RFC: Removing malloc hooks

[DJ Delorie]

Joseph Myers <joseph@codesourcery.com> writes:
> I don't see where this 2.24 version comes from (but I also don't see 
> anything using this macro).

IIRC my original plan was to remove the hook variables themselves if the
port post-dates this change.  Otherwise, the variables are available to
be set even if they're not used.

But even new ports can use the new dso to re-implement hooks, so it
becomes a question of "do we want the hooks to go away completely" vs
"do we want the hook implementation moved out of libc.so".

Also, yes, I've been working on this patch for a while ;-)