Marko Kreen <markokr(at)gmail(dot)com> writes:
>> -1 ... why would you think that a conditional substitution is trouble?
>> We have plenty of others.
> Because it required touching autoconf. ;)
> So now I did it. I hope it was that simple.
Applied with minor adjustments --- notably, I didn't agree with removing
the special-case error messages for platforms that lack support for
this.
regards, tom lane