From c59819311c6e15d6c807fcfb294e9b3600a79407 Mon Sep 17 00:00:00 2001
From: Florent Becker <florent.becker@ens-lyon.org>
Date: Mon, 21 Jul 2014 11:27:09 +0200
Subject: [PATCH] =?UTF-8?q?Make=20x11=C2=A0optionnal=20for=20ocaml?=
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---
 pkgs/development/compilers/ocaml/4.01.0.nix | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/compilers/ocaml/4.01.0.nix b/pkgs/development/compilers/ocaml/4.01.0.nix
index 48966fc2866..0f8ed7deaa4 100644
--- a/pkgs/development/compilers/ocaml/4.01.0.nix
+++ b/pkgs/development/compilers/ocaml/4.01.0.nix
@@ -1,9 +1,12 @@
-{ stdenv, fetchurl, ncurses, buildEnv, libX11, xproto }:
+{ stdenv, fetchurl, ncurses, buildEnv, libX11, xproto,
+  useX11 ? (!stdenv.isArm && !stdenv.isMips) }:
 
 let
-   useX11 = !stdenv.isArm && !stdenv.isMips;
    useNativeCompilers = !stdenv.isMips;
    inherit (stdenv.lib) optionals optionalString;
+   x11Ok = if useX11 && (!stdenv.isArm && !stdenv.isMips)
+           then throw "x11 not available in ocaml with arm or mips arch"
+           else true;
 in
 
 stdenv.mkDerivation rec {