Merge pull request CGAL#1357 from lrineau/CGAL-add_ctest_cont-lrineau

CTest support (cont.)

Author: lrineau

.travis.yml

@@ -1,5 +1,7 @@
 language: cpp
 dist: trusty
+before_install:
+  - sudo add-apt-repository ppa:smspillaz/cmake-2.8.12 -y
 install:
 before_script:
   - mkdir build

Arrangement_on_surface_2/test/Arrangement_on_surface_2/CMakeLists.txt

@@ -4,6 +4,8 @@
 
 project( Arrangement_on_surface_2_ )
 
+enable_testing()
+
 cmake_minimum_required(VERSION 2.8.10)
 
 find_package(CGAL QUIET COMPONENTS Core)
@@ -16,11 +18,19 @@ if ( CGAL_FOUND )
 
   include_directories (BEFORE "../../include")
 
-  # create a target per cppfile
-  file(GLOB cppfiles RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/*.cpp)
-  foreach(cppfile ${cppfiles})
-    create_single_source_cgal_program( "${cppfile}" )
-  endforeach()
+  if(COMMAND target_compile_options)
+    # Since CMake-2.8.12: New CMake script, that defines the targets and
+    # the CTest test cases.
+    include( ${CMAKE_CURRENT_SOURCE_DIR}/cgal_test.cmake )
+  else()
+    # If CMake version is <= 2.8.11, use the usual CMake script.
+
+    # create a target per cppfile
+    file(GLOB cppfiles RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/*.cpp)
+    foreach(cppfile ${cppfiles})
+      create_single_source_cgal_program( "${cppfile}" )
+    endforeach()
+  endif()
 
 else()