On 3/27/23 10:16, Zack Weinberg wrote:
Compatibility with compilers that reject unprototyped function declarations should maybe get a more prominent NEWS entry.
I gave that a shot by installing the attached.
From 5ffc09fca39de051537fbebd7c6c33d5255a520f Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@xxxxxxxxxxx>
Date: Mon, 27 Mar 2023 18:10:36 -0700
Subject: [PATCH] mention prototypes more prominently in NEWS
* NEWS: Mention the function prototype issue early.
(From a suggestion by Zack Weinberg.)
---
NEWS | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/NEWS b/NEWS
index cf01ee21..d64648c6 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,14 @@ GNU Autoconf NEWS - User visible changes.
** Backward incompatibilities
+*** AC_CHECK_FUNC and similar macros now use function prototypes.
+ AC_CHECK_FUNC and and similar macros now use C declarations with
+ function prototypes, a feature introduced in C89. The new approach
+ should work better with C23, which removed the non-prototyped K&R
+ style that AC_CHECK_FUNC previously used. However, this change
+ means Autoconf no longer supports pre-1989 C compilers, as they do
+ not support function prototypes.
+
*** Autoconf now requires perl 5.10 (2007) or later.
Generated 'configure' scripts continue to run without perl.
--
2.39.2
