[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.

1 files changed, 1 insertions, 1 deletions

diff --git a/test-suite/misc/coq_environment.sh b/test-suite/misc/coq_environment.sh
index 667d11f89e..6f7b11c8f1 100755
--- a/test-suite/misc/coq_environment.sh
+++ b/test-suite/misc/coq_environment.sh
@@ -16,7 +16,7 @@ EOT
 cp $BIN/coqc .
 cp $BIN/coq_makefile .
 mkdir -p overridden/tools/
-cp $COQLIB/tools/CoqMakefile.in overridden/tools/
+cp $COQLIB/tools/CoqMakefile.in overridden/tools/ || cp $COQLIB/../coq-core/tools/CoqMakefile.in overridden/tools/
 
 unset COQLIB
 N=`./coqc -config | grep COQLIB | grep /overridden | wc -l`