Re: PATCH: Add ifunc attribute

[Paolo Bonzini <bonzini at gnu dot org>]

> > __typeof (foo) *
> > __attribute__ ((ifunc ("foo")))
> > foo_ifunc (void)
> > {
> >  <return address of foo_{1,2,3}>
> > }
> >
> > you could call foo_ifunc if you wish in principle, and the header file only
> > has the prototype of foo as expected.
>
> Since foo_ifunc isn't generated, you can't call foo_ifunc.

So I guess mine is the fourth proposal. :-)  Same as 1, but also 
generate foo_ifunc, for example via an alias.

However, there is an additional catch.  What happens in option 1 if 
foo_ifunc is static?  With mine, foo would not be static but foo_ifunc 
would be.