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

Justin Pryzby <pryzby(at)telsasoft(dot)com> writes:
> On Thu, Mar 31, 2022 at 11:44:40AM -0400, Tom Lane wrote:
>> In view of 51c0d186d ("Allow parallel zstd compression"), I agree
>> that some clarity about the minimum supported version of zstd
>> seems essential. I don't want to be dealing with threading bugs
>> in ancient zstd versions. However, why do you suggest 1.3.7 in
>> particular?

> That's where I found that ZSTD_CLEVEL_DEFAULT was added, in their git.

> I've just installed a .deb for 1.3.8, and discovered that the APIs used by
> basebackup were considered experimental/nonpublic/static-lib-only until 1.4.0

Indeed. I tried building against 1.3.6 (mainly because it was laying
around) and the error reported by Devrim is just the tip of the iceberg.
With "make -k", I see unknown-symbol failures on

ZSTD_CCtx_setParameter
ZSTD_c_compressionLevel
ZSTD_c_nbWorkers
ZSTD_CCtx_reset
ZSTD_reset_session_only
ZSTD_compressStream2
ZSTD_e_continue
ZSTD_e_end

I wonder whether Robert's ambition to be compatible with old versions
extends that far.

regards, tom lane