[new release] dune (1.4.0)

CHANGES:

- Do not fail if the output of `ocamlc -config` doesn't include
  `standard_runtime` (ocaml/dune#1326, @diml)

- Let `Configurator.V1.C_define.import` handle negative integers
  (ocaml/dune#1334, @Chris00)

- Re-execute actions when a target is modified by the user inside
  `_build` (ocaml/dune#1343, fix ocaml/dune#1342, @diml)

- Pass `--set-switch` to opam (ocaml/dune#1341, fix ocaml/dune#1337, @diml)

- Fix bad interaction between multi-directory libraries the `menhir`
  stanza (ocaml/dune#1373, fix ocaml/dune#1372, @diml)

- Integration with automatic formatters (ocaml/dune#1252, fix ocaml/dune#1201, @emillon)

- Better error message when using `(self_build_stubs_archive ...)` and
  `(c_names ...)` or `(cxx_names ...)` simultaneously.
  (ocaml/dune#1375, fix ocaml/dune#1306, @nojb)

- Improve name detection for packages when the prefix isn't an actual package
  (ocaml/dune#1361, fix ocaml/dune#1360, @rgrinberg)

- Support for new menhir rules (ocaml/dune#863, fix ocaml/dune#305, @fpottier, @rgrinberg)

- Do not remove flags when compiling compatibility modules for wrapped mode
  (ocaml/dune#1382, fix ocaml/dune#1364, @rgrinberg)

- Fix reason support when using `staged_pps` (ocaml/dune#1384, @charlesetc)

- Add support for `enabled_if` in `rule`, `menhir`, `ocamllex`,
  `ocamlyacc` (ocaml/dune#1387, @diml)

- Exit gracefully when a signal is received (ocaml/dune#1366, @diml)

- Load all defined libraries recursively into utop (ocaml/dune#1384, fix ocaml/dune#1344,
  @rgrinberg)

- Allow to use libraries `bytes`, `result` and `uchar` without `findlib`
  installed (ocaml/dune#1391, @nojb)

packages/dune/dune.1.4.0/opam

@@ -0,0 +1,45 @@
+opam-version: "2.0"
+maintainer: "opensource@janestreet.com"
+authors: ["Jane Street Group, LLC <opensource@janestreet.com>"]
+homepage: "https://github.com/ocaml/dune"
+bug-reports: "https://github.com/ocaml/dune/issues"
+dev-repo: "git+https://github.com/ocaml/dune.git"
+license: "MIT"
+depends: [
+  "ocaml" {>= "4.02"}
+]
+build: [
+  # opam 2 sets OPAM_SWITCH_PREFIX, so we don't need a hardcoded path
+  ["ocaml" "configure.ml" "--libdir" lib] {opam-version < "2"}
+  ["ocaml" "bootstrap.ml"]
+  ["./boot.exe" "--release" "--subst"] {pinned}
+  ["./boot.exe" "--release" "-j" jobs]
+]
+conflicts: [
+  "jbuilder" {!= "transition"}
+  "menhir" { < "20180523" }
+]
+
+synopsis: "Fast, portable and opinionated build system"
+description: """
+dune is a build system that was designed to simplify the release of
+Jane Street packages. It reads metadata from "dune" files following a
+very simple s-expression syntax.
+
+dune is fast, it has very low-overhead and support parallel builds on
+all platforms. It has no system dependencies, all you need to build
+dune and packages using dune is OCaml. You don't need or make or bash
+as long as the packages themselves don't use bash explicitly.
+
+dune supports multi-package development by simply dropping multiple
+repositories into the same directory.
+
+It also supports multi-context builds, such as building against
+several opam roots/switches simultaneously. This helps maintaining
+packages across several versions of OCaml and gives cross-compilation
+for free.
+"""
+url {
+  src: "https://github.com/ocaml/dune/releases/download/1.4.0/dune-1.4.0.tbz"
+  checksum: "md5=412dd255b78d02cd4a813bbb88c91da5"
+}