Peter Eisentraut <peter.eisentraut@enterprisedb.com> writes:
>> On Wed, Oct 13, 2021 at 12:50:38PM -0400, Robert Haas wrote:
>>> Would it be reasonable to consider something similar for the control
>>> file, for the benefit of distributions that are not the same on disk?
> The catalog version already serves this purpose.
We already have fields in pg_control for that, and fields to check
endianness, maxalign, etc, ie the things that matter for data storage.
Perhaps there is a need for more such fields, but I don't see that
extension ABI questions are directly related.
regards, tom lane