Re: [Boost-build] Changing GCC flags for <optimization>speed

From: Jos Hickson (jos.hickson_at_[hidden])
Date: 2007-07-11 07:32:30

[snip]
>
> > One thing I was wonder was why -O3 is the default as that is usually
> > considered a bit risky?
>
> Is it? I'm not aware of that.
>

To quote from the Gentoo Linux "Safe CFLAGS" page
(http://gentoo-wiki.com/Safe_Cflags) as an example:

<quote>
Note that -O2 is regarded as safer than "-O3", and "-O3" can often be
a counter-productive attempt at optimization.
</quote>

Jos