From b7b12cfa10a38a121c1ea099beb25a835d06637e Mon Sep 17 00:00:00 2001
From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Tue, 15 Sep 2020 18:24:23 -0700
Subject: [PATCH] drop compatibility with Yacc, Bison < 3 in gml parser

Other parsers in the tree, e.g. lib/cgraph/grammar.y, already require Bison 3+,
so this does not change build requirements. Related to #1806.
---
 cmd/tools/gmlparse.y | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cmd/tools/gmlparse.y b/cmd/tools/gmlparse.y
index 47644d705..b3dd1b899 100644
--- a/cmd/tools/gmlparse.y
+++ b/cmd/tools/gmlparse.y
@@ -11,6 +11,8 @@
  * Contributors: See CVS logs. Details at http://www.graphviz.org/
  *************************************************************************/
 
+%require "3.0"
+
 %{
 #include <stdlib.h>
 #include <stddef.h>
-- 
2.50.1