[build] Split stdlib to it's own opam package.

We introduce a new package structure for Coq:

- `coq-core`: Coq's OCaml tools code and plugins
- `coq-stdlib`: Coq's stdlib [.vo files]
- `coq`: meta-package that pulls `coq-{core,stdlib}`

This has several advantages, in particular it allows to install Coq
without the stdlib which is useful in several scenarios, it also open
the door towards a versioning of the stdlib at the package level.

The main user-visible change is that Coq's ML development files now
live in `$lib/coq-core`, for compatibility in the regular build we
install a symlink and support both setups for a while.

Note that plugin developers and even `coq_makefile` should actually
rely on `ocamlfind` to locate Coq's OCaml libs as to be more robust.

There is a transient state where we actually look for both
`$coqlib/plugins` and `$coqlib/../coq-core/plugins` as to support
the non-ocamlfind plus custom variables.

This will be much improved once #13617 is merged (which requires this
PR first), then, we will introduce a `coq.boot` library so finally
`coqdep`, `coqchk`, etc... can share the same path setup code.

IMHO the plan should work fine.

3 files changed, 27 insertions, 27 deletions

diff --git a/dev/dune b/dev/dune
index ae801f9e83..9da06a3fab 100644
--- a/dev/dune
+++ b/dev/dune
@@ -1,11 +1,11 @@
 (library
  (name top_printers)
- (public_name coq.top_printers)
+ (public_name coq-core.top_printers)
  (synopsis "Coq's Debug Printers")
  (wrapped false)
  (modules top_printers)
  (optional)
- (libraries coq.toplevel coq.plugins.ltac))
+ (libraries coq-core.toplevel coq-core.plugins.ltac))
 
 (rule
   (targets dune-dbg)
@@ -17,27 +17,27 @@
     ; We require all the OCaml libs to be in place and searchable
     ; by OCamlfind, this is a bit of a hack but until Dune gets
     ; proper ocamldebug support we have to live with that.
-    %{lib:coq.config:config.cma}
-    %{lib:coq.clib:clib.cma}
-    %{lib:coq.lib:lib.cma}
-    %{lib:coq.kernel:kernel.cma}
-    %{lib:coq.vm:byterun.cma}
-    %{lib:coq.vm:../../stublibs/dllbyterun_stubs.so}
-    %{lib:coq.library:library.cma}
-    %{lib:coq.engine:engine.cma}
-    %{lib:coq.pretyping:pretyping.cma}
-    %{lib:coq.gramlib:gramlib.cma}
-    %{lib:coq.interp:interp.cma}
-    %{lib:coq.proofs:proofs.cma}
-    %{lib:coq.parsing:parsing.cma}
-    %{lib:coq.printing:printing.cma}
-    %{lib:coq.tactics:tactics.cma}
-    %{lib:coq.vernac:vernac.cma}
-    %{lib:coq.stm:stm.cma}
-    %{lib:coq.sysinit:sysinit.cma}
-    %{lib:coq.toplevel:toplevel.cma}
-    %{lib:coq.plugins.ltac:ltac_plugin.cma}
-    %{lib:coq.top_printers:top_printers.cmi}
-    %{lib:coq.top_printers:top_printers.cma}
-    %{lib:coq.top_printers:../META})
+    %{lib:coq-core.config:config.cma}
+    %{lib:coq-core.clib:clib.cma}
+    %{lib:coq-core.lib:lib.cma}
+    %{lib:coq-core.kernel:kernel.cma}
+    %{lib:coq-core.vm:byterun.cma}
+    %{lib:coq-core.vm:../../stublibs/dllbyterun_stubs.so}
+    %{lib:coq-core.library:library.cma}
+    %{lib:coq-core.engine:engine.cma}
+    %{lib:coq-core.pretyping:pretyping.cma}
+    %{lib:coq-core.gramlib:gramlib.cma}
+    %{lib:coq-core.interp:interp.cma}
+    %{lib:coq-core.proofs:proofs.cma}
+    %{lib:coq-core.parsing:parsing.cma}
+    %{lib:coq-core.printing:printing.cma}
+    %{lib:coq-core.tactics:tactics.cma}
+    %{lib:coq-core.vernac:vernac.cma}
+    %{lib:coq-core.stm:stm.cma}
+    %{lib:coq-core.sysinit:sysinit.cma}
+    %{lib:coq-core.toplevel:toplevel.cma}
+    %{lib:coq-core.plugins.ltac:ltac_plugin.cma}
+    %{lib:coq-core.top_printers:top_printers.cmi}
+    %{lib:coq-core.top_printers:top_printers.cma}
+    %{lib:coq-core.top_printers:../META})
   (action (copy dune-dbg.in dune-dbg)))
diff --git a/dev/shim/dune b/dev/shim/dune
index 8006c629ed..e4cc7699f0 100644
--- a/dev/shim/dune
+++ b/dev/shim/dune
@@ -26,7 +26,7 @@
  (targets coqbyte-prelude)
  (deps
   %{bin:coqtop.byte}
-  %{lib:coq.kernel:../../stublibs/dllbyterun_stubs.so}
+  %{lib:coq-core.kernel:../../stublibs/dllbyterun_stubs.so}
   %{project_root}/theories/Init/Prelude.vo)
  (action
   (with-stdout-to %{targets}
diff --git a/dev/tools/coqdev.el b/dev/tools/coqdev.el
index 5f9f326750..d4f599484f 100644
--- a/dev/tools/coqdev.el
+++ b/dev/tools/coqdev.el
@@ -33,7 +33,7 @@
 
 (defun coqdev-default-directory ()
   "Return the Coq repository containing `default-directory'."
-  (let ((dir (locate-dominating-file default-directory "META.coq.in")))
+  (let ((dir (locate-dominating-file default-directory "META.coq-core.in")))
     (when dir (expand-file-name dir))))
 
 (defun coqdev-setup-compile-command ()