gnu: Add ocaml-bin-prot.

* gnu/packages/ocaml.scm (ocaml-bin-prot): New variable.
(ocaml4.07-bin-prot): Inherit from it.

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

gnu/packages/ocaml.scm

@@ -5580,9 +5580,44 @@ string conversion.")
        "11b73smf3g3bpd9lg014pr4rx285nk9mnk6g6464ph51jv0sqzhj"))
      (properties `((upstream-name . "ppx_custom_printf"))))))
 
-(define-public ocaml4.07-bin-prot
+(define-public ocaml-bin-prot
   (package
-    (name "ocaml4.07-bin-prot")
+    (name "ocaml-bin-prot")
+    (version "0.14.0")
+    (source
+      (origin
+        (method git-fetch)
+        (uri (git-reference
+               (url "https://github.com/janestreet/bin_prot")
+               (commit (string-append "v" version))))
+        (file-name (git-file-name name version))
+        (sha256
+          (base32 "1qyqbfp4zdc2jb87370cdgancisqffhf9x60zgh2m31kqik8annr"))))
+    (build-system dune-build-system)
+    (propagated-inputs
+      (list ocaml-base
+            ocaml-ppx-compare
+            ocaml-ppx-custom-printf
+            ocaml-ppx-fields-conv
+            ocaml-ppx-optcomp
+            ocaml-ppx-sexp-conv
+            ocaml-ppx-variants-conv))
+    (properties `((upstream-name . "bin_prot")
+                  (ocaml4.07-variant . ,(delay ocaml4.07-bin-prot))))
+    (home-page "https://github.com/janestreet/bin_prot")
+    (synopsis "Binary protocol generator")
+    (description "This library contains functionality for reading and writing
+OCaml-values in a type-safe binary protocol.  It is extremely efficient,
+typically supporting type-safe marshalling and unmarshalling of even highly
+structured values at speeds sufficient to saturate a gigabit connection.  The
+protocol is also heavily optimized for size, making it ideal for long-term
+storage of large amounts of data.")
+    (license license:expat)))
+
+(define-public ocaml4.07-bin-prot
+  (package-with-ocaml4.07
+    (package
+      (inherit ocaml-bin-prot)
       (version "0.11.0")
       (source (origin
                 (method url-fetch)
@@ -5592,32 +5627,16 @@ string conversion.")
                 (sha256
                  (base32
                   "1rsd91gx36prj4whi76nsiz1bzpgal9nzyw3pxdz1alv4ilk2il6"))))
-    (build-system dune-build-system)
+      (propagated-inputs (list ocaml-base
-    (inputs
+                               ocaml-ppx-compare
-      `(("ocaml-base" ,(package-with-ocaml4.07 ocaml-base))
+                               ocaml-ppx-custom-printf
-        ("ocaml-ppx-compare" ,(package-with-ocaml4.07 ocaml-ppx-compare))
+                               ocaml-ppx-fields-conv
-        ("ocaml-ppx-custom-printf" ,(package-with-ocaml4.07 ocaml-ppx-custom-printf))
+                               ocaml-ppx-variants-conv
-        ("ocaml-ppx-fields-conv" ,(package-with-ocaml4.07 ocaml-ppx-fields-conv))
+                               ocaml-migrate-parsetree))
-        ("ocaml-ppx-sexp-conv" ,(package-with-ocaml4.07 ocaml-ppx-sexp-conv))
+      (properties '())
-        ("ocaml-ppx-variants-conv" ,(package-with-ocaml4.07 ocaml-ppx-variants-conv))
-        ("ocaml-migrate-parsetree"
-         ,(package-with-ocaml4.07 ocaml-migrate-parsetree))))
-    (arguments
-     `(#:ocaml ,ocaml-4.07
-       #:findlib ,ocaml4.07-findlib
-       #:dune ,ocaml4.07-dune))
-    (properties `((upstream-name . "bin_prot")))
-    (home-page "https://github.com/janestreet/bin_prot")
-    (synopsis "Binary protocol generator")
-    (description "This library contains functionality for reading and writing
-OCaml-values in a type-safe binary protocol.  It is extremely efficient,
-typically supporting type-safe marshalling and unmarshalling of even highly
-structured values at speeds sufficient to saturate a gigabit connection.  The
-protocol is also heavily optimized for size, making it ideal for long-term
-storage of large amounts of data.")
       (license (list
                  license:asl2.0
-               license:bsd-3))))
+                 license:bsd-3)))))
 
 (define-public ocaml-octavius
   (package