[PyQt] undefined reference to PyProperty_Type

[Phil Thompson]

On Monday 28 April 2008, Tom Brown wrote:
> Hi,
>
> OS: Ubuntu 64bit
> Qt: qt-x11-opensource-src-4.4.0-rc1
> sip: sip-4.7.5-snapshot-20080424
> PyQt: PyQt-x11-gpl-4.4-snapshot-20080427
>
> Qt and sip compiled/installed fine. The PyQt compile produced these
> errors:
>
> ...
> sipQtCorecmodule.o: In function `qtcore_pyqtproperty_traverse':
> sipQtCorecmodule.cpp:(.text+0xb5): undefined reference to
> `PyProperty_Type'
> sipQtCorecmodule.o: In function `func_Q_FLAGS':
> sipQtCorecmodule.cpp:(.text+0x209): undefined reference to
> `_Py_NoneStruct'
> sipQtCorecmodule.o: In function `func_Q_ENUMS':
> sipQtCorecmodule.cpp:(.text+0x2a9): undefined reference to
> `_Py_NoneStruct'
> sipQtCorecmodule.o: In function `func_pyqtRestoreInputHook':
> sipQtCorecmodule.cpp:(.text+0x332): undefined reference to
> `PyOS_InputHook'
> sipQtCorecmodule.cpp:(.text+0x343): undefined reference to
> `_Py_NoneStruct'
> sipQtCorecmodule.o: In function `func_pyqtRemoveInputHook':
> sipQtCorecmodule.cpp:(.text+0x3a2): undefined reference to
> `PyOS_InputHook'
> sipQtCorecmodule.cpp:(.text+0x3b0): undefined reference to
> `_Py_NoneStruct'
> sipQtCorecmodule.o: In function `func_qRemovePostRoutine':
> sipQtCorecmodule.cpp:(.text+0x461): undefined reference to
> `_Py_NoneStruct'
> sipQtCorecmodule.cpp:(.text+0x482): undefined reference to
> `_Py_NoneStruct'
> ...
>
> There were many more errors like these. I did find in the sip change log
> that the build system was modified to remove -Wl,--no-undefined when
> generating a Makefile. Then this change was backed out. Does that have
> anything to do with these errors? Or am I way off target?

That's the problem.

> A google search turned up the same errors for an Ubuntu package for PyQt
> 4.3.1, but no solutions.
>
> Any ideas what I did wrong?

You didn't search the mailing list archives. You need to fix your g++.conf.

Phil