Some fixes

.travis.yml

@@ -5,12 +5,10 @@ install: wget https://raw.githubusercontent.com/ocaml/ocaml-ci-scripts/master/.t
 script: bash -ex .travis-opam.sh
 env:
   matrix:
-  - OCAML_VERSION=4.02 # we require >=4.02.2 but this picks 4.02.3
-  - OCAML_VERSION=4.03
-  - OCAML_VERSION=4.04
   - OCAML_VERSION=4.05
   - OCAML_VERSION=4.06
   - OCAML_VERSION=4.07
   - OCAML_VERSION=4.08
+  - OCAML_VERSION=4.09
 os:
   - linux

ppx_deriving.opam

@@ -14,15 +14,14 @@ build: [
   ["dune" "build" "@doc" "-p" name "-j" jobs] {with-doc}
 ]
 depends: [
-  "dune"     {build >= "1.6.3"}
-  "cppo"     {build}
+  "dune"     { >= "1.6.3"}
   "ppxfind"  {build}
   "ocaml-migrate-parsetree"
   "ppx_derivers"
   "ppxlib"  {>= "0.9.0"}
   "result"
   "ounit"      {with-test}
-  "ocaml" {>= "4.04.1"}
+  "ocaml" {>= "4.05.0"}
 ]
 synopsis: "Type-driven code generation for OCaml >=4.04.1"
 description: """

src/api/ppx_deriving.cppo.ml

@@ -1,9 +1,5 @@
 open Ppxlib
 
-#define Attribute_expr(loc_, txt_, payload) { attr_name = \
-                                                { txt = txt_; loc = loc_ }; \
-                                              attr_payload = payload; \
-                                              attr_loc = loc_ }
 #define Attribute_patt(loc_, txt_, payload) { attr_name = \
                                                { txt = txt_; loc = loc_ }; \
                                               attr_payload = payload; \
@@ -301,7 +297,10 @@ end
 let attr_warning expr =
   let loc = !default_loc in
   let structure = {pstr_desc = Pstr_eval (expr, []); pstr_loc = loc} in
-  Attribute_expr(loc, "ocaml.warning", PStr [structure])
+  { attr_name = { txt = "ocaml.warning"; loc; };
+    attr_payload = PStr [structure];
+    attr_loc = loc;
+  }
 
 type quoter = {
   mutable next_id : int;

src_test/api/test_api.cppo.ml

@@ -2,11 +2,7 @@ open Parsetree
 open OUnit2
 
 let string_of_tyvar tyvar =
-#if OCAML_VERSION >= (4, 05, 0)
   tyvar.Location.txt
-#else
-  tyvar
-#endif
 
 let test_free_vars ctxt =
   let loc = !Ast_helper.default_loc in