--- fmtgen/parse.y.orig	2020-06-17 17:42:24.867502000 -0400
+++ fmtgen/parse.y	2020-06-17 17:43:25.898841000 -0400
@@ -2,6 +2,7 @@
  * aegis - project change supervisor
  * Copyright (C) 1991-1994, 1997-1999, 2001-2008, 2012 Peter Miller
  * Copyright (C) 2007 Walter Franzini
+ * Copyright (C) 2020 Aryeh M. Friedman
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,8 +18,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+%define api.prefix {parse_}
 %{
-
 #include <common/ac/ctype.h>
 #include <common/ac/stdio.h>
 #include <common/ac/stdlib.h>
@@ -208,12 +209,12 @@
     trace(("}\n"));
 }
 
+int yyparse(void);
+extern int yylex(void);
 
 void
 parse(const generator::pointer &g, const nstring &definition_file)
 {
-    extern int yyparse(void);
-
     /*
      * initial name is the basename of the definition file
      */