Rendering/ZSpace: localize the SDK selection

Instead of making a header, just add it as a compile definition for the
one file that cares.

Rendering/ZSpace/CMakeLists.txt

@@ -25,6 +25,10 @@ else()
   vtk_module_find_package(PACKAGE zSpace)
 endif()
 
+set_property(SOURCE vtkZSpaceSDKManager.cxx APPEND
+  PROPERTY
+    COMPILE_DEFINITIONS "VTK_ZSPACE_USE_COMPAT_SDK=$<BOOL:${ZSPACE_USE_COMPAT_SDK}>")
+
 vtk_module_add_module(VTK::RenderingZSpace
   CLASSES ${classes}
   PRIVATE_CLASSES ${private_classes})
@@ -38,7 +42,3 @@ else()
   vtk_module_link(VTK::RenderingZSpace
     PUBLIC zSpace::zSpace)
 endif()
-
-configure_file(
-  "${CMAKE_CURRENT_SOURCE_DIR}/vtkZSpaceSDKVersion.h.in"
-  "${CMAKE_CURRENT_BINARY_DIR}/vtkZSpaceSDKVersion.h")

Rendering/ZSpace/vtkZSpaceSDKManager.cxx

@@ -19,9 +19,8 @@ PURPOSE.  See the above copyright notice for more information.
 #include "vtkRenderWindow.h"
 #include "vtkSmartPointer.h"
 #include "vtkTransform.h"
-#include "vtkZSpaceSDKVersion.h"
 
-#ifdef ZSPACE_USE_COMPAT_SDK
+#if VTK_ZSPACE_USE_COMPAT_SDK
 #include "vtkZSpaceCoreCompatibilitySDKManager.h"
 #else
 #include "vtkZSpaceCoreSDKManager.h"
@@ -41,7 +40,7 @@ vtkZSpaceSDKManager* vtkZSpaceSDKManager::GetInstance()
   static vtkSmartPointer<vtkZSpaceSDKManager> instance = nullptr;
   if (instance.GetPointer() == nullptr)
   {
-#ifdef ZSPACE_USE_COMPAT_SDK
+#if VTK_ZSPACE_USE_COMPAT_SDK
     cout << "USING CORE COMPATIBILITY ZSPACE SDK" << endl;
     instance = vtkSmartPointer<vtkZSpaceCoreCompatibilitySDKManager>::New();
 #else

Rendering/ZSpace/vtkZSpaceSDKVersion.h.in

-/*=========================================================================
-
-Program:   Visualization Toolkit
-
-Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
-All rights reserved.
-See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
-
-This software is distributed WITHOUT ANY WARRANTY; without even
-the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
-PURPOSE.  See the above copyright notice for more information.
-
-=========================================================================*/
-
-#ifndef vtkZSpaceSDKVersion_h
-#define vtkZSpaceSDKVersion_h
-
-#cmakedefine ZSPACE_USE_COMPAT_SDK
-
-#endif // vtkZSpaceSDKVersion_h