--without-tail-call-interp actually enables the tail-call interpreter, instead of disabling! #129989
Description
In configure.ac, if the user passes --tail-call-interp in the negative, we set Py_TAIL_CALL_INTERP to 0:
Lines 7027 to 7032 in 1feaecc
However, in ceval_macros.h and bytecodes.c, we check for #ifdef Py_TAIL_CALL_INTERP and #if defined(Py_TAIL_CALL_INTERP), for instance:
Line 76 in 1feaecc
Thus, defining the macro -- even with a value of 0 -- actually enables the feature! I think the consistent behavior (consistent with USE_COMPUTED_GOTOS) is probably to switch the preprocessor guards to #if, instead of #ifdef.