[Bug c++/52680] std::this_thread::sleep_for #ifdef'd out by _GLIBCXX_USE_NANOSLEEP

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52680

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-03-31 12:02:43 UTC ---
(In reply to comment #4)
> Where should I specify that flag? _GLIBCXX_USE_NANOSLEEP is still undefined
> when I build gcc with
> 
> configure CFLAGS='-O3' --disable-bootstrap --disable-multilib
> --enable-ibstdccxx-time=rt --enable-languages=c,c++
           ^^^^^^^^^

But what if you spell it correctly?  ;)