 30, 2016 at 11:28 PM, Phil Thompson
<phil at riverbankcomputing.com> wrote:
> On 30 May 2016, at 8:25 pm, Davide Pesavento <pesa at gentoo.org> wrote:
>>
>> A Gentoo Linux user has encountered a compilation failure while
>> building KDE4's kate editor (version 4.14.3) against the latest PyQt4
>> snapshot (version 4.12.dev1605051544).
>>
>> Is this an unintentional API change in PyQt4, or is kate using
>> undocumented/private APIs? Or something else?
>
> Probably something else - possibly trying to compile against Qt5 when configured for Qt4.

How's that possible? There's no mention of "[Qq][Tt]5" in the whole
build log, plus the errors clearly mention PyQt4 sip files, so I think
it's building against Qt4 as it should.

FYI, the full compiler command line was:

cd /var/tmp/portage/kde-apps/kate-4.14.3/work/kate-4.14.3_build/addons/kate/pate/sip
&& /usr/bin/x86_64-pc-linux-gnu-g++
-DKDE4_CMAKE_TOPLEVEL_DIR_LENGTH=42 -DKDE_DEFAULT_DEBUG_AREA=13040
-DKDE_DEPRECATED_WARNINGS -DKTEXTEDITOR_NO_DEPRECATED
-DQT_NO_CAST_TO_ASCII -DQT_NO_STL -DQT_USE_FAST_CONCATENATION
-DQT_USE_FAST_OPERATOR_PLUS -D_BSD_SOURCE -D_DEFAULT_SOURCE
-D_REENTRANT -D_XOPEN_SOURCE=500 -Dpython_module_PyKate4_kate_EXPORTS
-I/var/tmp/portage/kde-apps/kate-4.14.3/work/kate-4.14.3_build/addons/kate/pate/sip
-I/var/tmp/portage/kde-apps/kate-4.14.3/work/kate-4.14.3/addons/kate/pate/sip
-I/var/tmp/portage/kde-apps/kate-4.14.3/work/kate-4.14.3_build
-I/var/tmp/portage/kde-apps/kate-4.14.3/work/kate-4.14.3/kate/interfaces
-I/var/tmp/portage/kde-apps/kate-4.14.3/work/kate-4.14.3/addons/kate/pate
-I/var/tmp/portage/kde-apps/kate-4.14.3/work/kate-4.14.3/addons/kate/pate/../../../kate
-I/var/tmp/portage/kde-apps/kate-4.14.3/work/kate-4.14.3/addons/kate/pate/../../../kate/interfaces
-I/var/tmp/portage/kde-apps/kate-4.14.3/work/kate-4.14.3/addons/kate/pate/../../../kate/interfaces/kate
-I/usr/include/KDE -I/usr/include/qt4/QtXmlPatterns
-I/usr/include/qt4/QtXml -I/usr/include/qt4/QtWebKit
-I/usr/include/qt4/QtUiTools -I/usr/include/qt4/QtTest
-I/usr/include/qt4/QtSvg -I/usr/include/qt4/QtSql
-I/usr/include/qt4/QtScriptTools -I/usr/include/qt4/QtScript
-I/usr/include/qt4/QtOpenGL -I/usr/include/qt4/QtNetwork
-I/usr/include/qt4/QtDesigner -I/usr/include/qt4/QtDeclarative
-I/usr/include/qt4/QtDBus -I/usr/include/qt4/Qt3Support
-I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore
-I/usr/include/qt4/Qt -I/usr/share/qt4/mkspecs/default
-I/usr/include/qt4 -I/usr/include/python3.4m -I/usr/include/solid
-I/usr/include/kio -I/usr/include/dom -I/usr/include/ksettings
-DQT_NO_DEBUG -DNDEBUG -march=sandybridge -O2 -pipe
-Wnon-virtual-dtor -Wno-long-long -Wundef -Wcast-align
-Wchar-subscripts -Wall -W -Wpointer-arith -Wformat-security
-fno-exceptions -DQT_NO_EXCEPTIONS -fno-check-new -fno-common
-Woverloaded-virtual -fno-threadsafe-statics -fvisibility=hidden
-fvisibility-inlines-hidden -fPIC   -D_GNU_SOURCE
-D_LARGEFILE64_SOURCE -o
CMakeFiles/python_module_PyKate4_kate.dir/kate/sipkatepart0.o -c
/var/tmp/portage/kde-apps/kate-4.14.3/work/kate-4.14.3_build/addons/kate/pate/sip/kate/sipkatepart0.cpp

Thanks,
Davide