From 0ce1067b18af17a8a7a36b4570814adbbb8e516c Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Fri, 3 Nov 2017 23:45:18 +0000
Subject: [PATCH] ocamlPackages.num: init at 1.1

---
 .../development/ocaml-modules/num/default.nix | 29 +++++++++++++++++++
 pkgs/top-level/ocaml-packages.nix             |  4 +++
 2 files changed, 33 insertions(+)
 create mode 100644 pkgs/development/ocaml-modules/num/default.nix

diff --git a/pkgs/development/ocaml-modules/num/default.nix b/pkgs/development/ocaml-modules/num/default.nix
new file mode 100644
index 000000000000..d46bff5b3d59
--- /dev/null
+++ b/pkgs/development/ocaml-modules/num/default.nix
@@ -0,0 +1,29 @@
+{ stdenv, fetchFromGitHub, fetchpatch, ocaml, findlib }:
+
+stdenv.mkDerivation rec {
+	version = "1.1";
+	name = "ocaml${ocaml.version}-num-${version}";
+	src = fetchFromGitHub {
+		owner = "ocaml";
+		repo = "num";
+		rev = "v${version}";
+		sha256 = "0a4mhxgs5hi81d227aygjx35696314swas0vzy3ig809jb7zq4h0";
+	};
+
+	patches = [ (fetchpatch {
+			url = "https://github.com/ocaml/num/commit/6d4c6d476c061298e6385e8a0864f083194b9307.patch";
+			sha256 = "18zlvb5n327q8y3c52js5dvyy29ssld1l53jqng8m9w1k24ypi0b";
+		})
+	];
+
+	buildInputs = [ ocaml findlib ];
+
+	createFindlibDestdir = true;
+
+	meta = {
+		description = "Legacy Num library for arbitrary-precision integer and rational arithmetic";
+		license = stdenv.lib.licenses.lgpl21;
+		inherit (ocaml.meta) platforms;
+		inherit (src.meta) homepage;
+	};
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index d41d5b97f183..a56343713fe2 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -387,6 +387,10 @@ let
       lwt = ocaml_lwt;
     };
 
+    num = if lib.versionOlder "4.06" ocaml.version
+      then callPackage ../development/ocaml-modules/num {}
+      else null;
+
     ocaml_batteries = callPackage ../development/ocaml-modules/batteries { };
 
     comparelib = callPackage ../development/ocaml-modules/comparelib { };