Switching the default for -fabi-version

[Joe Buck]

On Tue, Oct 21, 2003 at 04:24:38PM -0700, Mark Mitchell wrote:
> Since nobody really objected to David Moore's suggestion that we make
> -fabi-version=2 the default, I plan to change the default value of the
> flag on the mainline in the next few days.
> 
> If you object, speak up now!

No objection, though I am still curious as to whether this actually makes
a difference for any actual, widely used source code out there (that is,
does -Wabi report anything for real programs that aren't specially
constructed to tweak ABI bugs?  How often?)