From f4a9fa6569722ef530fac995dc66ec8b6a3179ce Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Mon, 14 Mar 2016 00:02:42 +0100
Subject: [PATCH] Support incompatible change in Boost 1.60. #3117

---
 xs/src/libslic3r/Point.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/xs/src/libslic3r/Point.hpp b/xs/src/libslic3r/Point.hpp
index af0f59af9..6e057aae3 100644
--- a/xs/src/libslic3r/Point.hpp
+++ b/xs/src/libslic3r/Point.hpp
@@ -119,6 +119,9 @@ namespace boost { namespace polygon {
     template <>
     struct geometry_concept<coord_t> { typedef coordinate_concept type; };
     
+/* Boost.Polygon already defines a specialization for coordinate_traits<long> as of 1.60:
+   https://github.com/boostorg/polygon/commit/0ac7230dd1f8f34cb12b86c8bb121ae86d3d9b97 */
+#if BOOST_VERSION < 106000
     template <>
     struct coordinate_traits<coord_t> {
         typedef coord_t coordinate_type;
@@ -128,6 +131,7 @@ namespace boost { namespace polygon {
         typedef long long coordinate_difference;
         typedef long double coordinate_distance;
     };
+#endif
 
     template <>
     struct geometry_concept<Point> { typedef point_concept type; };