[build] Consolidate stdlib's .v files under a single directory.

Currently, `.v` under the `Coq.` prefix are found in both `theories`
and `plugins`. Usually these two directories are merged by special
loadpath code that allows double-binding of the prefix.

This adds some complexity to the build and loadpath system; and in
particular, it prevents from handling the `Coq.*` prefix in the
simple, `-R theories Coq` standard way.

We thus move all `.v` files to theories, leaving `plugins` as an
OCaml-only directory, and modify accordingly the loadpath / build
infrastructure.

Note that in general `plugins/foo/Foo.v` was not self-contained, in
the sense that it depended on files in `theories` and files in
`theories` depended on it; moreover, Coq saw all these files as
belonging to the same namespace so it didn't really care where they
lived.

This could also imply a performance gain as we now effectively
traverse less directories when locating a library.

See also discussion in #10003

1 files changed, 0 insertions, 32 deletions

diff --git a/plugins/ssr/ssrclasses.v b/plugins/ssr/ssrclasses.v
deleted file mode 100644
index 0ae3f8c6a5..0000000000
--- a/plugins/ssr/ssrclasses.v
+++ /dev/null
@@ -1,32 +0,0 @@
-(************************************************************************)
-(*         *   The Coq Proof Assistant / The Coq Development Team       *)
-(*  v      *   INRIA, CNRS and contributors - Copyright 1999-2019       *)
-(* <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)         *)
-(************************************************************************)
-
-(** #<style> .doc { font-family: monospace; white-space: pre; } </style># **)
-
-(** Compatibility layer for [under] and [setoid_rewrite].
-
- Note: this file does not require [ssreflect]; it is both required by
- [ssrsetoid] and required by [ssrunder].
-
- Redefine [Coq.Classes.RelationClasses.Reflexive] here, so that doing
- [Require Import ssreflect] does not [Require Import RelationClasses],
- and conversely. **)
-
-Section Defs.
-  Context {A : Type}.
-  Class Reflexive (R : A -> A -> Prop) :=
-    reflexivity : forall x : A, R x x.
-End Defs.
-
-Register Reflexive as plugins.ssreflect.reflexive_type.
-Register reflexivity as plugins.ssreflect.reflexive_proof.
-
-Instance eq_Reflexive {A : Type} : Reflexive (@eq A) := @eq_refl A.
-Instance iff_Reflexive : Reflexive iff := iff_refl.