gnu: Add ocaml-bin-prot.

* gnu/packages/ocaml.scm (ocaml-bin-prot): New variable.

gnu/packages/ocaml.scm

@@ -5354,3 +5354,37 @@ (define-public ocaml-ppx-custom-printf
     (description "Extensions to printf-style format-strings for user-defined
 string conversion.")
     (license license:asl2.0)))
+
+(define-public ocaml-bin-prot
+  (package
+    (name "ocaml-bin-prot")
+    (version "0.11.0")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://ocaml.janestreet.com/ocaml-core/v"
+                                  (version-major+minor version)
+                                  "/files/bin_prot-v" version ".tar.gz"))
+              (sha256
+               (base32
+                "1rsd91gx36prj4whi76nsiz1bzpgal9nzyw3pxdz1alv4ilk2il6"))))
+    (build-system dune-build-system)
+    (inputs
+      `(("ocaml-base" ,ocaml-base)
+        ("ocaml-ppx-compare" ,ocaml-ppx-compare)
+        ("ocaml-ppx-custom-printf" ,ocaml-ppx-custom-printf)
+        ("ocaml-ppx-fields-conv" ,ocaml-ppx-fields-conv)
+        ("ocaml-ppx-sexp-conv" ,ocaml-ppx-sexp-conv)
+        ("ocaml-ppx-variants-conv" ,ocaml-ppx-variants-conv)
+        ("ocaml-migrate-parsetree" ,ocaml-migrate-parsetree)))
+    (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))))