ocaml-ctypes: add initial version (0.4.1) to the system

pkgs/development/ocaml-modules/ctypes/default.nix

@@ -0,0 +1,32 @@
+{stdenv, buildOcaml, fetchurl, libffi, pkgconfig, ncurses}:
+
+buildOcaml rec {
+  name = "ctypes";
+  version = "0.4.1";
+
+  src = fetchurl {
+    url = "https://github.com/ocamllabs/ocaml-ctypes/archive/${version}.tar.gz";
+    sha256 = "74564e049de5d3c0e76ea284c225cb658ac1a2b483345be1efb9be4b3c1702f5";
+  };
+
+  buildInputs = [ ncurses pkgconfig ];
+  propagatedBuildInputs = [ libffi ];
+
+  hasSharedObjects = true;
+
+  buildPhase =  ''
+     make XEN=false libffi.config ctypes-base ctypes-stubs
+     make XEN=false ctypes-foreign
+  '';
+
+  installPhase =  ''
+    make install XEN=false
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/ocamllabs/ocaml-ctypes;
+    description = "Library for binding to C libraries using pure OCaml";
+    license = licenses.mit;
+    maintainers = [ maintainers.ericbmerritt ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -4134,6 +4134,8 @@ let
 
     custom_printf = callPackage ../development/ocaml-modules/custom_printf { };
 
+    ctypes = callPackage ../development/ocaml-modules/ctypes { };
+
     deriving = callPackage ../development/tools/ocaml/deriving { };
 
     dolog = callPackage ../development/ocaml-modules/dolog { };