From 45b6f9ae1f3de787306bad195841efb7ef88aa02 Mon Sep 17 00:00:00 2001
From: Pablo Hernandez-Cerdan <pablo.hernandez.cerdan@outlook.com>
Date: Sun, 2 Sep 2018 19:40:19 -0400
Subject: [PATCH] ENH: Allow the developer to pass ITK build options

Using CACHE variable: Slicer_ITK_EXTRA_CMAKE_ARGS:STRING
This allow to build modules that might be needed for Modules, or
custom apps.

Example:
-DSlicer_ITK_EXTRA_CMAKE_ARGS:STRING=-DModule_XXX:BOOL=ON;
---
 CMakeLists.txt                  | 4 ++++
 SuperBuild/External_ITKv4.cmake | 1 +
 2 files changed, 5 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e0c3ec7ad91..681c6e39210 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -299,6 +299,10 @@ CMAKE_DEPENDENT_OPTION(
   "Slicer_BUILD_ITKPython" OFF)
 mark_as_superbuild(Slicer_INSTALL_ITKPython)
 
+set(Slicer_ITK_EXTRA_CMAKE_ARGS "" CACHE STRING "List with extra options to build ITK, i.e -DModule_XXX:BOOL=ON")
+mark_as_advanced(Slicer_ITK_EXTRA_CMAKE_ARGS)
+mark_as_superbuild(Slicer_ITK_EXTRA_CMAKE_ARGS)
+
 option(Slicer_BUILD_PARAMETERSERIALIZER_SUPPORT "Build Slicer with parameter serializer support" ON)
 mark_as_superbuild(Slicer_BUILD_PARAMETERSERIALIZER_SUPPORT)
 
diff --git a/SuperBuild/External_ITKv4.cmake b/SuperBuild/External_ITKv4.cmake
index c5c0ce52c7c..ea2b93b6742 100644
--- a/SuperBuild/External_ITKv4.cmake
+++ b/SuperBuild/External_ITKv4.cmake
@@ -123,6 +123,7 @@ if(NOT DEFINED ITK_DIR AND NOT Slicer_USE_SYSTEM_${proj})
       -DZLIB_INCLUDE_DIR:PATH=${ZLIB_INCLUDE_DIR}
       -DZLIB_LIBRARY:FILEPATH=${ZLIB_LIBRARY}
       ${EXTERNAL_PROJECT_OPTIONAL_CMAKE_CACHE_ARGS}
+      ${Slicer_ITK_EXTRA_CMAKE_ARGS}
     INSTALL_COMMAND ""
     DEPENDS
       ${${proj}_DEPENDENCIES}