From 87a8d7962ea13f11e591462ec5757e9e1747dc07 Mon Sep 17 00:00:00 2001
From: ROUVREAU Vincent <vincent.rouvreau@inria.fr>
Date: Tue, 20 Aug 2019 17:05:13 +0200
Subject: Fix issue #10 and modify main and installation documentations
 accordingly

---
 src/Tangential_complex/include/gudhi/Tangential_complex.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src/Tangential_complex/include/gudhi/Tangential_complex.h')

diff --git a/src/Tangential_complex/include/gudhi/Tangential_complex.h b/src/Tangential_complex/include/gudhi/Tangential_complex.h
index b3bac58e..f59476b1 100644
--- a/src/Tangential_complex/include/gudhi/Tangential_complex.h
+++ b/src/Tangential_complex/include/gudhi/Tangential_complex.h
@@ -5,6 +5,7 @@
  *    Copyright (C) 2016 Inria
  *
  *    Modification(s):
+ *      - 2019/08 Vincent Rouvreau: Fix issue #10 for CGAL and Eigen3
  *      - YYYY/MM Author: Description of the modification
  */
 
@@ -29,9 +30,11 @@
 #include <CGAL/Delaunay_triangulation.h>
 #include <CGAL/Combination_enumerator.h>
 #include <CGAL/point_generators_d.h>
+#include <CGAL/version.h>  // for CGAL_VERSION_NR
 
 #include <Eigen/Core>
 #include <Eigen/Eigen>
+#include <Eigen/src/Core/util/Macros.h>  // for EIGEN_VERSION_AT_LEAST
 
 #include <boost/optional.hpp>
 #include <boost/iterator/transform_iterator.hpp>
@@ -62,6 +65,15 @@
 
 // #define GUDHI_TC_EXPORT_NORMALS // Only for 3D surfaces (k=2, d=3)
 
+// Make compilation fail - required for external projects - https://github.com/GUDHI/gudhi-devel/issues/10
+#if CGAL_VERSION_NR < 1041101000
+# error Alpha_complex_3d is only available for CGAL >= 4.11
+#endif
+
+#if !EIGEN_VERSION_AT_LEAST(3,1,0)
+# error Alpha_complex_3d is only available for Eigen3 >= 3.1.0 installed with CGAL
+#endif
+
 namespace sps = Gudhi::spatial_searching;
 
 namespace Gudhi {
-- 
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