From 7be7ca7195dc6f4ef3000deabff0d34dfb4aa924 Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Thu, 7 Sep 2023 18:24:28 +0100
Subject: [PATCH] Shut autoconf up.

---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index ca9b9473..020f21e5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,7 +44,7 @@ fi
 # Set up the compiler in two different ways and say yes we may want to install.
 AC_PROG_CC
 AM_PROG_CC_C_O
-AC_PROG_CC_C99
+m4_version_prereq(2.70, [AC_PROG_CC], [AC_PROG_CC_C99])
 AC_PROG_CPP
 AC_PROG_EGREP
 AC_PROG_INSTALL