Make examples rely on ppx_deriving

examples/longident_show/dune

 (executable
   (name longident_show)
-  (preprocess (staged_pps override ppx_show))
-  (libraries compiler-libs.common ppx_show.runtime))
+  (preprocess (staged_pps override ppx_deriving.std))
+  (libraries compiler-libs.common))

examples/longident_show/longident_show.ml

@@ -7,7 +7,7 @@ end
 let test () =
   assert (
     Longident.show (Longident.parse "Foo.Bar.baz") =
-    {|Longident.Ldot (Longident.Ldot ((Longident.Lident "Foo"), "Bar"), "baz")|}
+    {|(Longident.Ldot ((Longident.Ldot ((Longident.Lident "Foo"), "Bar")), "baz"))|}
  )
 
 

examples/package_type/dune

 (executable
   (name package_type)
-  (preprocess (staged_pps override ppxlib.metaquot ppx_show))
-  (libraries compiler-libs.common ppx_show.runtime))
+  (preprocess (staged_pps override ppxlib.metaquot ppx_deriving.std))
+  (libraries compiler-libs.common))

examples/ppxlib_ast/dune

 (executable
   (name ppxlib_ast)
-  (preprocess (staged_pps override ppxlib.metaquot ppx_compare))
+  (preprocess (staged_pps override ppxlib.metaquot ppx_deriving.std))
   (libraries compiler-libs.common))
 
 (rule

examples/ppxlib_ast/ppxlib_ast.cppo.ml

@@ -2,8 +2,6 @@
    described in the comments of
    https://github.com/ocaml-ppx/ppxlib/blob/master/ast/ast.ml *)
 
-open Ppx_compare_lib.Builtin
-
 (* "- replacing app [type ...] by [and ...] to make everything one
 recursive block" *)
 [%%recursive
@@ -62,7 +60,7 @@ recursive block" *)
   end
 
   [%%print_rewrite_system]]
-       [@@deriving equal]
+       [@@deriving eq]
 
 let structure_of_string s =
   let lexbuf = Lexing.from_string s in