4 files changed, 22 insertions, 27 deletions
diff --git a/src/Contraction/doc/COPYRIGHT b/src/Contraction/doc/COPYRIGHT
index 5b606ac2..61f17f6d 100644
--- a/src/Contraction/doc/COPYRIGHT
+++ b/src/Contraction/doc/COPYRIGHT
@@ -1,18 +1,12 @@
-The files of this directory are part of the Gudhi Library. The Gudhi library
-(Geometric Understanding in Higher Dimensions) is a generic C++ library for
-computational topology.
+The files of this directory are part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
+See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
 
-Author(s):       David Salinas
-Copyright (C) 2015 Inria
+Author(s):       Vincent Rouvreau
 
-This program is free software: you can redistribute it and/or modify it under
-the terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
+Copyright (C) 2015 Inria
 
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+This gives everyone the freedoms to use openFrameworks in any context:
+commercial or non-commercial, public or private, open or closed source.
 
-You should have received a copy of the GNU General Public License along with
-this program.  If not, see <http://www.gnu.org/licenses/>.
+You should have received a copy of the MIT License along with this program.
+If not, see https://opensource.org/licenses/MIT.
+\ No newline at end of file
diff --git a/src/Contraction/example/Rips_contraction.cpp b/src/Contraction/example/Rips_contraction.cpp
index c41a9d94..b5ce06c1 100644
--- a/src/Contraction/example/Rips_contraction.cpp
+++ b/src/Contraction/example/Rips_contraction.cpp
@@ -1,7 +1,5 @@
-/*    This file is part of the Gudhi Library. The Gudhi library
- *    (Geometric Understanding in Higher Dimensions) is a generic C++
- *    library for computational topology.
- *
+/*    This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
+ *    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
  *    Author(s):       David Salinas
  *
  *    Copyright (C) 2014 Inria
diff --git a/src/Contraction/include/gudhi/Edge_contraction.h b/src/Contraction/include/gudhi/Edge_contraction.h
index 5cd024bd..6058d64b 100644
--- a/src/Contraction/include/gudhi/Edge_contraction.h
+++ b/src/Contraction/include/gudhi/Edge_contraction.h
@@ -1,7 +1,5 @@
-/*    This file is part of the Gudhi Library. The Gudhi library
- *    (Geometric Understanding in Higher Dimensions) is a generic C++
- *    library for computational topology.
- *
+/*    This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
+ *    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
  *    Author(s):       David Salinas
  *
  *    Copyright (C) 2014 Inria
diff --git a/src/Contraction/include/gudhi/Skeleton_blocker_contractor.h b/src/Contraction/include/gudhi/Skeleton_blocker_contractor.h
index 7a99548d..c2b3157c 100644
--- a/src/Contraction/include/gudhi/Skeleton_blocker_contractor.h
+++ b/src/Contraction/include/gudhi/Skeleton_blocker_contractor.h
@@ -1,12 +1,11 @@
-/*    This file is part of the Gudhi Library. The Gudhi library
- *    (Geometric Understanding in Higher Dimensions) is a generic C++
- *    library for computational topology.
- *
+/*    This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
+ *    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
  *    Author(s):       David Salinas
  *
  *    Copyright (C) 2014 Inria
  *
  *    Modification(s):
+ *      - 2019/08 Vincent Rouvreau: Fix issue #10 for CGAL
  *      - YYYY/MM Author: Description of the modification
  */
 
@@ -26,8 +25,9 @@
 #include <gudhi/Skeleton_blocker/Skeleton_blocker_complex_visitor.h>
 #include <gudhi/Debug_utils.h>
 
-// todo remove the queue to be independent from cgald
+// todo remove the queue to be independent from cgal
 #include <CGAL/Modifiable_priority_queue.h>
+#include <CGAL/version.h>  // for CGAL_VERSION_NR
 
 #include <boost/scoped_array.hpp>
 #include <boost/scoped_ptr.hpp>
@@ -38,6 +38,11 @@
 #include <utility>  // for pair
 #include <vector>
 
+// 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
+
 namespace Gudhi {
 
 namespace contraction {