[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, 3 insertions, 3 deletions

diff --git a/interp/notation.ml b/interp/notation.ml
index d58125e29b..ec3fad7f7d 100644
--- a/interp/notation.ml
+++ b/interp/notation.ml
@@ -57,7 +57,7 @@ let pr_notation (from,ntn) = qstring ntn ++ match from with InConstrEntrySomeLev
 module NotationOrd =
   struct
     type t = notation
-    let compare = Pervasives.compare
+    let compare = pervasives_compare
   end
 
 module NotationSet = Set.Make(NotationOrd)
@@ -593,7 +593,7 @@ let rec rawnum_compare s s' =
    try
      for i = 0 to d-1 do if s.[i] != '0' then raise (Comp 1) done;
      for i = d to l-1 do
-       let c = Pervasives.compare s.[i] s'.[i-d] in
+       let c = pervasives_compare s.[i] s'.[i-d] in
        if c != 0 then raise (Comp c)
      done;
      0
@@ -1242,7 +1242,7 @@ type entry_coercion = notation list
 module EntryCoercionOrd =
  struct
   type t = notation_entry * notation_entry
-   let compare = Pervasives.compare
+   let compare = pervasives_compare
  end
 
 module EntryCoercionMap = Map.Make(EntryCoercionOrd)