PythonQt build error

[Jithin Pavithran]

Getting following error while building PythonQt:

sudo make all
cd generator/ && make -f Makefile all
make[1]: Entering directory '/usr/local/PythonQt3.1/generator'
make -f Makefile.Release all
make[2]: Entering directory '/usr/local/PythonQt3.1/generator'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/usr/local/PythonQt3.1/generator'
make -f Makefile.Debug all
make[2]: Entering directory '/usr/local/PythonQt3.1/generator'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/usr/local/PythonQt3.1/generator'
make[1]: Leaving directory '/usr/local/PythonQt3.1/generator'
cd src/ && make -f Makefile all
make[1]: Entering directory '/usr/local/PythonQt3.1/src'
g++ -c -m64 -pipe -I/usr/include/python2.7 -I/usr/include/x86_64-linux-gnu/python2.7 -O2 -D_REENTRANT -Wall -W -fPIC -DPYTHONQT_EXPORTS -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I../../../share/qt4/mkspecs/linux-g++-64 -I. -I../../../include/qt4/QtCore -I../../../include/qt4/QtGui -I../../../include/qt4 -I. -I/opt/Qt/5.7/gcc_64/include/QtCore/5.7.0/QtCore -I. -I. -o PythonQt.o PythonQt.cpp
PythonQt.cpp: In static member function ‘static void PythonQt::init(int, const QByteArray&)’:
PythonQt.cpp:258:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i<sizeof(enumValues)/sizeof(int); i++) {
                      ^
In file included from /usr/include/python2.7/Python.h:80:0,
                 from PythonQtPythonInclude.h:59,
                 from PythonQtUtils.h:45,
                 from PythonQt.h:45,
                 from PythonQt.cpp:42:
PythonQt.cpp: In constructor ‘PythonQt::PythonQt(int, const QByteArray&)’:
/usr/include/python2.7/object.h:769:22: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     ((PyObject*)(op))->ob_refcnt++)
                      ^
PythonQt.cpp:306:3: note: in expansion of macro ‘Py_INCREF’
   Py_INCREF(&PythonQtSlotFunction_Type);
   ^
/usr/include/python2.7/object.h:769:22: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     ((PyObject*)(op))->ob_refcnt++)
                      ^
PythonQt.cpp:311:3: note: in expansion of macro ‘Py_INCREF’
   Py_INCREF(&PythonQtSignalFunction_Type);
   ^
/usr/include/python2.7/object.h:769:22: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     ((PyObject*)(op))->ob_refcnt++)
                      ^
PythonQt.cpp:316:3: note: in expansion of macro ‘Py_INCREF’
   Py_INCREF(&PythonQtSlotDecorator_Type);
   ^
/usr/include/python2.7/object.h:769:22: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     ((PyObject*)(op))->ob_refcnt++)
                      ^
PythonQt.cpp:321:3: note: in expansion of macro ‘Py_INCREF’
   Py_INCREF(&PythonQtProperty_Type);
   ^
/usr/include/python2.7/object.h:769:22: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     ((PyObject*)(op))->ob_refcnt++)
                      ^
PythonQt.cpp:327:3: note: in expansion of macro ‘Py_INCREF’
   Py_INCREF(&PythonQtBoolResult_Type);
   ^
/usr/include/python2.7/object.h:769:22: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     ((PyObject*)(op))->ob_refcnt++)
                      ^
PythonQt.cpp:335:3: note: in expansion of macro ‘Py_INCREF’
   Py_INCREF(&PythonQtClassWrapper_Type);
   ^
/usr/include/python2.7/object.h:769:22: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     ((PyObject*)(op))->ob_refcnt++)
                      ^
PythonQt.cpp:342:3: note: in expansion of macro ‘Py_INCREF’
   Py_INCREF(&PythonQtInstanceWrapper_Type);
   ^
/usr/include/python2.7/object.h:769:22: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     ((PyObject*)(op))->ob_refcnt++)
                      ^
PythonQt.cpp:348:3: note: in expansion of macro ‘Py_INCREF’
   Py_INCREF(&PythonQtStdOutRedirectType);
   ^
/usr/include/python2.7/object.h:769:22: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     ((PyObject*)(op))->ob_refcnt++)
                      ^
PythonQt.cpp:354:3: note: in expansion of macro ‘Py_INCREF’
   Py_INCREF(&PythonQtStdInRedirectType);
   ^
PythonQt.cpp: In member function ‘void PythonQtPrivate::buildDynamicMetaObject(PythonQtClassWrapper*, const QMetaObject*)’:
PythonQt.cpp:1953:20: warning: converting to non-pointer type ‘long int’ from NULL [-Wconversion-null]
   Py_ssize_t pos = NULL;
                    ^
PythonQt.cpp:1968:30: warning: variable ‘method’ set but not used [-Wunused-but-set-variable]
           QMetaMethodBuilder method = builder.addSignal(signal->_dynamicInfo->n
                              ^
PythonQt.cpp:1974:7: warning: converting to non-pointer type ‘long int’ from NULL [-Wconversion-null]
   pos = NULL;
       ^
PythonQt.cpp: In member function ‘void PythonQtPrivate::callMethodInPython(QMetaMethod&, PythonQtInstanceWrapper*, void**)’:
PythonQt.cpp:2088:33: error: ‘class QMetaMethod’ has no member named ‘methodSignature’
   QByteArray methodSig = method.methodSignature();
                                 ^
PythonQt.cpp:2089:70: error: ‘class QMetaMethod’ has no member named ‘name’
   PyObject* func = PyObject_GetAttrString((PyObject*)wrapper, method.name());
                                                                      ^
In file included from /usr/include/python2.7/Python.h:133:0,
                 from PythonQtPythonInclude.h:59,
                 from PythonQtUtils.h:45,
                 from PythonQt.h:45,
                 from PythonQt.cpp:42:
PythonQtConversion.h: In instantiation of ‘bool PythonQtConvertPythonToIntegerMap(PyObject*, void*, int, bool) [with MapType = QMap<int, QByteArray>; T = QByteArray; PyObject = _object]’:
PythonQt.cpp:180:5:   required from here
/usr/include/python2.7/abstract.h:1354:47: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
 #define PyMapping_Items(O) PyObject_CallMethod(O,"items",NULL)
                                               ^
PythonQtConversion.h:490:23: note: in expansion of macro ‘PyMapping_Items’
     PyObject* items = PyMapping_Items(val);
                       ^
PythonQtConversion.h: In instantiation of ‘bool PythonQtConvertPythonToIntegerMap(PyObject*, void*, int, bool) [with MapType = QMap<int, QVariant>; T = QVariant; PyObject = _object]’:
PythonQt.cpp:181:5:   required from here
/usr/include/python2.7/abstract.h:1354:47: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
 #define PyMapping_Items(O) PyObject_CallMethod(O,"items",NULL)
                                               ^
PythonQtConversion.h:490:23: note: in expansion of macro ‘PyMapping_Items’
     PyObject* items = PyMapping_Items(val);
                       ^
PythonQtConversion.h: In instantiation of ‘bool PythonQtConvertPythonToIntegerMap(PyObject*, void*, int, bool) [with MapType = QMap<int, QString>; T = QString; PyObject = _object]’:
PythonQt.cpp:182:5:   required from here
/usr/include/python2.7/abstract.h:1354:47: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
 #define PyMapping_Items(O) PyObject_CallMethod(O,"items",NULL)
                                               ^
PythonQtConversion.h:490:23: note: in expansion of macro ‘PyMapping_Items’
     PyObject* items = PyMapping_Items(val);
                       ^
PythonQtConversion.h: In instantiation of ‘bool PythonQtConvertPythonToIntegerMap(PyObject*, void*, int, bool) [with MapType = QHash<int, QByteArray>; T = QByteArray; PyObject = _object]’:
PythonQt.cpp:183:5:   required from here
/usr/include/python2.7/abstract.h:1354:47: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
 #define PyMapping_Items(O) PyObject_CallMethod(O,"items",NULL)
                                               ^
PythonQtConversion.h:490:23: note: in expansion of macro ‘PyMapping_Items’
     PyObject* items = PyMapping_Items(val);
                       ^
PythonQtConversion.h: In instantiation of ‘bool PythonQtConvertPythonToIntegerMap(PyObject*, void*, int, bool) [with MapType = QHash<int, QVariant>; T = QVariant; PyObject = _object]’:
PythonQt.cpp:184:5:   required from here
/usr/include/python2.7/abstract.h:1354:47: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
 #define PyMapping_Items(O) PyObject_CallMethod(O,"items",NULL)
                                               ^
PythonQtConversion.h:490:23: note: in expansion of macro ‘PyMapping_Items’
     PyObject* items = PyMapping_Items(val);
                       ^
PythonQtConversion.h: In instantiation of ‘bool PythonQtConvertPythonToIntegerMap(PyObject*, void*, int, bool) [with MapType = QHash<int, QString>; T = QString; PyObject = _object]’:
PythonQt.cpp:185:5:   required from here
/usr/include/python2.7/abstract.h:1354:47: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
 #define PyMapping_Items(O) PyObject_CallMethod(O,"items",NULL)
                                               ^
PythonQtConversion.h:490:23: note: in expansion of macro ‘PyMapping_Items’
     PyObject* items = PyMapping_Items(val);
                       ^
Makefile:368: recipe for target 'PythonQt.o' failed
make[1]: *** [PythonQt.o] Error 1
make[1]: Leaving directory '/usr/local/PythonQt3.1/src'
Makefile:87: recipe for target 'sub-src-all-ordered' failed
make: *** [sub-src-all-ordered] Error 2

How to fix this?

[Florian Link]

Looks like you try to build against Qt 4.8. The PythonQt snv trunk does not support Qt4 anymore, only Qt5. For PythonQt on Qt 4.8, have a look at the svn braches, there is a branch of the last working version for Qt4