Re: autoconf 2.72/2.73 on RCS

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On 2023-04-03 01:00, Frederic Berat wrote:
It would have been nice to keep these macro around for backward
compatibility. Assuming they are only used by gnulib, they wouldn't
need to be kept for too long.

Fair enough. I installed the attached into Autoconf on savannah, so that one should be able to use bleeding-edge Autoconf on the current RCS release.

This patch uses m4_define rather than AU_DEFUN because _AC_SYS_LARGEFILE_TEST_CODE is defined via m4_define rather than via AC_DEFUN. So the user is not warned that _AC_SYS_LARGEFILE_TEST_INCLUDES is obsolete. I don't know why _AC_SYS_LARGEFILE_TEST_CODE doesn't use AC_DEFUN, so I'll cc this to Zack (who wrote that code) to see whether we can change to AC_DEFUN and AU_DEFUN here.
From 938f2d844515a7cbc8ba3d40d0e57bfce9971969 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@xxxxxxxxxxx>
Date: Mon, 3 Apr 2023 09:12:40 -0700
Subject: [PATCH] Support circa early 2022 Gnulib

Problem reported by Frederic Berat in:
* lib/autoconf/specific.m4 (_AC_SYS_LARGEFILE_TEST_INCLUDES):
Bring back for compatibility with post-2.71, pre-2.73 Gnulib.
 lib/autoconf/specific.m4 | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/autoconf/specific.m4 b/lib/autoconf/specific.m4
index 1b3ee661..521f474e 100644
--- a/lib/autoconf/specific.m4
+++ b/lib/autoconf/specific.m4
@@ -277,6 +277,8 @@ m4_define([_AC_SYS_LARGEFILE_TEST_CODE],
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1]];[]dnl
+# Defined by Autoconf 2.71 and circa 2022 Gnulib unwisely depended on it.
 # -------------------------

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