Re: adding 'zstd' as a compression algorithm

On Wed, Feb 16, 2022 at 10:40:01AM -0500, Robert Haas wrote:
> On Tue, Feb 15, 2022 at 9:33 PM Michael Paquier  wrote:
>> Yes, the patch misses the fact that each ./configure switch is
>> documented.  For consistency, I think that you should also add that in
>> the MSVC scripts in the first version.  It is really straight-forward
>> to do so, and it should be just a matter of grepping for the code
>> paths of lz4, then adjust things for zstd.
> 
> Makes sense. Here's an attempt by me to do that.

Thanks.  This looks pretty much right, except for two things that I
have taken the freedom to fix as of the v3 attached.

%define needs to include HAVE_LIBZSTD, HAVE_ZSTD_H and USE_ZSTD, so
this version fails the sanity check between pg_config.h.in and the
MSVC scripts checking that all flags exist.

@@ -351,6 +351,7 @@ XGETTEXT = @XGETTEXT@
 GZIP   = gzip
 BZIP2  = bzip2
 LZ4    = @LZ4@
+ZSTD   = @ZSTD@
A similar refresh is needed in vcregress.pl.

+       $proj->AddLibrary($self->{options}->{zstd} . '\lib\libzstd.lib');
The upstream code is also using this library name, so that should be
fine.
--
Michael