gh-111460: restore ncurses widechar support on macOS

[sorcio]

Ncurses wide character support on macOS was broken as an unintended consequence of #94452. It is now built as intended.

• Issue: Restore ncurses widechar support on macOS #111460

[erlend-aasland]

Do you have the bandwidth to review this, @corona10?

[corona10]

This weekend I will try :)

[corona10]

lgtm!

I checked that what kinds of value $have_curses can have from source codes

cpython/configure.ac

Lines 6255 to 6271 in e1a1e32

	AS_VAR_IF([ac_cv_header_ncurses_h], [yes], [
	if test "$ac_sys_system" != "Darwin"; then
	dnl On macOS, there is no separate /usr/lib/libncursesw nor libpanelw.
	PKG_CHECK_MODULES([CURSES], [ncursesw], [
	AC_DEFINE([HAVE_NCURSESW], [1])
	have_curses=ncursesw
	], [
	WITH_SAVE_ENV([
	AC_CHECK_LIB([ncursesw], [initscr], [
	AC_DEFINE([HAVE_NCURSESW], [1])
	have_curses=ncursesw
	CURSES_CFLAGS=${CURSES_CFLAGS-""}
	CURSES_LIBS=${CURSES_LIBS-"-lncursesw"}
	])
	])
	])
	fi

Thanks for catching this.
This PR should be backported

[miss-islington-app]

Thanks @sorcio for the PR, and @corona10 for merging it 🌮🎉.. I'm working now to backport this PR to: 3.12.
🐍🍒⛏🤖

[bedevere-app]

GH-112034 is a backport of this pull request to the 3.12 branch.

[Turakar]

Might it be that a similar fix needs to be applied to the following line:

cpython/configure.ac

Line 6265 in f497525

if test "$ac_sys_system" != "Darwin"; then

It seems to me like this check is equally broken.

[erlend-aasland]

Might it be that a similar fix needs to be applied to the following line:

cpython/configure.ac

Line 6265 in f497525

if test "$ac_sys_system" != "Darwin"; then

It seems to me like this check is equally broken.

Please open a new issue for this.