The `_Py_Sigset_Converter` function is conditionally defined in https://github.com/python/cpython/blob/777b611c8c5676b80898a429f71d28e59bddc49d/Modules/posixmodule.h#L27 if `ifdef HAVE_SIGSET_T` However this function is called unconditionally in https://github.com/python/cpython/blob/777b611c8c5676b80898a429f71d28e59bddc49d/Modules/clinic/signalmodule.c.h#L385 (there are 4 such occurrences), which leads to a compilation error when `HAVE_SIGSET_T` is not set. This is regression in 3.8+ as far as I can tell due to changes in https://github.com/python/cpython/pull/6720 I imagine the solution could be to always define this function but raise an exception if it is called when HAVE_SIGSET_T` is undefined, as done in the following patch: https://github.com/iodide-project/pyodide/blob/fc5495ffdb54a11fd588dc60ba6b8777f90c3724/cpython/patches/0006-fix-Py_Sigset_Converter.patch Would this be acceptable, or is there a better way of handling it? Thanks!

 New changeset dc19e8698327cae3d6274b73c135375955f1d0d0 by Christian Heimes in branch 'main': bpo-41498: Fix build on platforms without sigset_t (GH-29770) https://github.com/python/cpython/commit/dc19e8698327cae3d6274b73c135375955f1d0d0 

 New changeset 632d589afcaac3b8441c8c042a98e1ae452533e0 by Miss Islington (bot) in branch '3.10': [3.10] bpo-41498: Fix build on platforms without sigset_t (GH-29770) (GH-29773) https://github.com/python/cpython/commit/632d589afcaac3b8441c8c042a98e1ae452533e0 

 New changeset 71b414750eee7af98cc3cee3a64c59d48302a17a by Christian Heimes in branch '3.9': [3.9] bpo-41498: Fix build on platforms without sigset_t (GH-29770) (GH-29774) https://github.com/python/cpython/commit/71b414750eee7af98cc3cee3a64c59d48302a17a