From f4cb0d27cc08f490c42a22e646eb73cc7072d54a Mon Sep 17 00:00:00 2001
From: Bo Anderson <mail@boanderson.me>
Date: Mon, 9 Oct 2023 14:21:20 +0100
Subject: [PATCH] gh-109191: Fix build with newer editline (gh-110239)

---
 ...-10-05-11-46-20.gh-issue-109191.imUkVN.rst |  1 +
 Modules/readline.c                            |  2 +-
 configure                                     | 19 +++++++++++++++++++
 configure.ac                                  |  7 +++++++
 pyconfig.h.in                                 |  3 +++
 5 files changed, 31 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Build/2023-10-05-11-46-20.gh-issue-109191.imUkVN.rst

diff --git a/Misc/NEWS.d/next/Build/2023-10-05-11-46-20.gh-issue-109191.imUkVN.rst b/Misc/NEWS.d/next/Build/2023-10-05-11-46-20.gh-issue-109191.imUkVN.rst
new file mode 100644
index 00000000000..27e5df790bc
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2023-10-05-11-46-20.gh-issue-109191.imUkVN.rst
@@ -0,0 +1 @@
+Fix compile error when building with recent versions of libedit.
diff --git a/Modules/readline.c b/Modules/readline.c
index 4b473023c6e..fde552d124b 100644
--- a/Modules/readline.c
+++ b/Modules/readline.c
@@ -446,7 +446,7 @@ readline_set_completion_display_matches_hook_impl(PyObject *module,
        default completion display. */
     rl_completion_display_matches_hook =
         readlinestate_global->completion_display_matches_hook ?
-#if defined(_RL_FUNCTION_TYPEDEF)
+#if defined(HAVE_RL_COMPDISP_FUNC_T)
         (rl_compdisp_func_t *)on_completion_display_matches_hook : 0;
 #else
         (VFunction *)on_completion_display_matches_hook : 0;
diff --git a/configure b/configure
index 7c5fdec4c93..1799323e53b 100755
--- a/configure
+++ b/configure
@@ -24668,6 +24668,25 @@ printf "%s\n" "#define HAVE_RL_APPEND_HISTORY 1" >>confdefs.h
 
 fi
 
+    # in readline as well as newer editline (April 2023)
+    ac_fn_c_check_type "$LINENO" "rl_compdisp_func_t" "ac_cv_type_rl_compdisp_func_t" "
+      #include <stdio.h> /* Must be first for Gnu Readline */
+      #ifdef WITH_EDITLINE
+      # include <editline/readline.h>
+      #else
+      # include <readline/readline.h>
+      # include <readline/history.h>
+      #endif
+
+"
+if test "x$ac_cv_type_rl_compdisp_func_t" = xyes
+then :
+
+printf "%s\n" "#define HAVE_RL_COMPDISP_FUNC_T 1" >>confdefs.h
+
+fi
+
+
 
 
 CFLAGS=$save_CFLAGS
diff --git a/configure.ac b/configure.ac
index 6093afa0926..cafc6df75e6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5999,6 +5999,13 @@ AS_VAR_IF([with_readline], [no], [
       AC_DEFINE([HAVE_RL_APPEND_HISTORY], [1], [Define if readline supports append_history])
     ])
 
+    # in readline as well as newer editline (April 2023)
+    AC_CHECK_TYPE([rl_compdisp_func_t],
+                  [AC_DEFINE([HAVE_RL_COMPDISP_FUNC_T], [1],
+                             [Define if readline supports rl_compdisp_func_t])],
+                  [],
+                  [readline_includes])
+
     m4_undefine([readline_includes])
   ])dnl WITH_SAVE_ENV()
 ])
diff --git a/pyconfig.h.in b/pyconfig.h.in
index 9924a9011ed..f07e677250a 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -983,6 +983,9 @@
 /* Define if you can turn off readline's signal handling. */
 #undef HAVE_RL_CATCH_SIGNAL
 
+/* Define if readline supports rl_compdisp_func_t */
+#undef HAVE_RL_COMPDISP_FUNC_T
+
 /* Define if you have readline 2.2 */
 #undef HAVE_RL_COMPLETION_APPEND_CHARACTER