ENH: runTimePostProcessing - updated CMakeLists.txt for cmake > 3

src/postProcessing/functionObjects/graphics/runTimePostProcessing/CMakeLists.txt

@@ -2,22 +2,26 @@ cmake_minimum_required(VERSION 2.8)
 
 project(runTimePostProcessing)
 
-if (EXISTS $ENV{VTK_DIR})
+# Set policy for CMP0002 needed for cmake > 3
+cmake_policy(SET CMP0002 OLD)
+
+if (EXISTS "$ENV{VTK_DIR}")
     message("Building with VTK from $ENV{VTK_DIR}")
     find_package(VTK REQUIRED HINTS $ENV{VTK_DIR})
     include(${VTK_USE_FILE})
-
-else (EXISTS $ENV{ParaView_DIR})
+elseif (EXISTS "$ENV{ParaView_DIR}")
     message("Building with Paraview from $ENV{ParaView_DIR}")
     find_package(ParaView REQUIRED)
     include(${VTK_USE_FILE})
-
     set(
         VTK_VERSION
         "${VTK_MAJOR_VERSION}.${VTK_MINOR_VERSION}.${VTK_BUILD_VERSION}"
     )
-endif (EXISTS $ENV{VTK_DIR})
+else ()
+    message (FATAL_ERROR "VTK not found using VTK_DIR or ParaView_DIR")
+endif ()
 
 include(CMakeLists-Common.txt)
 
+
 #-----------------------------------------------------------------------------