* c.opt: Add -std=c++14.

From-SVN: r208404

gcc/c-family/ChangeLog

+2014-03-07  Jason Merrill  <jason@redhat.com>
+
+	* c.opt: Add -std=c++14.
+
 2014-03-06  Marek Polacek  <polacek@redhat.com>
 
 	PR c/60197

gcc/c-family/c.opt

@@ -1349,15 +1349,18 @@ Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
 
 std=c++11
 C++ ObjC++
-Conform to the ISO 2011 C++ standard (experimental and incomplete support)
+Conform to the ISO 2011 C++ standard
 
 std=c++0x
-C++ ObjC++ Alias(std=c++11)
+C++ ObjC++ Alias(std=c++11) Undocumented
 Deprecated in favor of -std=c++11
 
 std=c++1y
 C++ ObjC++
-Conform to the ISO 201y(7?) C++ draft standard (experimental and incomplete support)
+Conform to the ISO 2014(?) C++ draft standard (experimental and incomplete support)
+
+std=c++14
+C++ ObjC++ Alias(std=c++1y) Undocumented
 
 std=c11
 C ObjC

gcc/doc/invoke.texi

@@ -1722,14 +1722,12 @@ C++ code.
 
 @item c++11
 @itemx c++0x
-The 2011 ISO C++ standard plus amendments.  Support for C++11 is still
-experimental, and may change in incompatible ways in future releases.
+The 2011 ISO C++ standard plus amendments.
 The name @samp{c++0x} is deprecated.
 
 @item gnu++11
 @itemx gnu++0x
-GNU dialect of @option{-std=c++11}. Support for C++11 is still
-experimental, and may change in incompatible ways in future releases.
+GNU dialect of @option{-std=c++11}.
 The name @samp{gnu++0x} is deprecated.
 
 @item c++1y