From dd7311cf7b2b417377b1135e48ab8ad135bb1d57 Mon Sep 17 00:00:00 2001
From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Tue, 8 Sep 2020 19:47:59 -0700
Subject: [PATCH] drop compatibility with Yacc, Bison < 3 in HTML parser

This does not change build requirements, as other parsers already require Bison
3. Related to #1806.
---
 lib/common/htmlparse.y | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/common/htmlparse.y b/lib/common/htmlparse.y
index 6e92deeb7..0e07cf6a1 100644
--- a/lib/common/htmlparse.y
+++ b/lib/common/htmlparse.y
@@ -11,6 +11,8 @@
  * Contributors: See CVS logs. Details at http://www.graphviz.org/
  *************************************************************************/
 
+%require "3.0"
+
 %{
 
 #include <common/render.h>
-- 
2.40.0