Updating CheckVTKVersion

src/Cxx/Utilities/CheckVTKVersion.cxx

 #include <vtkVersion.h>
 
-int main(int, char *[])
+#ifdef VTK_VERSION_NUMBER
+#if VTK_VERSION_NUMBER >= 90000000000ULL
+#define VTK_VER_GE_90 1
+#endif
+#else
+#define VTK_VERSION_NUMBER_NOT_DEFINED 1
+#endif
+
+namespace {
+/**
+ * Check the VTK version.
+ *
+ * @param major: Major version.
+ * @param major: Minor version.
+ * @param major: Build version.
+ *
+ * @return True if the requested VTK version is greater or equal to the actual
+ * VTK version.
+ */
+bool VTKVersionOk(unsigned long long const& major,
+                  unsigned long long const& minor,
+                  unsigned long long const& build);
+
+} // namespace
+
+int main(int, char*[])
 {
-  std::cout << vtkVersion::GetVTKSourceVersion() << std::endl;
-  std::cout << vtkVersion::GetVTKMajorVersion() << std::endl;
-  std::cout << vtkVersion::GetVTKMinorVersion() << std::endl;
+#ifdef VTK_VERSION_NUMBER
+  std::cout << "Source version: " << vtkVersion::GetVTKSourceVersion()
+            << std::endl;
+  std::cout << "Major Version : " << vtkVersion::GetVTKMajorVersion()
+            << std::endl;
+  std::cout << "Minor Version : " << vtkVersion::GetVTKMinorVersion()
+            << std::endl;
+#elif VTK_VERSION_NUMBER_NOT_DEFINED
+  std::cout << "VTK VTK_VERSION_NUMBER is not defined." << std::endl;
+  std::cout << "VTK Major Version: " << VTK_MAJOR_VERSION << std::endl;
+  std::cout << "VTK Minor Version: " << VTK_MINOR_VERSION << std::endl;
+#endif
+
+#ifdef VTK_VER_GE_90
+  std::cout << "VTK Version is >= " << VTK_VERSION_NUMBER << std::endl;
+#endif
+
+  if (!VTKVersionOk(8, 90, 0))
+  {
+    std::cerr << "You need VTK version 8.90 or greater to run this program."
+              << std::endl;
+    return EXIT_FAILURE;
+  }
+  else
+  {
+    std::cout << "You have the needed VTK version" << endl;
+  }
 
   return EXIT_SUCCESS;
 }
+
+namespace {
+bool VTKVersionOk(unsigned long long const& major,
+                  unsigned long long const& minor,
+                  unsigned long long const& build)
+{
+  unsigned long long neededVersion =
+      10000000000ULL * major + 100000000ULL * minor + build;
+#ifndef VTK_VERSION_NUMBER
+  auto ver = vtkSmartPointer<vtkVersion>();
+  unsigned long long vtk_version_number =
+      10000000000ULL * ver->GetVTKMajorVersion() +
+      100000000ULL * ver->GetVTKMinorVersion() + ver->GetVTKBuildVersion();
+  if (vtk_version_number >= neededVersion)
+  {
+    return true;
+  }
+  return false;
+#else
+  if (VTK_VERSION_NUMBER >= neededVersion)
+  {
+    return true;
+  }
+  return false;
+#endif
+}
+
+} // namespace