Noah Misch <> writes:
> On Wed, Mar 15, 2017 at 10:57:15AM -0400, Tom Lane wrote:
>> Seems like the correct solution is to
>> absorb that fix, either by updating to a newer autoconf release or by
>> carrying our own version of AC_CHECK_DECLS until they come out with one.

> As you mention upthread, that Autoconf commit is still newer than every
> Autoconf release.  (Last release was 58 months ago.)  Altering to
> work around the bug would be reasonable, but it feels heavy relative to the
> benefit of suppressing some warnings.

It does seem like rather a lot of work, but I think it's preferable to
hacking up the coding in port.h.  Mainly because we could booby-trap the
substitute AC_CHECK_DECLS to make sure we revert it whenever autoconf 2.70
does materialize (a check on m4_PACKAGE_VERSION, like the one at line 22, ought to do the trick); whereas I do not think
we'd remember to de-kluge port.h if we kluge around it there.

I'm fine with leaving it alone, too.

                        regards, tom lane

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