Switching the default for -fabi-version

[Zack Weinberg]

Florian Weimer <fw@deneb.enyo.de> writes:

> The C++ standard library used to use xaddl by default, which isn't
> available on 386.
>
> It was fixed in PR 7926, so it's up to the distributors if they want
> to change the ABI to be 386-compatible or not, I guess.

If I understand the situation correctly, there is an unavoidable
choice between being backward compatible with the i386, and being
genuinely thread safe on a multiprocessor machine.

Personally, I think the latter is preferable.

zw