[core] [api] Support OCaml 4.08

The changes are large due to `Pervasives` deprecation:

- the `Pervasives` module has been deprecated in favor of `Stdlib`, we
  have opted for introducing a few wrapping functions in `Util` and
  just unqualified the rest of occurrences. We avoid the shims as in
  the previous attempt.

- a bug regarding partial application have been fixed.

- some formatting functions have been deprecated, but previous
  versions don't include a replacement, thus the warning has been
  disabled.

We may want to clean up things a bit more, in particular
w.r.t. modules once we can move to OCaml 4.07 as the minimum required
version.

Note that there is a clash between 4.08.0 modules `Option` and `Int`
and Coq's ones. It is not clear if we should resolve that clash or
not, see PR #10469 for more discussion.

On the good side, OCaml 4.08.0 does provide a few interesting
functionalities, including nice new warnings useful for devs.

1 files changed, 2 insertions, 2 deletions

diff --git a/checker/check.ml b/checker/check.ml
index 2840fc9ad6..ecf84fda9c 100644
--- a/checker/check.ml
+++ b/checker/check.ml
@@ -66,7 +66,7 @@ module LibraryOrdered =
   struct
     type t = DirPath.t
     let compare d1 d2 =
-      Pervasives.compare
+      compare
         (List.rev (DirPath.repr d1)) (List.rev (DirPath.repr d2))
   end
 
@@ -377,7 +377,7 @@ let intern_from_file ~intern_mode (dir, f) =
 let get_deps (dir, f) =
   try LibraryMap.find dir !depgraph
   with Not_found ->
-    let _ = intern_from_file (dir,f) in
+    let _ = intern_from_file ~intern_mode:Dep (dir,f) in
     LibraryMap.find dir !depgraph
 
 (* Read a compiled library and all dependencies, in reverse order.