[Bug c++/116491] GCC defines macro linux if -std is not set, and does not define otherwise

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116491

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Sergey Markelov from comment #3)
> This is not a duplicate. The macro is defined conditionally, this is not a
> correct behavior.

Yes it is. Please read that one and pr84400 .