Unable to Build pandas with Py38, macOS (clang?) and Cython>0.29.13 (tp_print warning)

[WillAyd]

Dedicated issue for @jbrockmendel callout in #30609 (comment)

I opened an issue on the Cython side as well cython/cython#3474

There's a rabbit hole of conversation with this going back to CPython . This may just be a temporary issue for Py38, so one "workaround" could be to just add -Wno-deprecated-declaration when these particular combination of things is detected, though of course an actual fix would be ideal

[TomAugspurger]

After reading through the linked issues and BPOs I'm not sure that simply silencing this warning on macOS is the way to go. I'll do some more research, but for now I'm working around it with by setting CFLAGS='-Wno-error=deprecated-declarations' when compiling.