http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48110
Mingjie Xing <mingjie.xing at gmail dot com> changed:
What |Removed |Added
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CC| |mingjie.xing at gmail dot com
--- Comment #1 from Mingjie Xing <mingjie.xing at gmail dot com> ---
The document says, "Numbers are assumed to be an optimization level. Strings
that begin with O are assumed to be an optimization option, while other options
are assumed to be used with a -f prefix."
So, it should be __attribute__ ((optimize("Ofast"))).
