using atomic builtins

[Benjamin Kosnik]

> > ... and if you search a bit the mailing lists, certainly we discussed a bit
> > the usefulness of adding a builtin macro providing exactly that info. if we
> > cannot change the default i?86 target, that would be definitely very usuful.
> > At some point, I think Richard Guenther even posted a patch essentially
> > complete, then I don't know what happened...
>
> I will re-surrect it (I don't remember what happened to it either) with
> gcc-math work once we get to stage1 again.  

Great.

Thanks for the pointer Paolo, I have found the thread you are talking about:
http://gcc.gnu.org/ml/libstdc++/2005-05/msg00277.html

Ugh. This gets considerably more complicated if -march=x changes
things. We would need some way of detecting that (say) i486 code was
trying to be linked with i386 code....

hmmm...

> First I want to do a BOF on the gcc-math subject in general.

A ha! Yes, well, I'm interested in this (separate) issue as well. I
found the FSF decision most unfortunate.

If you do a BOF at the gcc summit, can you or somebody take notes and
post minutes on the gcc list?

-benjamin