[Bug c++/69549] Named Address Spaces does not compile in C++

["redi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69549

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-03-27
     Ever confirmed|0                           |1

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Thiago Macieira from comment #0)
> It works in C:
> 
> $ cat test.c
> __seg_gs char * ptr;
> $ gcc -c test.c && echo Success
> Success

It's documenbted as being a feature in GNU C, and it doesn't say it's also
supported for C++.

> But not in C++:
> 
> $ gcc -xc++ -c test.c
> test.c:1:1: error: ‘__seg_gs’ does not name a type
> 
> Even though it's advertised as supported:
> 
> $ gcc -xc++ -dM -E /dev/null | grep SEG_GS       
> #define __SEG_GS 1

That seems persuasive. Either the macro shouldn't be defined or it should be
supported.