[Bug libstdc++/51785] gets not anymore declared

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51785

--- Comment #18 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-02-28 
18:25:54 UTC ---
Ah, thanks Joseph. Thus, to repeat, anything we do in terms of macros has to be
for *2.16* and later.