[PATCH. libstdc++] Use the correct C++14 __cplusplus value (201402L). Added C++1z to the preprocessor.

[Jonathan Wakely]

On 26/08/14 07:11 -0400, Ed Smith-Rowland wrote:
>On 08/26/2014 04:59 AM, Paolo Carlini wrote:
>>Hi,
>>
>>On 08/26/2014 10:56 AM, Rainer Orth wrote:
>>>bits/c++config...
>>>Which won't help users seeing them in the headers.  Maybe the issue
>>>could be avoided by chosing names that make it clear that they are
>>>g++/libstdc++ specific, not generic?
>>Sure, whatever works, the names were tentative, for the cpp idea.
>>
>>Paolo.
>>
>I should have mentioned this thought.
>
>Maybe we could do something more scary like
>
>   __GLIBCXX_CPLUSPLUS_98
>   __GLIBCXX_CPLUSPLUS_11
>   __GLIBCXX_CPLUSPLUS_14

If they're macros defined by the library they should start with
_GLIBCXX (i.e. a single underscore).

>so people won't use them.
>
>The __cplusplus_11 etc. look almost "standard" ;-)

Agreed.