From 9c350f2c474aeacfc5ca83faefa8bcc79b8a36fb Mon Sep 17 00:00:00 2001
From: Laurent Rineau <laurent.rineau@cgal.org>
Date: Mon, 20 Nov 2017 10:41:44 +0100
Subject: [PATCH] Fix CMake errors in CGAL demos, with CMake<3.4

---
 Installation/cmake/modules/CGAL_add_test.cmake | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Installation/cmake/modules/CGAL_add_test.cmake b/Installation/cmake/modules/CGAL_add_test.cmake
index d4a0162944a..79bef011112 100644
--- a/Installation/cmake/modules/CGAL_add_test.cmake
+++ b/Installation/cmake/modules/CGAL_add_test.cmake
@@ -10,6 +10,12 @@ if(NOT POLICY CMP0064)
       "CGAL CTest support requires CMake 3.4 or later.\n"
       "You must either disable BUILD_TESTING or upgrade CMake.")
   endif()
+
+  # Add a fake function to avoid CMake errors
+  function(cgal_add_compilation_test)
+  endfunction()
+
+  # Then return, to exit the file
   return()
 endif()