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Re: -O4?
- To: Weiguang Shi <wgshi at cs dot ualberta dot ca>
- Subject: Re: -O4?
- From: Alexandre Oliva <aoliva at redhat dot com>
- Date: 20 Dec 2000 00:45:25 -0200
- Cc: gcc-help at gcc dot gnu dot org
- Organization: GCC Team, Red Hat
- References: <20001219103712.A13986@nordegg.cs.ualberta.ca>
On Dec 19, 2000, Weiguang Shi <wgshi@cs.ualberta.ca> wrote:
> I got some code where in the makefile the gcc is given the option "-O4". I
> looked it up using "info gcc" but got no explaination on it. The highest
> optimization level I got is "-O3".
> Could you please what it means?
The same as -O3, until we create even more expensive optimizations
that would only be enabled with -O4 or higher :-)
--
Alexandre Oliva Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist *Please* write to mailing lists, not to me