Re: Raising our compiler requirements for 9.6

On 2015-08-05 11:23:22 -0400, Tom Lane wrote:
> Andres Freund <andres@anarazel.de> writes:
> > I'm ok with that too, although I do like the warning at configure
> > time. I'd go with the template approach due to that, but I don't feel
> > strongly about it.
> 
> Meh.  I did *not* like the way you proposed doing that: it looked far too
> dependent on autoconf internals (the kind that they change regularly).

Hm, I'd actually checked that as_echo worked back till 9.0. But it
doesn't exist in much older releases.

> If you can think of a way of emitting a warning that isn't going to break
> in a future autoconf release, then ok.

echo "$as_me: WARNING: disabling inlining on 32 bit aix due to a bug in xlc" 2>&1

then. That'd have worked back in 7.4 and the worst that'd happen is that
$as_me is empty.