When reducing initial empty rules, Bison parser read an initial

location that is not defined.  This results in garbage, and that
affects Bison's own parser.  Therefore we need (i) to extend Bison
to support a means to initialize this location, and (ii) to use
this CVS Bison to fix CVS Bison's parser.
* src/reader.h, reader.c (epilogue_augment): Remove, replace
with...
* src/muscle_tab.h, src/muscle_tab.c (muscle_code_grow): this.
* src/parse-gram.y: Adjust.
(%initial-action): New.
(%error-verbose): Since we require CVS Bison, there is no reason
not to use it.
* src/scan-gram.l: Adjust.
* src/Makefile.am (YACC): New, to make sure we use our own parser.
* data/yacc.c (yyparse): Use b4_initial_action.

README-cvs

@@ -11,9 +11,11 @@ tools we depend upon:
 
 - Automake 1.7
 
-- Autoconf 2.54
+- Autoconf 2.57
 
-- Gettext 0.11.5
+- Gettext 0.12.1
+
+- CVS Bison itself
 
 Only building the initial full source tree will be a bit painful,
 later, a plain `cvs update -P & make' should be sufficient.
@@ -65,7 +67,7 @@ If you experience problems, I suggest the following:
 
 -----
 
-Copyright (C) 2002 Free Software Foundation, Inc.
+Copyright (C) 2002, 2003 Free Software Foundation, Inc.
 
 This file is part of GNU Bison.