python-pyside2 fails to build with Python 3.10.0a2.

[  0%] Building CXX object sources/shiboken2/tests/libminimal/CMakeFiles/libminimal.dir/typedef.cpp.o
cd /builddir/build/BUILD/pyside-setup-opensource-src-5.15.1/x86_64-redhat-linux-gnu/sources/shiboken2/tests/libminimal && /usr/bin/clang++ -DLIBMINIMAL_BUILD -Dlibminimal_EXPORTS -I/builddir/build/BUILD/pyside-setup-opensource-src-5.15.1/sources/shiboken2/tests/libminimal -O2 -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -m64 -mtune=generic -fasynchronous-unwind-tables -fcf-protection -Wall -fvisibility=hidden -Wno-strict-aliasing -D QT_NO_CAST_FROM_ASCII -D QT_NO_CAST_TO_ASCII -DNDEBUG -fPIC   -fPIC -std=gnu++11 -o CMakeFiles/libminimal.dir/typedef.cpp.o -c /builddir/build/BUILD/pyside-setup-opensource-src-5.15.1/sources/shiboken2/tests/libminimal/typedef.cpp
/builddir/build/BUILD/pyside-setup-opensource-src-5.15.1/sources/shiboken2/libshiboken/basewrapper.cpp:369:23: error: expression is not assignable
        Py_TYPE(type) = SbkObjectType_TypeF();
        ~~~~~~~~~~~~~ ^
/builddir/build/BUILD/pyside-setup-opensource-src-5.15.1/sources/shiboken2/libshiboken/basewrapper.cpp:1104:23: error: expression is not assignable
    Py_TYPE(heaptype) = SbkObjectType_TypeF();
    ~~~~~~~~~~~~~~~~~ ^


Since Py_TYPE() is changed to the inline static function, Py_TYPE(obj) = new_type must be replaced with Py_SET_TYPE(obj, new_type): see Py_SET_TYPE() (available since Python 3.9). For backward compatibility, this macro can be used:

#if PY_VERSION_HEX < 0x030900A4
#  define Py_SET_TYPE(obj, type) ((Py_TYPE(obj) = (type)), (void)0)
#endif

https://bugs.python.org/issue39573



For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.10/fedora-rawhide-x86_64/01771284-python-pyside2/

For all our attempts to build python-pyside2 with Python 3.10, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/package/python-pyside2/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.10:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/

Let us know here if you have any questions.

Python 3.10 will be included in Fedora 35. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.10.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.