use api.prefix to set HTML parser's prefix

Related to #1806.

diff --git a/lib/common/htmlparse.y b/lib/common/htmlparse.y
index 0e07cf6a1cc9dd47c79e064de90c348e1e3e5f2e..715aa91f66971814ef1332b44056b1d581a01261 100644 (file)
--- a/lib/common/htmlparse.y
+++ b/lib/common/htmlparse.y
@@ -13,6 +13,12 @@
 
 %require "3.0"
 
+  /* By default, Bison emits a parser using symbols prefixed with "yy". Graphviz
+   * contains multiple Bison-generated parsers, so we alter this prefix to avoid
+   * symbol clashes.
+   */
+%define api.prefix {html}
+
 %{
 
 #include <common/render.h>