Hi,
It sounds like an issue in SWIG which access directly the
PyInterpreterState structure which became opaque in Python 3.8.
SWIG should use PyImport_GetModuleDict() public function instead, to
access PyImport_GetModuleDict(). In short, it returns interp->modules.
Victor
Le mar. 24 sept. 2019 à 14:57, Richard Shaw <hobbes1...@gmail.com> a écrit :
>
> I maintain FreeCAD for Fedora and there appears to have been a change in the
> API for how Python handles thread management in 3.8, specifically
> PyInterpreterState which is giving the the following error when trying to
> build FreeCAD:
>
> In file included from
> /builddir/build/BUILD/FreeCAD-0.18.3/src/Base/swigpyrun.cpp:41:
> /builddir/build/BUILD/FreeCAD-0.18.3/src/Base/swigpyrun.inl: In function
> 'void Swig_python::cleanupSWIG_T(const char*)':
> /builddir/build/BUILD/FreeCAD-0.18.3/src/Base/swigpyrun.inl:75:31: error:
> invalid use of incomplete type 'PyInterpreterState' {aka 'struct _is'}
> 75 | PyObject *modules = interp->modules;
> | ^~
> In file included from /usr/include/python3.8/genobject.h:11,
> from /usr/include/python3.8/Python.h:121,
> from
> /builddir/build/BUILD/FreeCAD-0.18.3/src/Base/PyExport.h:42,
> from
> /builddir/build/BUILD/FreeCAD-0.18.3/src/Base/swigpyrun.cpp:25:
> /usr/include/python3.8/pystate.h:20:8: note: forward declaration of
> 'PyInterpreterState' {aka 'struct _is'}
> 20 | struct _is;
> | ^~~
>
> Any tips?
>
> I can provide a full build log or setup a COPR but it's somewhat difficult
> since I'm building a whole new stack of some dependencies:
>
> Coin3->Coin4 (in review)
> - Which SoQt, SIMVoleon, OpenSceneGraph and Pivy need to be ported to.
> Pyside->PySide2 (which implies Qt4->Qt5)
>
> Thanks,
> Richard
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