[Bug libstdc++/101055] [11/12 Regression] should use __has_cpp_attribute() with __ prefixed/suffixed names

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101055

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this also affects the Intel compiler, as the latest release doesn't
handle [[__no_unique_address__]].