From e0b993c90ade912d2ed2db2bb7e9be49360838b5 Mon Sep 17 00:00:00 2001
From: Nick Gasson <nick@nickg.me.uk>
Date: Sun, 27 Sep 2020 20:56:40 +0800
Subject: [PATCH] Explicitly enable C99 mode

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

diff --git a/configure.ac b/configure.ac
index c765ec5..4946066 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,6 +17,7 @@ AM_INIT_AUTOMAKE([1.11 -Wall -Wno-extra-portability color-tests] serial_tests)
 
 # Check for programs
 AC_PROG_CC
+AC_PROG_CC_C99
 AC_PROG_INSTALL
 AC_PROG_AWK
 AC_PROG_LN_S
-- 
2.39.2