On 2020-Sep-04, Tom Lane wrote:
> I think that it's standard to test for such symbols by seeing
> if they're defined as macros ... not least because that's the *only*
> way to test their existence in C.
I guess since what we're doing is emulating standard readdir(), that
makes sense.
> Personally, what I'd do is lose the enum and just define the macros
> with simple integer constant values.
WFM.
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