Description
There's no urgency since 3.8 isn't going to be released for a while.
/home/nic/src/cython/Cython/Plex/Scanners.c:6643:104: warning: implicit declaration of function ‘_PyGC_FINALIZED’; did you mean ‘_Py_IS_ALIGNED’? [-Wimplicit-function-declaration]
if (unlikely(PyType_HasFeature(Py_TYPE(o), Py_TPFLAGS_HAVE_FINALIZE) && Py_TYPE(o)->tp_finalize) && !_PyGC_FINALIZED(o)) {
The missing symbol (actually a manifest constant) is _PyGC_FINALIZED.
The Python devs have been reorganizing the API to separate the officlal API from the internal one. That manifest constant definition is now protected by #if defined(Py_BUILD_CORE) || defined(Py_BUILD_CORE_BUILTIN) in objimpl.h