buildworld failure

[Daniel C. Sobral]

Mike Jakubik wrote:
> 
> 	I think the impact is more social. People will try to compile world and get
> failures. Specially people coming from the 4.x branch, where this sort of
> think never occurred. If this is the only thing preventing a clean makeworld
> with -O2, I think its worth taking a look at.

It is not true "this sort of thing" never occurred. We have never, ever, 
supported anything above -O because it has always given trouble.

> 	I've been using freebsd since the 2.x days, I have always compiled world
> and ports with -O2, and never had any instability issues due to the
> optimizations. I have switched back to -O and -march=pentium4, the
> buildworld finished ok.

Lucky you. It does happen that these optimizations may result in code 
with no apparent problem, depending on one's hardware, though I suspect 
many people's "hardware problems" were nothing of the sort.

-- 
Daniel C. Sobral                   (8-DCS)
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