gnu: cppzmq: Update to 4.6.0.

* gnu/packages/networking.scm (cppzmq): Update to 4.6.0.
[arguments]: Add #:configure-flags.

gnu/packages/networking.scm

@@ -23,7 +23,7 @@
 ;;; Copyright © 2018 Tonton <tonton@riseup.net>
 ;;; Copyright © 2018 Clément Lassieur <clement@lassieur.org>
 ;;; Copyright © 2018 Theodoros Foradis <theodoros@foradis.org>
-;;; Copyright © 2018 Marius Bakke <mbakke@fastmail.com>
+;;; Copyright © 2018, 2020 Marius Bakke <mbakke@fastmail.com>
 ;;; Copyright © 2018, 2020 Oleg Pykhalov <go.wigust@gmail.com>
 ;;; Copyright © 2018 Pierre Neidhardt <mail@ambrevar.xyz>
 ;;; Copyright © 2019 Maxim Cournoyer <maxim.cournoyer@gmail.com>
@@ -342,23 +342,25 @@ between different versions of ØMQ.")
     (license license:mpl2.0)))
 
 (define-public cppzmq
-  (let ((revision "0")
-        (commit "d9f0f016c07046742738c65e1eb84722ae32d7d4"))
   (package
     (name "cppzmq")
-      (version (string-append "4.2.2-" revision "."
-                              (string-take commit 7)))
+    (version "4.6.0")
     (source (origin
               (method git-fetch)
               (uri (git-reference
                     (url "https://github.com/zeromq/cppzmq")
-                      (commit commit)))
+                    (commit (string-append "v" version))))
               (sha256
                (base32
-                  "1gmqlm00y6xpa5m6d4ajq3ww63n2w7h4sy997wj81vcqmqx45b1f"))
-                (file-name (string-append name "-" version "-checkout"))))
+                "19acx2bzi4n6fdnfgkja1nds7m1bwg8lw5vfcijrx9fv75pa7m8h"))
+              (file-name (git-file-name name version))))
     (build-system cmake-build-system)
-      (arguments '(#:tests? #f)) ; No tests.
+    (arguments
+     '(;; FIXME: The test suite requires downloading Catch and custom
+       ;; CMake targets, and refuses to use the system version.
+       ;; See <https://github.com/zeromq/cppzmq/issues/334>.
+       #:tests? #f
+       #:configure-flags '("-DCPPZMQ_BUILD_TESTS=OFF")))
     (native-inputs
      `(("pkg-config" ,pkg-config)))
     (inputs
@@ -368,7 +370,7 @@ between different versions of ØMQ.")
     (description
      "This package provides header-only C++ bindings for ØMQ.  The header
 files contain direct mappings of the abstractions provided by the ØMQ C API.")
-      (license license:expat))))
+    (license license:expat)))
 
 (define-public librdkafka
   (package