[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.

16 files changed, 40 insertions, 40 deletions

diff --git a/plugins/btauto/dune b/plugins/btauto/dune
index d2f5b65980..f7b3477460 100644
--- a/plugins/btauto/dune
+++ b/plugins/btauto/dune
@@ -1,7 +1,7 @@
 (library
  (name btauto_plugin)
- (public_name coq.plugins.btauto)
+ (public_name coq-core.plugins.btauto)
  (synopsis "Coq's btauto plugin")
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (coq.pp (modules g_btauto))
diff --git a/plugins/cc/dune b/plugins/cc/dune
index f7fa3adb56..ee28148c5a 100644
--- a/plugins/cc/dune
+++ b/plugins/cc/dune
@@ -1,7 +1,7 @@
 (library
  (name cc_plugin)
- (public_name coq.plugins.cc)
+ (public_name coq-core.plugins.cc)
  (synopsis "Coq's congruence closure plugin")
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (coq.pp (modules g_congruence))
diff --git a/plugins/derive/dune b/plugins/derive/dune
index 1931339471..d382031a58 100644
--- a/plugins/derive/dune
+++ b/plugins/derive/dune
@@ -1,7 +1,7 @@
 (library
  (name derive_plugin)
- (public_name coq.plugins.derive)
+ (public_name coq-core.plugins.derive)
  (synopsis "Coq's derive plugin")
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (coq.pp (modules g_derive))
diff --git a/plugins/extraction/dune b/plugins/extraction/dune
index d9d675fe6a..7f2582f84e 100644
--- a/plugins/extraction/dune
+++ b/plugins/extraction/dune
@@ -1,7 +1,7 @@
 (library
  (name extraction_plugin)
- (public_name coq.plugins.extraction)
+ (public_name coq-core.plugins.extraction)
  (synopsis "Coq's extraction plugin")
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (coq.pp (modules g_extraction))
diff --git a/plugins/firstorder/dune b/plugins/firstorder/dune
index 1b05452d8f..0299ca802f 100644
--- a/plugins/firstorder/dune
+++ b/plugins/firstorder/dune
@@ -1,7 +1,7 @@
 (library
  (name ground_plugin)
- (public_name coq.plugins.firstorder)
+ (public_name coq-core.plugins.firstorder)
  (synopsis "Coq's first order logic solver plugin")
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (coq.pp (modules g_ground))
diff --git a/plugins/funind/dune b/plugins/funind/dune
index e594ffbd02..42377f37f4 100644
--- a/plugins/funind/dune
+++ b/plugins/funind/dune
@@ -1,7 +1,7 @@
 (library
  (name recdef_plugin)
- (public_name coq.plugins.funind)
+ (public_name coq-core.plugins.funind)
  (synopsis "Coq's functional induction plugin")
- (libraries coq.plugins.extraction))
+ (libraries coq-core.plugins.extraction))
 
 (coq.pp (modules g_indfun))
diff --git a/plugins/ltac/dune b/plugins/ltac/dune
index 6558ecbfe8..9ec2b10873 100644
--- a/plugins/ltac/dune
+++ b/plugins/ltac/dune
@@ -1,15 +1,15 @@
 (library
  (name ltac_plugin)
- (public_name coq.plugins.ltac)
+ (public_name coq-core.plugins.ltac)
  (synopsis "Coq's LTAC tactic language")
  (modules :standard \ tauto)
- (libraries coq.stm))
+ (libraries coq-core.stm))
 
 (library
  (name tauto_plugin)
- (public_name coq.plugins.tauto)
+ (public_name coq-core.plugins.tauto)
  (synopsis "Coq's tauto tactic")
  (modules tauto)
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (coq.pp (modules extratactics g_tactic  g_rewrite g_eqdecide g_auto g_obligations g_ltac profile_ltac_tactics coretactics g_class extraargs))
diff --git a/plugins/micromega/dune b/plugins/micromega/dune
index 204125ab56..41f894bce3 100644
--- a/plugins/micromega/dune
+++ b/plugins/micromega/dune
@@ -1,24 +1,24 @@
 (library
  (name micromega_plugin)
- (public_name coq.plugins.micromega)
+ (public_name coq-core.plugins.micromega)
  ; be careful not to link the executable to the plugin!
  (modules (:standard \ csdpcert g_zify zify))
  (synopsis "Coq's micromega plugin")
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (executable
  (name csdpcert)
  (public_name csdpcert)
- (package coq)
+ (package coq-core)
  (modules csdpcert)
  (flags :standard -open Micromega_plugin)
- (libraries coq.plugins.micromega))
+ (libraries coq-core.plugins.micromega))
 
 (library
  (name zify_plugin)
- (public_name coq.plugins.zify)
+ (public_name coq-core.plugins.zify)
  (modules g_zify zify)
  (synopsis "Coq's zify plugin")
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (coq.pp (modules g_micromega g_zify))
diff --git a/plugins/nsatz/dune b/plugins/nsatz/dune
index 3b67ab3429..2aaeec2665 100644
--- a/plugins/nsatz/dune
+++ b/plugins/nsatz/dune
@@ -1,7 +1,7 @@
 (library
  (name nsatz_plugin)
- (public_name coq.plugins.nsatz)
+ (public_name coq-core.plugins.nsatz)
  (synopsis "Coq's nsatz solver plugin")
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (coq.pp (modules g_nsatz))
diff --git a/plugins/omega/dune b/plugins/omega/dune
index 0db71ed6fb..a3c9342322 100644
--- a/plugins/omega/dune
+++ b/plugins/omega/dune
@@ -1,7 +1,7 @@
 (library
  (name omega_plugin)
- (public_name coq.plugins.omega)
+ (public_name coq-core.plugins.omega)
  (synopsis "Coq's omega plugin")
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (coq.pp (modules g_omega))
diff --git a/plugins/ring/dune b/plugins/ring/dune
index 080d8c672e..40f310831a 100644
--- a/plugins/ring/dune
+++ b/plugins/ring/dune
@@ -1,7 +1,7 @@
 (library
  (name ring_plugin)
- (public_name coq.plugins.ring)
+ (public_name coq-core.plugins.ring)
  (synopsis "Coq's ring plugin")
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (coq.pp (modules g_ring))
diff --git a/plugins/rtauto/dune b/plugins/rtauto/dune
index 43efa0eca5..a13f063550 100644
--- a/plugins/rtauto/dune
+++ b/plugins/rtauto/dune
@@ -1,7 +1,7 @@
 (library
  (name rtauto_plugin)
- (public_name coq.plugins.rtauto)
+ (public_name coq-core.plugins.rtauto)
  (synopsis "Coq's rtauto plugin")
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (coq.pp (modules g_rtauto))
diff --git a/plugins/ssr/dune b/plugins/ssr/dune
index a117d09a16..4c28776bb7 100644
--- a/plugins/ssr/dune
+++ b/plugins/ssr/dune
@@ -1,9 +1,9 @@
 (library
  (name ssreflect_plugin)
- (public_name coq.plugins.ssreflect)
+ (public_name coq-core.plugins.ssreflect)
  (synopsis "Coq's ssreflect plugin")
  (modules_without_implementation ssrast)
  (flags :standard -open Gramlib)
- (libraries coq.plugins.ssrmatching))
+ (libraries coq-core.plugins.ssrmatching))
 
 (coq.pp (modules ssrvernac ssrparser))
diff --git a/plugins/ssrmatching/dune b/plugins/ssrmatching/dune
index 629d723816..efaa09c939 100644
--- a/plugins/ssrmatching/dune
+++ b/plugins/ssrmatching/dune
@@ -1,7 +1,7 @@
 (library
  (name ssrmatching_plugin)
- (public_name coq.plugins.ssrmatching)
+ (public_name coq-core.plugins.ssrmatching)
  (synopsis "Coq ssrmatching plugin")
- (libraries coq.plugins.ltac))
+ (libraries coq-core.plugins.ltac))
 
 (coq.pp (modules g_ssrmatching))
diff --git a/plugins/ssrsearch/dune b/plugins/ssrsearch/dune
index 2851835eae..a38bec496f 100644
--- a/plugins/ssrsearch/dune
+++ b/plugins/ssrsearch/dune
@@ -1,7 +1,7 @@
 (library
  (name ssrsearch_plugin)
- (public_name coq.plugins.ssrsearch)
+ (public_name coq-core.plugins.ssrsearch)
  (synopsis "Deprecated Search command from SSReflect")
- (libraries coq.plugins.ssreflect))
+ (libraries coq-core.plugins.ssreflect))
 
 (coq.pp (modules g_search))
diff --git a/plugins/syntax/dune b/plugins/syntax/dune
index ba53a439a0..b00242be1a 100644
--- a/plugins/syntax/dune
+++ b/plugins/syntax/dune
@@ -1,15 +1,15 @@
 (library
  (name number_string_notation_plugin)
- (public_name coq.plugins.number_string_notation)
+ (public_name coq-core.plugins.number_string_notation)
  (synopsis "Coq number and string notation plugin")
  (modules g_number_string string_notation number)
- (libraries coq.vernac))
+ (libraries coq-core.vernac))
 
 (library
  (name float_syntax_plugin)
- (public_name coq.plugins.float_syntax)
+ (public_name coq-core.plugins.float_syntax)
  (synopsis "Coq syntax plugin: float")
  (modules float_syntax)
- (libraries coq.vernac))
+ (libraries coq-core.vernac))
 
 (coq.pp (modules g_number_string))