Document gcc -Wundef fix.

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index 56edc70744a384955704b848de4d2553d057a9eb..fbb0745a3678ff3831ac2351bdf4d4056963e5e8 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,7 +1,43 @@
 Bison News
 ----------
 
-* Changes in version ?.? (????-??-??):
+* Changes in version 2.4.2 (????-??-??):
+
+** Detection of GNU M4 1.4.6 or newer during configure is improved.
+
+** Warnings from gcc's -Wundef option about undefined YYENABLE_NLS and
+   YYLTYPE_IS_TRIVIAL in C/C++ parsers are now avoided.
+
+** %code is now a permanent feature.
+
+  A traditional Yacc prologue directive is written in the form:
+
+    %{CODE%}
+
+  To provide a more flexible alternative, Bison 2.3b introduced the
+  %code directive with the following forms for C/C++:
+
+    %code          {CODE}
+    %code requires {CODE}
+    %code provides {CODE}
+    %code top      {CODE}
+
+  These forms are now considered permanent features of Bison.  See the
+  %code entries in the section "Bison Declaration Summary" in the Bison
+  manual for a summary of their functionality.  See the section
+  "Prologue Alternatives" for a detailed discussion including the
+  advantages of %code over the traditional Yacc prologue directive.
+
+  Bison's Java feature as a whole including its current usage of %code
+  is still considered experimental.
+
+** Internationalization.
+
+  Fix a regression introduced in Bison 2.4: Under some circumstances,
+  message translations were not installed although supported by the
+  host system.
+
+* Changes in version 2.4.1 (2008-12-11):
 
 ** In the GLR defines file, unexpanded M4 macros in the yylval and yylloc
    declarations have been fixed.
@@ -17,13 +53,12 @@ Bison News
 
     exp: exp "+" exp { $$ = $1 + $3; };
 
-  This prevents the future support for languages than do not use `;'
-  as C/C++/Java do.  Yet some grammars still depend on this `feature'.
-  Bison 2.4.1 restores the previous behavior in the case of C output
-  (specifically, when neither %language or %skeleton or equivalent
-  command-line options are used) to leave more time for grammars
-  depending on the old behavior to be adjusted.  Future releases of
-  Bison will disable this feature.
+  Some grammars still depend on this `feature'.  Bison 2.4.1 restores
+  the previous behavior in the case of C output (specifically, when
+  neither %language or %skeleton or equivalent command-line options
+  are used) to leave more time for grammars depending on the old
+  behavior to be adjusted.  Future releases of Bison will disable this
+  feature.
 
 ** A few minor improvements to the Bison manual.
 
@@ -1050,9 +1085,9 @@ End:
 -----
 
 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
-2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
 
-This file is part of Bison, the GNU Compiler Compiler.
+This file is part of Bison, the GNU Parser Generator.
 
 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