gnu: Add c-toxcore.

* gnu/packages/messaging.scm (c-toxcore): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/messaging.scm

@@ -622,6 +622,48 @@ protocols.")
       (license license:gpl3+)
       (home-page "https://tox.chat"))))
 
+;; Some tox clients move to c-toxcore, which seems to be where all the
+;; recent development happens. It is run by the same developers as toxcore,
+;; forked into a group namespace.
+(define-public c-toxcore
+  (package
+    (name "c-toxcore")
+    (version "0.1.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/TokTok/c-toxcore/archive/v"
+                           version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0dybpz44pi0zm8djppjna0r8yh5wvl3l885dv2f1wp5366bk59n3"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("autoconf" ,autoconf)
+       ("automake" ,automake)
+       ("libtool" ,libtool)
+       ("check" ,check)
+       ("pkg-config" ,pkg-config)))
+    (inputs
+     `(("libsodium" ,libsodium)
+       ("opus" ,opus)
+       ("libvpx" ,libvpx)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'autoconf
+           ;; The tarball source is not bootstrapped.
+           (lambda _
+             (zero? (system* "autoreconf" "-vfi")))))
+       #:tests? #f)) ; FIXME: Testsuite fails, needs internet connection.
+    (synopsis "Library for the Tox encrypted messenger protocol")
+    (description
+     "Official fork of the C library implementation of the Tox
+encrypted messenger protocol.")
+    (license license:gpl3+)
+    (home-page "https://tox.chat")))
+
 (define-public utox
   (package
    (name "utox")