From c97ccd388c5bdcd1b581312408dc17222246f4cf Mon Sep 17 00:00:00 2001
From: Anthony Cowley <acowley@gmail.com>
Date: Fri, 1 Apr 2016 14:06:14 -0400
Subject: [PATCH] qhull: darwin compatibility

The hand-rolled iterator declaration is incompatible with libc++'s, and
clang > 3.5 is stricter about this.

See
<https://lists.freebsd.org/pipermail/freebsd-ports-bugs/2014-December/298242.html>
for another reference to this issue.

The errors that occur are of the form:
reference to 'random_access_iterator_tag' is ambiguous
---
 pkgs/development/libraries/qhull/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/development/libraries/qhull/default.nix b/pkgs/development/libraries/qhull/default.nix
index 76ceb12b401..f98c7bdb97e 100644
--- a/pkgs/development/libraries/qhull/default.nix
+++ b/pkgs/development/libraries/qhull/default.nix
@@ -12,6 +12,11 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = "-DMAN_INSTALL_DIR=share/man/man1 -DDOC_INSTALL_DIR=share/doc/qhull";
 
+  patchPhase = stdenv.lib.optionalString stdenv.isDarwin ''
+    sed -i 's/namespace std { struct bidirectional_iterator_tag; struct random_access_iterator_tag; }/#include <iterator>/' ./src/libqhullcpp/QhullIterator.h
+    sed -i 's/namespace std { struct bidirectional_iterator_tag; struct random_access_iterator_tag; }/#include <iterator>/' ./src/libqhullcpp/QhullLinkedList.h
+  '';
+
   meta = {
     homepage = http://www.qhull.org/;
     description = "Computes the convex hull, Delaunay triangulation, Voronoi diagram and more";