[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.

3 files changed, 9 insertions, 9 deletions

diff --git a/interp/constrextern.ml b/interp/constrextern.ml
index 8573dccdf9..e32ef3fe38 100644
--- a/interp/constrextern.ml
+++ b/interp/constrextern.ml
@@ -69,7 +69,7 @@ let print_no_symbol = ref false
 (* Turning notations and scopes on and off for printing *)
 module IRuleSet = Set.Make(struct
     type t = interp_rule
-    let compare x y = Pervasives.compare x y
+    let compare x y = compare x y
   end)
 
 let inactive_notations_table =
diff --git a/interp/dumpglob.ml b/interp/dumpglob.ml
index dc6a1ae180..0ec8b1e0c8 100644
--- a/interp/dumpglob.ml
+++ b/interp/dumpglob.ml
@@ -12,13 +12,13 @@ open Util
 
 (* Dump of globalization (to be used by coqdoc) *)
 
-let glob_file = ref Pervasives.stdout
+let glob_file = ref stdout
 
 let open_glob_file f =
-  glob_file := Pervasives.open_out f
+  glob_file := open_out f
 
 let close_glob_file () =
-  Pervasives.close_out !glob_file
+  close_out !glob_file
 
 type glob_output_t =
     | NoGlob
@@ -37,7 +37,7 @@ let dump_to_dotglob () = glob_output := MultFiles
 
 let dump_into_file f =
   if String.equal f "stdout" then
-    (glob_output := StdOut; glob_file := Pervasives.stdout)
+    (glob_output := StdOut; glob_file := stdout)
   else
     (glob_output := File f; open_glob_file f)
 
@@ -45,7 +45,7 @@ let feedback_glob () = glob_output := Feedback
 
 let dump_string s =
   if dump () && !glob_output != Feedback then 
-    Pervasives.output_string !glob_file s
+    output_string !glob_file s
 
 let start_dump_glob ~vfile ~vofile =
   match !glob_output with
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)