Bug report

Bug description:

readline_set_completion_display_matches_hook_impl will use eitherVFunction (if_RL_FUNCTION_TYPEDEF is defined) orrl_compdisp_func_t. The former is deprecated but available in current readline, while the latter has historically not been available in libedit. However, libedit recently addedrl_compdisp_func_t and removedVFunction entirely:http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libedit/readline/readline.h.diff?r1=1.53&r2=1.54&sortby=date

We ship a recent libedit in MacPorts, so we see a compilation failure like this:

./Modules/readline.c:448:10: error: use of undeclared identifier 'VFunction'; did you mean 'function'?        (VFunction *)on_completion_display_matches_hook : 0;         ^~~~~~~~~

It's easy enough for us to patch around this, but I guess if compatibility with both current libedit and the older version shipped by Apple is desired, there needs to be another check for the availability of this type.

CPython versions tested on:

3.12

Operating systems tested on:

macOS

Linked PRs

• gh-109191: Fix build with newer editline #110239
• [3.12] gh-109191: Fix build with newer editline (gh-110239) #110562
• [3.11] gh-109191: Fix build with newer editline (gh-110239). #110575