On AIX 7.2, the request_mouse_pos function is defined but it seems
the related macros (e.g., MOUSE_X_POS) don't actually work, leading to
undefined variable references at link time. The configure test should
have caught this, but it turns out GCC optimizes out the check.
So configure concludes request_mouse_pos is supported and then later
compilation of programs which use this feature fail to link. Ensure
the macro usage influences the program return value so GCC doesn't
delete it.
-dnl Copyright © 2022 Nick Bowler
+dnl Copyright © 2022, 2024 Nick Bowler
dnl
dnl Macros for probing specific curses library behaviour.
dnl
DX_CHECK_CURSES_GETMOUSE_NCURSES
AS_IF([test x"$dx_cv_curses_have_getmouse_ncurses" != x"yes"],
[DX_CHECK_CURSES_FUNC([request_mouse_pos], [],
- [switch (BUTTON_STATUS(1)) case BUTTON_PRESSED:;])])
+ [switch (BUTTON_STATUS(1)) case BUTTON_PRESSED: return 42;])])
AS_CASE(
[$dx_cv_curses_have_getmouse_ncurses$dx_cv_curses_have_request_mouse_pos],
[*yes*], [AC_DEFINE([HAVE_CURSES_MOUSE_SUPPORT], [1],