COMP: Update to ITK v6.0 and related package versions.

Author: hjmjohnson

CMakeLists.txt

@@ -10,8 +10,8 @@
 # CMake versions greater than the ITKEX_NEWEST_VALIDATED_POLICIES_VERSION policies will
 # continue to generate policy warnings "CMake Warning (dev)...Policy CMP0XXX is not set:"
 #
-set(ITKEX_OLDEST_VALIDATED_POLICIES_VERSION "3.16.3")
-set(ITKEX_NEWEST_VALIDATED_POLICIES_VERSION "3.19.7")
+set(ITKEX_OLDEST_VALIDATED_POLICIES_VERSION "3.22.1")
+set(ITKEX_NEWEST_VALIDATED_POLICIES_VERSION "3.31.5")
 cmake_minimum_required(VERSION ${ITKEX_OLDEST_VALIDATED_POLICIES_VERSION} FATAL_ERROR)
 if("${CMAKE_VERSION}" VERSION_LESS_EQUAL "${ITKEX_NEWEST_VALIDATED_POLICIES_VERSION}")
   #Set and use the newest available cmake policies that are validated to work
@@ -36,14 +36,14 @@ foreach(pold "") # Currently Empty
 endforeach()
 
 # ==== Define language standard configurations requiring at least c++14 standard
-if(CMAKE_CXX_STANDARD EQUAL "98" OR CMAKE_CXX_STANDARD LESS "14")
-  message(FATAL_ERROR "C++98 to C++11 are no longer supported in ITK version 5.3 and greater.")
+if(CMAKE_CXX_STANDARD EQUAL "98" OR CMAKE_CXX_STANDARD LESS "17")
+  message(FATAL_ERROR "C++98 to C++11 are no longer supported in ITK version v6 and greater.")
 endif()
 
 #####
 ##  Set the default target properties for ITK
 if(NOT CMAKE_CXX_STANDARD)
-  set(CMAKE_CXX_STANDARD 14) # Supported values are ``14``, ``17``, and ``20``.
+  set(CMAKE_CXX_STANDARD 17) # Supported values are ``17``, and ``20``.
 endif()
 if(NOT CMAKE_CXX_STANDARD_REQUIRED)
   set(CMAKE_CXX_STANDARD_REQUIRED ON)
@@ -80,7 +80,7 @@ endif()
 if(NOT ITK_VERSION)
   # To get the ITK version information from external package when building
   # stand alone, ITK is required.
-  find_package(ITK 5.3.0 REQUIRED)
+  find_package(ITK 6.0.0 REQUIRED)
 endif()
 set(ITKSphinxExamples_VERSION_MAJOR ${ITK_VERSION_MAJOR})
 set(ITKSphinxExamples_VERSION_MINOR ${ITK_VERSION_MINOR})
@@ -138,8 +138,8 @@ foreach(link ${content_links})
 endforeach()
 ExternalData_Add_Target(ITKSphinxExamplesData)
 
-set(PYTHON_REQUIRED_VERSION 3.7)
-set(Python_ADDITIONAL_VERSIONS 3.12 3.11 3.10 3.9 3.8 3.7)
+set(PYTHON_REQUIRED_VERSION 3.9)
+set(Python_ADDITIONAL_VERSIONS 3.12 3.11 3.10 3.9)
 if(BUILD_TESTING OR ITK_BUILD_DOCUMENTATION OR ITK_WRAP_PYTHON)
   if(ITK_WRAP_PYTHON)
     # Use the same Python interpreter as ITK to run the tests.

Superbuild/External-ITK.cmake

@@ -2,8 +2,8 @@
 # Get and build itk
 
 if(NOT ITK_TAG)
-  # ITK release 2024-05-22
-  set(ITK_TAG "v5.4.0")
+  # ITK release 2025-01-30
+  set(ITK_TAG "a5dd51be8ae8e3104f15b18202bec53408f70870")
 endif()
 
 set(_vtk_args)

Superbuild/External-Python.cmake

@@ -18,6 +18,6 @@ ExternalProject_Add(ITKPython
   DOWNLOAD_COMMAND ""
   CONFIGURE_COMMAND ${Python3_EXECUTABLE} -m venv "${_itk_venv}"
   BUILD_COMMAND ${ITKPython3_EXECUTABLE} -m pip install --upgrade pip
-  INSTALL_COMMAND ${ITKPython3_EXECUTABLE} -m pip install --ignore-installed itk>=5.4.0 sphinx==7.2.6 six black nbsphinx ipywidgets sphinx-contributors ipykernel matplotlib itkwidgets[lab,notebook]>=1.0a51 pydata-sphinx-theme
+  INSTALL_COMMAND ${ITKPython3_EXECUTABLE} -m pip install --ignore-installed itk>=6.0a1 sphinx==8.1.3 six black nbsphinx ipywidgets sphinx-contributors ipykernel matplotlib itkwidgets[lab,notebook]>=1.0a54 pydata-sphinx-theme
   COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/ITKBlackConfig.cmake
   )