From 82b852916efb5ba3f1d49e0680b8071250c4d71f Mon Sep 17 00:00:00 2001
From: Alexis Ballier <aballier@gentoo.org>
Date: Fri, 14 Jul 2017 00:07:49 +0200
Subject: [PATCH] dev-ml/ppx_deriving: Apply conditional patch, backported from
 upstream, to build with ocaml 4.05

Package-Manager: Portage-2.3.6, Repoman-2.3.2
---
 dev-ml/ppx_deriving/files/ocaml405.patch      | 21 +++++++++++++++++++
 .../ppx_deriving/ppx_deriving-4.1-r1.ebuild   |  1 +
 2 files changed, 22 insertions(+)
 create mode 100644 dev-ml/ppx_deriving/files/ocaml405.patch

diff --git a/dev-ml/ppx_deriving/files/ocaml405.patch b/dev-ml/ppx_deriving/files/ocaml405.patch
new file mode 100644
index 000000000000..6f0a5c56f462
--- /dev/null
+++ b/dev-ml/ppx_deriving/files/ocaml405.patch
@@ -0,0 +1,21 @@
+Index: ppx_deriving-4.1/src/ppx_deriving.cppo.ml
+===================================================================
+--- ppx_deriving-4.1.orig/src/ppx_deriving.cppo.ml
++++ ppx_deriving-4.1/src/ppx_deriving.cppo.ml
+@@ -310,6 +310,7 @@ let free_vars_in_core_type typ =
+       List.map free_in xs |> List.concat
+     | { ptyp_desc = Ptyp_alias (x, name) } -> [name] @ free_in x
+     | { ptyp_desc = Ptyp_poly (bound, x) } ->
++      let bound = List.map (fun x -> x.Location.txt) bound in
+       List.filter (fun y -> not (List.mem y bound)) (free_in x)
+     | { ptyp_desc = Ptyp_variant (rows, _, _) } ->
+       List.map (
+@@ -401,7 +402,7 @@ let binop_reduce x a b =
+   [%expr [%e x] [%e a] [%e b]]
+ 
+ let strong_type_of_type ty =
+-  let free_vars = free_vars_in_core_type ty in
++  let free_vars = List.map Location.mknoloc (free_vars_in_core_type ty) in
+   Typ.force_poly @@ Typ.poly free_vars ty
+ 
+ let derive path pstr_loc item attributes fn arg =
diff --git a/dev-ml/ppx_deriving/ppx_deriving-4.1-r1.ebuild b/dev-ml/ppx_deriving/ppx_deriving-4.1-r1.ebuild
index c0d348838f6c..5adaa541c9c4 100644
--- a/dev-ml/ppx_deriving/ppx_deriving-4.1-r1.ebuild
+++ b/dev-ml/ppx_deriving/ppx_deriving-4.1-r1.ebuild
@@ -24,6 +24,7 @@ DEPEND="${RDEPEND}
 
 src_prepare() {
 	epatch "${FILESDIR}/ocb011.patch"
+	has_version '>=dev-lang/ocaml-4.05_rc' && epatch "${FILESDIR}/ocaml405.patch"
 }
 
 src_compile() {
-- 
2.26.2