diff --git a/Bounding_volumes/examples/Approximate_min_ellipsoid_d/CMakeLists.txt b/Bounding_volumes/examples/Approximate_min_ellipsoid_d/CMakeLists.txt
index 90f3a7f6622..00764d546fc 100644
--- a/Bounding_volumes/examples/Approximate_min_ellipsoid_d/CMakeLists.txt
+++ b/Bounding_volumes/examples/Approximate_min_ellipsoid_d/CMakeLists.txt
@@ -12,10 +12,18 @@ if ( CGAL_FOUND )
 
   include_directories (BEFORE "../../include")
 
+  # Use Eigen
+  find_package(Eigen3 3.1.0 QUIET) #(3.1.0 or greater)
+  if (EIGEN3_FOUND)
+    include( ${EIGEN3_USE_FILE} )
+  endif()
+  
   # 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}" )
+    if(NOT (${cppfile} STREQUAL "ellipsoid.cpp") OR EIGEN3_FOUND)
+      create_single_source_cgal_program( "${cppfile}" )
+    endif()
   endforeach()
 
 else()
diff --git a/Bounding_volumes/test/Bounding_volumes/CMakeLists.txt b/Bounding_volumes/test/Bounding_volumes/CMakeLists.txt
index da560c664e8..30daac07fc0 100644
--- a/Bounding_volumes/test/Bounding_volumes/CMakeLists.txt
+++ b/Bounding_volumes/test/Bounding_volumes/CMakeLists.txt
@@ -16,10 +16,18 @@ if ( CGAL_FOUND )
 
   include_directories (BEFORE "../../include")
 
+  # Use Eigen
+  find_package(Eigen3 3.1.0 QUIET) #(3.1.0 or greater)
+  if (EIGEN3_FOUND)
+    include( ${EIGEN3_USE_FILE} )
+  endif()
+  
   # 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}" )
+    if(NOT (${cppfile} STREQUAL "Approximate_min_ellipsoid_d.cpp") OR EIGEN3_FOUND)
+      create_single_source_cgal_program( "${cppfile}" )
+    endif()
   endforeach()
 
 else()
diff --git a/Classification/examples/Classification/CMakeLists.txt b/Classification/examples/Classification/CMakeLists.txt
index b991947625a..d6f2df8c92a 100644
--- a/Classification/examples/Classification/CMakeLists.txt
+++ b/Classification/examples/Classification/CMakeLists.txt
@@ -39,6 +39,16 @@ find_package(TBB QUIET)
 
 find_package(OpenCV QUIET)
 
+# Use Eigen
+find_package(Eigen3 3.1.0 REQUIRED) #(3.1.0 or greater)
+if (NOT EIGEN3_FOUND)
+  message(STATUS "This project requires the Eigen library, and will not be compiled.")
+  return()
+else()
+  include( ${EIGEN3_USE_FILE} )
+endif()
+
+
 # include for local directory
 include_directories( BEFORE include )
 
diff --git a/Generator/examples/Generator/CMakeLists.txt b/Generator/examples/Generator/CMakeLists.txt
index ab607583d10..a2a9ce98fbb 100644
--- a/Generator/examples/Generator/CMakeLists.txt
+++ b/Generator/examples/Generator/CMakeLists.txt
@@ -16,10 +16,20 @@ if ( CGAL_FOUND )
 
   include_directories (BEFORE "../../include")
 
+  # Use Eigen
+  find_package(Eigen3 3.1.0 QUIET) #(3.1.0 or greater)
+  if (EIGEN3_FOUND)
+    include( ${EIGEN3_USE_FILE} )
+  endif()
+  
   # 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}" )
+    if(NOT (${cppfile} STREQUAL "random_points_in_tetrahedral_mesh_3.cpp")
+        OR NOT (${cppfile} STREQUAL "random_points_on_tetrahedral_mesh_3.cpp")
+        OR EIGEN3_FOUND)
+      create_single_source_cgal_program( "${cppfile}" )
+    endif()
   endforeach()
 
 else()
diff --git a/Generator/test/Generator/CMakeLists.txt b/Generator/test/Generator/CMakeLists.txt
index ada6b13c2da..8e8c59d2504 100644
--- a/Generator/test/Generator/CMakeLists.txt
+++ b/Generator/test/Generator/CMakeLists.txt
@@ -16,10 +16,18 @@ if ( CGAL_FOUND )
 
   include_directories (BEFORE "../../include")
 
+  # Use Eigen
+  find_package(Eigen3 3.1.0 QUIET) #(3.1.0 or greater)
+  if (EIGEN3_FOUND)
+    include( ${EIGEN3_USE_FILE} )
+  endif()
+
   # 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}" )
+    if(NOT (${cppfile} STREQUAL "generic_random_test.cpp") OR EIGEN3_FOUND)
+      create_single_source_cgal_program( "${cppfile}" )
+    endif()
   endforeach()
 
 else()
diff --git a/Mesh_3/examples/Mesh_3/CMakeLists.txt b/Mesh_3/examples/Mesh_3/CMakeLists.txt
index 480956dbaf0..40232023833 100644
--- a/Mesh_3/examples/Mesh_3/CMakeLists.txt
+++ b/Mesh_3/examples/Mesh_3/CMakeLists.txt
@@ -39,6 +39,15 @@ if ( CGAL_FOUND )
     endif( LINK_WITH_TBB )
   endif()
   
+  # Use Eigen
+  find_package(Eigen3 3.1.0 REQUIRED) #(3.1.0 or greater)
+  if (NOT EIGEN3_FOUND)
+    message(STATUS "This project requires the Eigen library, and will not be compiled.")
+    return()
+  else()
+    include( ${EIGEN3_USE_FILE} )
+  endif()
+  
  set(VTK_LIBS "")
       find_package(VTK QUIET COMPONENTS vtkImagingGeneral  vtkIOImage NO_MODULE)
       if(VTK_FOUND)
diff --git a/Mesh_3/test/Mesh_3/CMakeLists.txt b/Mesh_3/test/Mesh_3/CMakeLists.txt
index 3a3302cc942..87503909cf4 100644
--- a/Mesh_3/test/Mesh_3/CMakeLists.txt
+++ b/Mesh_3/test/Mesh_3/CMakeLists.txt
@@ -19,6 +19,15 @@ if ( CGAL_FOUND )
   include_directories (BEFORE ../../include)
   include_directories (BEFORE ../../../AABB_tree/include)
 
+  # Use Eigen
+  find_package(Eigen3 3.1.0 REQUIRED) #(3.1.0 or greater)
+  if (NOT EIGEN3_FOUND)
+    message(STATUS "This project requires the Eigen library, and will not be compiled.")
+    return()
+  else()
+    include( ${EIGEN3_USE_FILE} )
+  endif()
+  
   create_single_source_cgal_program( "test_backward_compatibility.cpp" )
   create_single_source_cgal_program( "test_boost_has_xxx.cpp" )
   create_single_source_cgal_program( "test_c3t3.cpp" )
diff --git a/Point_set_shape_detection_3/examples/Point_set_shape_detection_3/CMakeLists.txt b/Point_set_shape_detection_3/examples/Point_set_shape_detection_3/CMakeLists.txt
index 032db9a7f9a..380426c2f72 100644
--- a/Point_set_shape_detection_3/examples/Point_set_shape_detection_3/CMakeLists.txt
+++ b/Point_set_shape_detection_3/examples/Point_set_shape_detection_3/CMakeLists.txt
@@ -23,12 +23,18 @@ if ( CGAL_FOUND )
 
   include_directories (BEFORE "../../include")
 
-  create_single_source_cgal_program( "shape_detection_basic.cpp" )
-  create_single_source_cgal_program( "shape_detection_with_callback.cpp" )
+  # Use Eigen
+  find_package(Eigen3 3.1.0 QUIET) #(3.1.0 or greater)
+  if (EIGEN3_FOUND)
+    include( ${EIGEN3_USE_FILE} )
+    create_single_source_cgal_program( "shape_detection_basic.cpp" )
+    create_single_source_cgal_program( "shape_detection_with_callback.cpp" )
+    create_single_source_cgal_program( "plane_regularization.cpp" )
+  endif()
+
   create_single_source_cgal_program( "efficient_RANSAC_custom_shape.cpp" )
   create_single_source_cgal_program( "efficient_RANSAC_parameters.cpp" )
   create_single_source_cgal_program( "efficient_RANSAC_point_access.cpp" )
-  create_single_source_cgal_program( "plane_regularization.cpp" )
 
 else()