CONFIG: adjustments for CMake files

- drop plugin support for Qt4 (old paraview)

- handle upcoming changes in VTK version naming in CMake files
  * VTK_MAJOR_VERSION becomes VTK_VERSION_MAJOR etc.

src/paraview-plugins/PVFoamReader/CMakeLists-Project.txt

@@ -33,11 +33,7 @@ set(
 )
 
 
-if (PARAVIEW_QT_VERSION VERSION_GREATER "4")
-  qt5_wrap_cpp(MOC_SRCS pqFoamReaderControls.h)
-else()
-  qt4_wrap_cpp(MOC_SRCS pqFoamReaderControls.h)
-endif()
+qt5_wrap_cpp(MOC_SRCS pqFoamReaderControls.h)
 
 add_paraview_property_group_widget(IFACES0 IFACES0_SRCS
     TYPE "openfoam_reader_general_controls"

src/paraview-plugins/PVFoamReader/CMakeLists.txt

@@ -13,7 +13,9 @@ endif()
 # Simple discovery and sanity checks
 
 find_package(ParaView REQUIRED)
-include(${PARAVIEW_USE_FILE})
+if (PARAVIEW_USE_FILE)
+    include(${PARAVIEW_USE_FILE})
+endif()
 
 #-----------------------------------------------------------------------------
 

src/paraview-plugins/PVblockMeshReader/CMakeLists-Project.txt

@@ -27,11 +27,7 @@ set(
 )
 
 
-if (PARAVIEW_QT_VERSION VERSION_GREATER "4")
-  qt5_wrap_cpp(MOC_SRCS pqFoamBlockMeshControls.h)
-else()
-  qt4_wrap_cpp(MOC_SRCS pqFoamBlockMeshControls.h)
-endif()
+qt5_wrap_cpp(MOC_SRCS pqFoamBlockMeshControls.h)
 
 add_paraview_property_group_widget(IFACES0 IFACES0_SRCS
     TYPE "openfoam_blockMesh_general_controls"

src/paraview-plugins/PVblockMeshReader/CMakeLists.txt

@@ -13,7 +13,9 @@ endif()
 # Simple discovery and sanity checks
 
 find_package(ParaView REQUIRED)
-include(${PARAVIEW_USE_FILE})
+if (PARAVIEW_USE_FILE)
+    include(${PARAVIEW_USE_FILE})
+endif()
 
 #-----------------------------------------------------------------------------
 

src/runTimePostProcessing/CMakeLists-Project.txt

 #-----------------------------------------------------------------------------
 project(runTimePostProcessing)
 
-include(${VTK_USE_FILE})
+message("VTK version: " ${VTK_VERSION})
 
-if(VTK_LIBRARIES)
-    message("Found VTK LIBRARIES: " ${VTK_USE_FILE})
-endif()
-
-if(${VTK_VERSION} VERSION_GREATER "6")
-    message("VTK version: " ${VTK_VERSION})
-else()
+if(${VTK_VERSION_MAJOR} LESS 6)
     message(FATAL_ERROR " VTK version is too old - requires VTK6 or newer")
 endif()
 
@@ -67,7 +61,7 @@ set(LIBRARY_OUTPUT_PATH $ENV{FOAM_LIBBIN}
 ## Record VTK version for general bookkeeping
 # file(WRITE
 #     ${CMAKE_BINARY_DIR}/version
-#     "VTK_VERSION=${VTK_MAJOR_VERSION}.${VTK_MINOR_VERSION}.${VTK_BUILD_VERSION}\n"
+#     "VTK_VERSION=${VTK_VERSION}\n"
 # )
 
 file(GLOB SOURCE_FILES
@@ -119,8 +113,8 @@ add_library(
 set_target_properties(
     runTimePostProcessing
     PROPERTIES
-    VERSION ${VTK_MAJOR_VERSION}.${VTK_MINOR_VERSION}.${VTK_BUILD_VERSION}
-    SOVERSION ${VTK_MAJOR_VERSION}
+    VERSION ${VTK_VERSION}
+    SOVERSION ${VTK_VERSION_MAJOR}
 )
 
 target_link_libraries(

src/runTimePostProcessing/CMakeLists.txt

@@ -11,22 +11,42 @@ endif()
 #-----------------------------------------------------------------------------
 # Simple discovery and sanity checks
 
+unset(VTK_VERSION)
+unset(VTK_VERSION_MAJOR)
+
 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})
 elseif (EXISTS "$ENV{ParaView_DIR}")
     message("Building with Paraview from $ENV{ParaView_DIR}")
     find_package(ParaView REQUIRED HINTS $ENV{ParaView_DIR})
-    include(${VTK_USE_FILE})
-    set(
-        VTK_VERSION
-        "${VTK_MAJOR_VERSION}.${VTK_MINOR_VERSION}.${VTK_BUILD_VERSION}"
-    )
 else()
     message(FATAL_ERROR "VTK not found using VTK_DIR or ParaView_DIR")
 endif()
 
+if (VTK_USE_FILE)
+    message("VTK from ${VTK_USE_FILE}")
+    include(${VTK_USE_FILE})
+endif()
+
+#-----------------------------------------------------------------------------
+# Handle name changes (eg, VTK_MAJOR_VERSION to VTK_VERSION_MAJOR etc.)
+
+if (VTK_MAJOR_VERSION AND NOT VTK_VERSION_MAJOR)
+    message("Found older VTK version naming")
+    set(VTK_VERSION_MAJOR ${VTK_MAJOR_VERSION})
+    set(VTK_VERSION_MINOR ${VTK_MINOR_VERSION})
+    set(VTK_VERSION_PATCH ${VTK_BUILD_VERSION})
+
+    if (NOT VTK_VERSION)
+        set(
+            VTK_VERSION
+            "${VTK_VERSION_MAJOR}.${VTK_VERSION_MINOR}.${VTK_VERSION_PATCH}"
+        )
+        message("Synthesized VTK version: " ${VTK_VERSION})
+    endif()
+endif()
+
 #-----------------------------------------------------------------------------
 
 include(CMakeLists-OpenFOAM.txt)