--- a/gcc/doc/cppopts.texi	Fri Feb 12 23:41:23 2010 +0900
+++ b/gcc/doc/cppopts.texi	Mon May 24 12:47:05 2010 +0900
@@ -1,5 +1,5 @@
-@c Copyright (c) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
-@c Free Software Foundation, Inc.
+@c Copyright (c) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
+@c 2010, Free Software Foundation, Inc.
 @c This is part of the CPP and GCC manuals.
 @c For copying conditions, see the file gcc.texi.
 
@@ -374,12 +374,13 @@
 @var{standard}
 may be one of:
 @table @code
-@item iso9899:1990
+@item c90
 @itemx c89
-The ISO C standard from 1990.  @samp{c89} is the customary shorthand for
+@itemx iso9899:1990
+The ISO C standard from 1990.  @samp{c90} is the customary shorthand for
 this version of the standard.
 
-The @option{-ansi} option is equivalent to @option{-std=c89}.
+The @option{-ansi} option is equivalent to @option{-std=c90}.
 
 @item iso9899:199409
 The 1990 C standard, as amended in 1994.
@@ -391,13 +392,21 @@
 The revised ISO C standard, published in December 1999.  Before
 publication, this was known as C9X@.
 
-@item gnu89
+@item c1x
+The next version of the ISO C standard, still under development.
+
+@item gnu90
+@itemx gnu89
 The 1990 C standard plus GNU extensions.  This is the default.
 
 @item gnu99
 @itemx gnu9x
 The 1999 C standard plus GNU extensions.
 
+@item gnu1x
+The next version of the ISO C standard, still under development, plus
+GNU extensions.
+
 @item c++98
 The 1998 ISO C++ standard plus amendments.