Add a hint for ppx rewriters that are not compatible

Signed-off-by: Jeremie Dimino <jdimino@janestreet.com>
ocaml · Jun 5, 2018 · 84f1f9b · 84f1f9b
1 parent 898a2ff
commit 84f1f9b
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/preprocessing.ml b/src/preprocessing.ml
@@ -198,7 +198,9 @@ let no_driver_error pps =
   | None ->
     sprintf
       "No ppx driver found.\n\
-       It seems that these ppx rewriters are not compatible with jbuilder."
+       It seems that these ppx rewriters are not compatible with Dune.\n\
+       Hint: Examples of ppx rewriters that are compatible with Dune are\n\
+       ones using ocaml-migrate-parsetree, ppxlib or ppx_driver."
 
 let build_ppx_driver sctx ~lib_db ~dep_kind ~target ~dir_kind pps =
   let ctx = SC.context sctx in