gcc4: missing atomic builtins?

[Andy Koppe]

>  Well, I guess the question is, what's the minimum level of CPU we want to
> support, and I can configure the next version --with-arch that level, and as
> long as it's >=486 we'll be ok.  I think the question is mainly "686, or is
> there any reason to have 586 as the minimum supported CPU"?

Windows 2000 and XP only require 586. Can't imagine many people using
them on a Pentium machine though, and the 686 CMOV instruction would
be nice to have. Also, should -with-tune be set to something recent?

Andy

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