> >
> > But what would the Autoconf check do? Just AC_MSG_ERROR?
> >
>
> Yup. That way the non-INSTALL readers get educated.
>
> Not sure its worth the effort ...

Could the AC_MSG_ERROR dump a URL to the online archive of the commit
message (or discussion of issue or whatever) about removal or
something similar?  Not sure how much details you can put into the
standard auto-fu.
Jason