[stm] Make toplevels standalone executables.

We turn coqtop "plugins" into standalone executables, which will be
installed in `COQBIN` and located using the standard `PATH`
mechanism. Using dynamic linking for `coqtop` customization didn't
make a lot of sense, given that only one of such "plugins" could be
loaded at a time. This cleans up some code and solves two problems:

- `coqtop` needing to locate plugins,
- dependency issues as plugins in `stm` depended on files in `toplevel`.

In order to implement this, we do some minor cleanup of the toplevel
API, making it functional, and implement uniform build rules. In
particular:

- `stm` and `toplevel` have become library-only directories,
- a new directory, `topbin`, contains the new executables,
- 4 new binaries have been introduced, for coqide and the stm.
- we provide a common and cleaned up way to locate toplevels.

1 files changed, 0 insertions, 34 deletions

diff --git a/toplevel/coqtop_byte_bin.ml b/toplevel/coqtop_byte_bin.ml
deleted file mode 100644
index 0b65cebbb..000000000
--- a/toplevel/coqtop_byte_bin.ml
+++ /dev/null
@@ -1,34 +0,0 @@
-(************************************************************************)
-(*         *   The Coq Proof Assistant / The Coq Development Team       *)
-(*  v      *   INRIA, CNRS and contributors - Copyright 1999-2018       *)
-(* <O___,, *       (see CREDITS file for the list of authors)           *)
-(*   \VV/  **************************************************************)
-(*    //   *    This file is distributed under the terms of the         *)
-(*         *     GNU Lesser General Public License Version 2.1          *)
-(*         *     (see LICENSE file for the text of the license)         *)
-(************************************************************************)
-
-let drop_setup () =
-  begin try
-    (* Enable rectypes in the toplevel if it has the directive #rectypes *)
-    begin match Hashtbl.find Toploop.directive_table "rectypes" with
-      | Toploop.Directive_none f -> f ()
-      | _ -> ()
-    end
-    with
-    | Not_found -> ()
-  end;
-  let ppf = Format.std_formatter in
-  Mltop.(set_top
-           { load_obj = (fun f -> if not (Topdirs.load_file ppf f)
-                          then CErrors.user_err Pp.(str ("Could not load plugin "^f))
-                        );
-             use_file = Topdirs.dir_use ppf;
-             add_dir  = Topdirs.dir_directory;
-             ml_loop  = (fun () -> Toploop.loop ppf);
-           })
-
-(* Main coqtop initialization *)
-let _ =
-  drop_setup ();
-  Coqtop.start()