gnu: Add cyclone.

* gnu/packages/scheme.scm (cyclone): New variable.

Change-Id: Icf3890ded917b728177c2831231e87b52d996532

gnu/packages/scheme.scm

@@ -1295,3 +1295,30 @@ cannot be built directly on a system without Cyclone binaries
 installed.")
     (license expat)))
 
+(define-public cyclone
+  (package
+    ;; the bootstrap compiler and final compiler share most build reqs
+    (inherit cyclone-bootstrap)
+    (name "cyclone")
+    (version "0.36.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/justinethier/cyclone.git")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0qz5sdcnqkvw78gx86k3g1f0di5aqagdxqvzc35j50h1q5kj67z6"))))
+    (native-inputs (list cyclone-bootstrap))
+    (home-page "http://justinethier.github.io/cyclone/")
+    (synopsis "Fast R7RS Scheme-to-C compiler")
+    (description
+     "Cyclone Scheme is a brand-new compiler that allows real-world application
+development using the R7RS Scheme Language standard.
+
+Cyclone's runtime uses Cheney on the MTA to implement full tail recursion,
+continuations, multiple native threads, and generational garbage collection.
+The on-the-fly garbage collector manages the second-generation heap and 
+performs major collections without 'stopping the world'.")
+    (license expat)))