From 4aaf49080cfc84c2aa4a271b8dd12e9e9fa8b7bd Mon Sep 17 00:00:00 2001
From: Martin Gieseking <martin.gieseking@uos.de>
Date: Wed, 16 Nov 2016 18:36:09 +0100
Subject: [PATCH] ensure compiling C files with --std=c99

---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 1044096..6a317be 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,8 +17,9 @@ AH_TEMPLATE([TARGET_SYSTEM], [The machine triplet of the target system])
 AC_DEFINE_UNQUOTED([TARGET_SYSTEM], ["$target"])
 
 # Checks for programs.
-AC_PROG_CXX
 AC_PROG_CC
+AC_PROG_CC_C99
+AC_PROG_CXX
 AX_CXX_COMPILE_STDCXX([11], [noext])
 
 AC_PROG_RANLIB