Re: head fails to build on SLES 12 (wal_compression=zstd)

I wrote:
> That seems like the appropriate answer to me.  I verified that we
> build cleanly and pass check-world against 1.4.0, and later I'm
> going to set up BF member longfin to use that.

Done ...

> In short, I think we should push Justin's version-check patch,
> and also fix the SGML docs to say that we require zstd >= 1.4.0.

... and done.

            regards, tom lane