[3.14] gh-135755: Make Py_TAIL_CALL_INTERP macro private (#138981) by vstinner · Pull Request #139120 · python/cpython

lgtm, I think that it is safe to be merged at 3.14, but it's upto @hugovk want or not :)

Define "safe" ;)
It will require us to change how we're building 3.14 internally to avoid losing tail call interpreter.
Admittedly, our build is pretty far from "standard", and the adjustment would be trivial, but if we miss this change and don't adapt how we build, tail call interpreter would be silently turned off and it could be hard to notice, which would be unfortunate.