From mboxrd@z Thu Jan  1 00:00:00 1970
From: Leo Famulari <leo@famulari.name>
Subject: Re: [PATCH] Add msgpack
Date: Sat, 11 Jun 2016 20:17:50 -0400
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To: Lukas Gradl <lgradl@openmailbox.org>
Cc: guix-devel@gnu.org

On Sat, Jun 11, 2016 at 06:56:38PM -0500, Lukas Gradl wrote:
> It seems that zlib is only required for tests.  In README and README.md
> zlib is never  mentioned among the dependencies, which also supports
> that it is only needed for tests.  I was not aware of that before (Shame
> on me).

Is zlib really only required for tests? I see this:

$ grep -rIi zlib /gnu/store/xn8z7k6j7zm4qz14bm29fgk0kwwvz3c4-msgpack-1.4.1
/gnu/store/xn8z7k6j7zm4qz14bm29fgk0kwwvz3c4-msgpack-1.4.1/include/msgpack/zbuffer.h:#include <zlib.h>
/gnu/store/xn8z7k6j7zm4qz14bm29fgk0kwwvz3c4-msgpack-1.4.1/include/msgpack/zbuffer.hpp:#include <zlib.h>

So, there are headers in the msgpack output that require zlib.

If you are at the stage where you are using Ring based on these
packages, I wonder if it is not using the part of msgpack that uses
zlib? Or, if it's finding zlib in the environment (if you are on a
foreign distro)?

Or have I misunderstood?