remove CMP code now that we only support from cmake 3.13

Installation/CMakeLists.txt

@@ -1131,7 +1131,7 @@ You must disable CGAL_ENABLE_CHECK_HEADERS.")
       if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/../${package}/include)
         set(check_pkg_headers_depends "")
         # Then recurse2
-        file(GLOB_RECURSE ${package}_HEADERS
+        file(GLOB_RECURSE ${package}_HEADERS #don't use a hard coded list because the ones for the documented headers is enough.
           RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}/../${package}/include"
           "${CMAKE_CURRENT_SOURCE_DIR}/../${package}/include/CGAL/*.h*")
         list(SORT ${package}_HEADERS)

Installation/cmake/modules/CGAL_CreateSingleSourceCGALProgram.cmake

@@ -57,13 +57,10 @@ function(create_single_source_cgal_program firstfile )
       set(NO_TESTING TRUE)
     endif()
 
-    if(POLICY CMP0064)
+    if(NOT NO_TESTING)
-      # CMake 3.4 or later
+      cgal_add_test(${exe_name})
-      if(NOT NO_TESTING)
+    else()
-        cgal_add_test(${exe_name})
+      cgal_add_test(${exe_name} NO_EXECUTION)
-      else()
-        cgal_add_test(${exe_name} NO_EXECUTION)
-      endif()
     endif()
 
     add_to_cached_list( CGAL_EXECUTABLE_TARGETS ${exe_name} )

Installation/cmake/modules/CGAL_TweakFindBoost.cmake

@@ -25,9 +25,7 @@
 # Boost versions, even if the file FindBoost.cmake is old.
 
 if( NOT CGAL_TweakFindBoost )
-  if(POLICY CMP0077)
+  cmake_policy(SET CMP0077 NEW)
-    cmake_policy(SET CMP0077 NEW)
-  endif()
   if(DEFINED CGAL_Boost_USE_STATIC_LIBS)
     # If the option is loaded from CGALConfig.cmake, use its value as default
     # value.  But the user will still have the choice to change the
@@ -60,7 +58,7 @@ if( NOT CGAL_TweakFindBoost )
 
       list(APPEND CGAL_3RD_PARTY_DEFINITIONS -DBOOST_ALL_DYN_LINK)
       set(CGAL_3RD_PARTY_DEFINITIONS "${CGAL_3RD_PARTY_DEFINITIONS}"
-	CACHE INTERNAL "3rd party definitions for CGAL")
+  CACHE INTERNAL "3rd party definitions for CGAL")
     endif()
   endif()
 

Installation/cmake/modules/CGAL_add_test.cmake

@@ -5,25 +5,6 @@ set(CGAL_add_test_included TRUE)
 
 option(BUILD_TESTING "Build the testing tree." OFF)
 
-if(NOT POLICY CMP0064)
-  # CMake <= 3.3
-  if(BUILD_TESTING)
-    message(WARNING
-      "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()
-  # Add a fake function to avoid CMake errors
-  function(cgal_setup_test_properties)
-  endfunction()
-
-  # Then return, to exit the file
-  return()
-endif()
-
 if(BUILD_TESTING)
   enable_testing()
 endif()
@@ -94,7 +75,7 @@ function(expand_list_with_globbing list_name)
 endfunction()
 
 function(cgal_add_compilation_test exe_name)
-  if(NOT POLICY CMP0064 OR TEST compilation_of__${exe_name})
+  if(TEST compilation_of__${exe_name})
     return()
   endif()
   add_test(NAME "compilation_of__${exe_name}"
@@ -111,15 +92,11 @@ function(cgal_add_compilation_test exe_name)
       COMMAND "${CMAKE_COMMAND}" --build "${CMAKE_BINARY_DIR}" --target "cgal_check_build_system" --config "$<CONFIG>")
     set_property(TEST "check_build_system"
       APPEND PROPERTY LABELS "${PROJECT_NAME}")
-    if(POLICY CMP0066) # cmake 3.7 or later
+    set_property(TEST "check_build_system"
-      set_property(TEST "check_build_system"
+      PROPERTY FIXTURES_SETUP "check_build_system_SetupFixture")
-        PROPERTY FIXTURES_SETUP "check_build_system_SetupFixture")
-    endif()
-  endif()
-  if(POLICY CMP0066) # cmake 3.7 or later
-    set_property(TEST "compilation_of__${exe_name}"
-      APPEND PROPERTY FIXTURES_REQUIRED "check_build_system_SetupFixture")
   endif()
+  set_property(TEST "compilation_of__${exe_name}"
+    APPEND PROPERTY FIXTURES_REQUIRED "check_build_system_SetupFixture")
 endfunction(cgal_add_compilation_test)
 
 option(CGAL_TEST_DRAW_FUNCTIONS "If set, the ctest command will not skip the tests of the draw functions.")
@@ -147,8 +124,7 @@ function(cgal_setup_test_properties test_name)
   get_filename_component(_binary_dir_abs ${CMAKE_CURRENT_BINARY_DIR} ABSOLUTE)
   string(FIND "${_binary_dir_abs}" "${_source_dir_abs}" _search_binary_in_source)
 
-  if(_search_binary_in_source EQUAL "-1"
+  if(_search_binary_in_source EQUAL "-1")
-     AND POLICY CMP0066) # CMake 3.7 or later
     if(NOT TEST ${PROJECT_NAME}_SetupFixture)
       if(ANDROID)
         add_test(NAME ${PROJECT_NAME}_SetupFixture
@@ -260,7 +236,7 @@ function(cgal_add_test exe_name)
     set(test_name "execution___of__${exe_name}")
   endif()
 #  message("  test_name: ${test_name}")
-  if(cgal_add_test_NO_EXECUTION OR NOT POLICY CMP0064 OR TEST ${test_name})
+  if(cgal_add_test_NO_EXECUTION OR TEST ${test_name})
     return()
   endif()
 #  message("Add test ${test_name}")
@@ -303,11 +279,11 @@ function(cgal_add_test exe_name)
         set(ARGS)
         #	  message(STATUS "DEBUG test ${exe_name}")
         foreach(CMD_LINE ${CMD_LINES})
-	  #	    message(STATUS "  command line: ${CMD_LINE}")
+    #	    message(STATUS "  command line: ${CMD_LINE}")
           string(REGEX REPLACE "\#.*" "" CMD_LINE "${CMD_LINE}")
-	  separate_arguments(CMD_LINE_ARGS UNIX_COMMAND ${CMD_LINE})
+          separate_arguments(CMD_LINE_ARGS UNIX_COMMAND ${CMD_LINE})
-	  #	    message(STATUS "  args: ${CMD_LINE_ARGS}")
+    #	    message(STATUS "  args: ${CMD_LINE_ARGS}")
-	  list(APPEND ARGS ${CMD_LINE_ARGS})
+          list(APPEND ARGS ${CMD_LINE_ARGS})
         endforeach()
         expand_list_with_globbing(ARGS)
         set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}

Installation/cmake/modules/list_of_whitelisted_headers.cmake

@@ -34,4 +34,4 @@ set(list_of_whitelisted_headers_txt [=[
 
 ]=])
 
-separate_arguments(example_files UNIX_COMMAND ${list_of_whitelisted_headers_txt})
+separate_arguments(list_of_whitelisted_headers UNIX_COMMAND ${list_of_whitelisted_headers_txt})

Maintenance/infrastructure/gauguin.geometryfactory.com/reference_platforms/x64_Cygwin-Windows10_MSVC2017-Debug-64bits/init.cmake

@@ -20,6 +20,8 @@ SET(WITH_NTL OFF CACHE BOOL "")
 
 SET(WITH_demos ON CACHE BOOL "")
 
+SET(CGAL_HEADER_ONLY ON CACHE BOOL "")
+
 SET(Boost_DIR "C:\\3rdPartyLibs\\boost_master\\install_dir\\lib\\cmake\\Boost-1.71.0" CACHE PATH "")
 
 SET(CGAL_Boost_USE_STATIC_LIBS ON CACHE BOOL "")

Maintenance/infrastructure/gauguin.geometryfactory.com/reference_platforms/x64_Cygwin-Windows10_MSVC2017-Release-64bits/init.cmake

@@ -21,3 +21,5 @@ SET(WITH_MPFR ON CACHE BOOL "")
 SET(WITH_NTL OFF CACHE BOOL "")
 
 SET(WITH_demos ON CACHE BOOL "")
+
+SET(CGAL_HEADER_ONLY ON CACHE BOOL "")