From d67b99c7e4b3e16adc5dbc637ad67e5795064bdd Mon Sep 17 00:00:00 2001
From: Thomas Adam <thomas.adam@smoothwall.net>
Date: Thu, 23 May 2019 13:09:34 +0100
Subject: [PATCH] configure.ac: add AC_PROC_YACC

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

diff --git a/configure.ac b/configure.ac
index 1e7578ee..514548b5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -658,5 +658,7 @@ CFLAGS="$SAVED_CFLAGS"
 AC_SUBST(AM_LDFLAGS)
 LDFLAGS="$SAVED_LDFLAGS"
 
+AC_PROG_YACC
+
 # autoconf should create a Makefile.
 AC_OUTPUT(Makefile)