[PyQt] PyQt / SIP from an embedded Python interpreter

Phil Thompson phil at riverbankcomputing.com
Sat Jun 8 10:00:03 BST 2013

On Fri, 7 Jun 2013 23:44:17 +0200, Johan Thelin
<johan.thelin at pelagicore.com> wrote:
> Hi,
> I've been experimenting with using PyQt and SIP from a Python
> interpreter embedded into a larger C++ application. I do this on Linux
> (Kubuntu 13.04), Qt 5 and PyQt/SIP from last Wednesday (June 5th).
> This gives me an unresolved symbol, _Py_NoneStruct, when importing
> PyQt5.QtCore. However, adding -lpython2.7 to sip and QtCore, it works.
> I guess the import statement does a dlopen, and it fails to resolve
> the symbols, despite them being linked into my host application for
> some odd reason.
> So, to the point. Am I doing something wrong here? Should things just
> work? I've tried the -Wl,-E and -rdynamic, which was what Google
> indicated could help. Alas, no luck with them.

You could look at how the Designer plugin is built as that is doing
something similar.

> If I'm not doing something wrong, do you want my patches to SIP and

Always happy to consider patches.


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