gh-109617: fix ncurses incompatibility on macOS with Xcode 15 (#111258)

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
This commit is contained in:
Davide Rizzo 2024-05-04 23:41:47 +02:00 committed by GitHub
parent 291cfa454b
commit 08d169f14a
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5 changed files with 77 additions and 21 deletions

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@ -23,10 +23,16 @@
# endif
#endif
#if !defined(HAVE_CURSES_IS_PAD) && defined(WINDOW_HAS_FLAGS)
/* The following definition is necessary for ncurses 5.7; without it,
some of [n]curses.h set NCURSES_OPAQUE to 1, and then Python
can't get at the WINDOW flags field. */
#if defined(WINDOW_HAS_FLAGS) && defined(__APPLE__)
/* gh-109617, gh-115383: we can rely on the default value for NCURSES_OPAQUE on
most platforms, but not on macOS. This is because, starting with Xcode 15,
Apple-provided ncurses.h comes from ncurses 6 (which defaults to opaque
structs) but can still be linked to older versions of ncurses dynamic
libraries which don't provide functions such as is_pad() to deal with opaque
structs. Setting NCURSES_OPAQUE to 0 is harmless in all ncurses releases to
this date (provided that a thread-safe implementation is not required), but
this might change in the future. This fix might become irrelevant once
support for macOS 13 or earlier is dropped. */
#define NCURSES_OPAQUE 0
#endif
@ -39,7 +45,10 @@
#ifdef HAVE_NCURSES_H
/* configure was checking <curses.h>, but we will
use <ncurses.h>, which has some or all these features. */
#if !defined(WINDOW_HAS_FLAGS) && !(NCURSES_OPAQUE+0)
#if !defined(WINDOW_HAS_FLAGS) && \
(NCURSES_VERSION_PATCH+0 < 20070303 || !(NCURSES_OPAQUE+0))
/* the WINDOW flags field was always accessible in ncurses prior to 20070303;
after that, it depends on the value of NCURSES_OPAQUE. */
#define WINDOW_HAS_FLAGS 1
#endif
#if !defined(HAVE_CURSES_IS_PAD) && NCURSES_VERSION_PATCH+0 >= 20090906