https://github.com/krb5/krb5/commit/d864d740d019fdf2c640460f2aa2760c7fa4d5e9 (rebased)

From d864d740d019fdf2c640460f2aa2760c7fa4d5e9 Mon Sep 17 00:00:00 2001
From: Julien Rische <jrische@redhat.com>
Date: Thu, 17 Nov 2022 15:01:24 +0100
Subject: [PATCH] Fix aclocal.m4 syntax error for autoconf 2.72

An incorrect closure inside KRB5_AC_INET6 is innocuous with autoconf
versions up to 2.71, but will cause an error at configure time with
the forthcoming autoconf 2.72.

[ghudson@mit.edu: added more context to commit message]

ticket: 9077 (new)
tags: pullup
target_version: 1.20-next
target_version: 1.19-next
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -193,8 +193,8 @@ AC_TRY_COMPILE([
   struct sockaddr_in6 in;
   AF_INET6;
   IN6_IS_ADDR_LINKLOCAL (&in.sin6_addr);
-],krb5_cv_inet6=yes,krb5_cv_inet6=no)])
-fi
+],[krb5_cv_inet6=yes],[krb5_cv_inet6=no])
+fi])
 AC_MSG_RESULT($krb5_cv_inet6)
 if test "$krb5_cv_inet6" = no && test "$ac_cv_func_inet_ntop" = yes; then
 AC_MSG_CHECKING(for IPv6 compile-time support with -DINET6)