ocaml-custom_printf: add initial version (112.24.00) to the system

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

···
+{stdenv, buildOcaml, fetchurl, type_conv, sexplib, pa_ounit}:
+
+buildOcaml rec {
+  name = "custom_printf";
+  version = "112.24.00";
+
+  minimumSupportedOcamlVersion = "4.02";
+
+  src = fetchurl {
+    url = "https://github.com/janestreet/custom_printf/archive/${version}.tar.gz";
+    sha256 = "dad3aface92c53e8fbcc12cc9358c4767cb1cb09857d4819a10ed98eccaca8f9";
+  };
+
+  buildInputs = [ pa_ounit ];
+  propagatedBuildInputs = [ type_conv sexplib ];
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/janestreet/custom_printf;
+    description = "Syntax extension for printf format strings";
+    license = licenses.asl20;
+    maintainers = [ maintainers.ericbmerritt ];
+  };
+}

pkgs/top-level/all-packages.nix

···
 
     csv = callPackage ../development/ocaml-modules/csv { };
 
+    custom_printf = callPackage ../development/ocaml-modules/custom_printf { };
+
     deriving = callPackage ../development/tools/ocaml/deriving { };
 
     dolog = callPackage ../development/ocaml-modules/dolog { };