Tweaking VTK find_package

CMake/SuperBuild.cmake

-include(ExternalProject)
-
 project (SuperBuild CXX C)
+include(ExternalProject)
 
 if (Eigen3_FOUND)
     message( STATUS "Eigen was found ${eigen_DIR}" )
 		#BUILD_COMMAND     ""
 		#INSTALL_COMMAND     ""
     )
-    #message("Source dir of myExtProj = ${SOURCE_DIR}")   
-    #ExternalProject_Get_property(EIGEN SOURCE_DIR)
-    #message("Source dir of myExtProj = ${SOURCE_DIR}")   
- 
-    # Are these necessary?
-    #include_directories ("${CMAKE_INSTALL_PREFIX}/include/eigen3/")
-    #set (Eigen3_DIR  "${CMAKE_INSTALL_PREFIX}/include/eigen3" CACHE  PATH "" FORCE )
-    
-    #find_package (Eigen3 3.3 NO_MODULE REQUIRED)
-    #if (eigen3_FOUND)
-    #    message( STATUS "Eigen was found!!!!!!!!!!!!!! ${eigen_DIR}" )
-    #endif()
 endif()
 
-
 if (yaml-cpp_FOUND)
     message( STATUS "YAML-CPP was found ${yaml-cpp_FOUND}" )
-    #message( STATUS "YAML-CPP PATH ${yaml-cpp_PATH}" )
-    #message( STATUS "YAML-CPP DIR ${yaml-cpp_DIR}" )
-    #message( STATUS "YAML-CPP INCLUDE DIR ${yaml-cpp_INCLUDE_DIR}" )
-    #message( STATUS "YAML-CPP LIBRARIES ${YAML_CPP_LIBRARIES}" )
-    #message( STATUS "YAML-CPP LIBRARY ${yaml-cpp_LIBRARY}" )
 else()
     message( STATUS "YAML-CPP WAS NOT FOUND, BUILDING" )
-    message( STATUS "CMAKE BUILD TYPE ${CMAKE_BUILD_TYPE}" )
-    message( STATUS "CMAKE CXX COMPILER ${CMAKE_CXX_COMPILER}" )
-#    if ( ${CMAKE_C_COMPILER} )
-#        message( STATUS "Compiling Yaml with Cxx COMPILER ${CMAKE_CXX_COMPILER}" )
-#	    ExternalProject_Add(YAML_CPP
-#		GIT_REPOSITORY  "https://github.com/jbeder/yaml-cpp.git"
-#		GIT_TAG   "yaml-cpp-0.6.1" # "master" 
-#		UPDATE_COMMAND ""
-#		PATCH_COMMAND ""
-#    	PREFIX ${CMAKE_CURRENT_BINARY_DIR}/external/yaml-cpp
-#    	CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX} 
-#                   -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS}
-#                   -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} 
-#    	           -DYAML_CPP_BUILD_TESTS=OFF
-#                   -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
-#                   -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER} 
-#                   -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER} 
-#        )
-#    else()
-	    ExternalProject_Add(YAML_CPP
-		GIT_REPOSITORY  "https://github.com/jbeder/yaml-cpp.git"
-		GIT_TAG "master" # "yaml-cpp-0.6.2" # "master" 
-		UPDATE_COMMAND ""
-		PATCH_COMMAND ""
-    	PREFIX ${CMAKE_CURRENT_BINARY_DIR}/external/yaml-cpp
-    	CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX} 
+    ExternalProject_Add(YAML_CPP
+        GIT_REPOSITORY  "https://github.com/jbeder/yaml-cpp.git"
+        GIT_TAG "master" # "yaml-cpp-0.6.2" # "master" 
+        UPDATE_COMMAND ""
+        PATCH_COMMAND ""
+        PREFIX ${CMAKE_CURRENT_BINARY_DIR}/external/yaml-cpp
+        CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX} 
                    -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS}
                    -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} 
     	           -DYAML_CPP_BUILD_TESTS=OFF
                    -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
                    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER} 
                    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER} 
+    )
+endif()
+
+if ( LEMMA_VTK8_SUPPORT )
+    find_package(VTK 8)
+#   find_package(VTK 8.9 COMPONENTS vtkCommonCore vtkRenderingCore vtkFiltersCore vtkFiltersSources 
+#           vtkCommonDataModel vtkFiltersHyperTree vtkIOXML vtkIOImage vtkIOLegacy vtkIOGeometry vtkInteractionStyle 
+#           vtkRenderingAnnotation vtkFiltersHybrid vtkFiltersModeling vtkRenderingVolumeOpenGL2 NO_MODULE)
+    #find_package(VTK 8 NO_MODULE) 
+            #vtkCommonDataModel vtkFiltersHyperTree vtkIOXML vtkIOImage vtkIOLegacy vtkIOGeometry vtkInteractionStyle 
+            #vtkRenderingAnnotation vtkFiltersHybrid vtkFiltersModeling vtkRenderingVolumeOpenGL2 NO_MODULE)
+    if ( NOT VTK_FOUND OR  VTK_VERSION VERSION_GREATER "8.2.0" )
+        #message(FATAL_ERROR "VTK 8 was found, but the wrong one! " ${VTK_VERSION}, ${VTK_MINOR_VERSION}, ${VTK_USE_FILE} ) 
+        #endif()
+        #if ( VTK_VERSION VERSION_GREATER "8.20.0" ) # or VTK_DIR-NOTFOUND)
+        #message( AUTHOR_WARNING  "VTK > 8.20.0 was found! " ${VTK_VERSION}, ${VTK_MINOR_VERSION}, ${VTK_USE_FILE} )
+        #message( FATAL_ERROR  "VTK > 8.20.0 was found! Version found: " ${VTK_VERSION}, ${VTK_USE_FILE} )
+        message( STATUS  "VTK > 8.20.0 was found! Version found: " ${VTK_VERSION}, ${VTK_USE_FILE} )
+        message( STATUS "External build of VTK 8 has been added, this may take some time to build." )
+        ExternalProject_Add(VTK8
+        GIT_REPOSITORY "https://gitlab.kitware.com/vtk/vtk.git"
+        GIT_TAG  "v8.2.0"
+        PREFIX ${CMAKE_CURRENT_BINARY_DIR}/external/vtk8
+        CMAKE_ARGS
+            -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX}
+            -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS} /
+            -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER} /
+            -DBUILD_SHARED_LIBS:BOOL=ON /
+            -DBUILD_EXAMPLES:BOOL=OFF /
+            -DBUILD_TESTING:BOOL=OFF /
+            -DVTK_Group_Web:BOOL=OFF /
+            -DModule_vtkImagingMath:BOOL=ON /
+            LOG_DOWNLOAD 0 /
+            LOG_UPDATE 0
         )
-#    endif()
+    endif()
+    if (VTK_FOUND AND VTK_VERSION VERSION_LESS_EQUAL "8.20.0")
+        #message(STATUS "VTK 8 was found! " ${VTK_VERSION}, ${VTK_USE_FILE} ) 
+        message(STATUS "VTK 8.2 was found! " ${VTK_VERSION}, ${VTK_MINOR_VERSION}, ${VTK_USE_FILE} )
+        set(volumeRenderer volumerenderer.cxx)
+        #include(${VTK_USE_FILE}) 
+        add_definitions(-DLEMMAUSEVTK)
+    else()
+    endif()
+
 endif()
 
+
 if (LEMMA_ENABLE_TESTING)
     if (CXXTEST_FOUND)
         message( STATUS "CxxTest was found" )

CMakeLists.txt

   message(STATUS "Setting build type to 'Debug' as none was specified.")
   set(CMAKE_BUILD_TYPE Debug CACHE STRING "Choose the type of build." FORCE)
   # Set the possible values of build type for cmake-gui
-  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release"
-    "MinSizeRel" "RelWithDebInfo")
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS 
+    "Debug" 
+    "Release"
+    "MinSizeRel" 
+    "RelWithDebInfo"
+  )
 endif()
 
 # If CMAKE_BUILD_TYPE is not specified, assume Release. 
 option ( LEMMA_USE_OPENMP           "Use OpenMP in Lemma" OFF )
 option ( LEMMA_BUILD_DOCUMENTATION  "Build Doxygen man pages" OFF )
 
-#option (LEMMA_VTK7_SUPPORT "VTK 7.x library for visualisation and grids" OFF)
 option (LEMMA_VTK8_SUPPORT "VTK 8.x library for visualisation and grids" OFF)
 
 #option (CMAKE_CROSSCOMPILING "Target different arch than you are on" OFF)
 ##########################################################################################
 ## Only look for packages where we build them...this makes finding VTK a problem though! #
 ########################################################################################## 
+
 if (CMAKE_CROSSCOMPILING)
     message ( STATUS "Performing SuperBuild") #, Only searching in install directory for components." )
     # Kind of hack-ish, CMake doesn't always find this. It's buried in Cross compilation, so, 
     #    UNSET( yaml-cpp_FOUND CACHE ) 
 
     #message( STATUS "........Looking for yaml-cpp in ${CMAKE_INSTALL_PREFIX}" )
-    
+    project (CHECKSUPERBUILD CXX)
     find_package (yaml-cpp 0.6 PATHS ${CMAKE_INSTALL_PREFIX}  NO_DEFAULT_PATH ) # Serialisation of classes 
     find_package (Eigen3   3.3 PATHS ${CMAKE_INSTALL_PREFIX}  NO_DEFAULT_PATH ) # Matrix/Vector & Math
-
+    find_package (VTK      8.2.0 EXACT PATHS ${CMAKE_INSTALL_PREFIX}  NO_DEFAULT_PATH ) # Visualization 
     #message( STATUS "yaml-cpp include dir ${YAML_CPP_INCLUDE_DIR}" )
 else()
-    find_package (Eigen3 3.3 QUIET)     # Matrix/Vector & Math
+    find_package (Eigen3   3.3 QUIET )  # Matrix/Vector & Math
     find_package (yaml-cpp 0.6 QUIET )  # Serialisation of classes 
+    find_package (VTK      8.2 QUIET )  # Visualization 
 endif()
 
 INCLUDE_DIRECTORIES(${YAML_CPP_INCLUDE_DIR})
 ## Optional Dependencies
 if ( NOT Eigen3_FOUND OR 
      NOT yaml-cpp_FOUND OR 
+     (LEMMA_VTK8_SUPPORT AND NOT VTK_FOUND) OR
      (LEMMA_ENABLE_TESTING AND NOT CxxTest_FOUND) )
     message ( STATUS "Missing hard dependencies have been found, these will be downloaded any compiled." )
     message ( STATUS "This necessitates a two step build." )
 # External Projects
 ###################
 
-# We don't build VTK, it is too heavy.
-#if ( LEMMA_VTK7_SUPPORT ) 
-#	#find_package(VTK 7 REQUIRED NO_MODULE)
-#	find_package(VTK 7.0 COMPONENTS vtkCommonCore vtkRenderingCore vtkFiltersCore vtkFiltersSources 
+#if ( LEMMA_VTK8_SUPPORT ) 
+#	find_package(VTK 8) 
+#	find_package(VTK 8.9 COMPONENTS vtkCommonCore vtkRenderingCore vtkFiltersCore vtkFiltersSources 
 #			vtkCommonDataModel vtkFiltersHyperTree vtkIOXML vtkIOImage vtkIOLegacy vtkIOGeometry vtkInteractionStyle 
 #			vtkRenderingAnnotation vtkFiltersHybrid vtkFiltersModeling vtkRenderingVolumeOpenGL2 NO_MODULE)
-#	set(volumeRenderer volumerenderer.cxx)
+	#find_package(VTK 8 NO_MODULE) 
+			#vtkCommonDataModel vtkFiltersHyperTree vtkIOXML vtkIOImage vtkIOLegacy vtkIOGeometry vtkInteractionStyle 
+			#vtkRenderingAnnotation vtkFiltersHybrid vtkFiltersModeling vtkRenderingVolumeOpenGL2 NO_MODULE)
+    #if ( ${VTK_MINOR_VERSION} != 2 )
+	#	message(FATAL_ERROR "VTK 8 was found! " ${VTK_VERSION}, ${VTK_MINOR_VERSION}, ${VTK_USE_FILE} ) 
+    #endif()
+#    if (VTK_VERSION VERSION_GREATER "8.20.0")
+#		message( AUTHOR_WARNING  "VTK > 8.20.0 was found! " ${VTK_VERSION}, ${VTK_MINOR_VERSION}, ${VTK_USE_FILE} ) 
+#    endif()
 #	if (VTK_FOUND)
-#		message(STATUS "VTK 7 was found! ") 
-#	        include(${VTK_USE_FILE}) 
-#		#add_compile_options(-DLEMMAUSEVTK)
-#		#target_compile_definitions( lemmacore PRIVATE LEMMAUSEVTK=1 )
-#		add_definitions(-DLEMMAUSEVTK) 
+#		#message(STATUS "VTK 8 was found! " ${VTK_VERSION}, ${VTK_USE_FILE} ) 
+#		message(STATUS "VTK 8 was found! " ${VTK_VERSION}, ${VTK_MINOR_VERSION}, ${VTK_USE_FILE} ) 
+#		set(volumeRenderer volumerenderer.cxx)
+#	    #include(${VTK_USE_FILE}) 
 #	else()
-#		ExternalProject_Add(VTK
+#		message( STATUS "External build of VTK 8 has been added, this may take some time to build." )
+#		ExternalProject_Add(VTK8
 #  		GIT_REPOSITORY "https://gitlab.kitware.com/vtk/vtk.git"
-#		GIT_TAG  "v7.1.1"
-#    	PREFIX ${CMAKE_CURRENT_BINARY_DIR}/external/vtk7
-#  		CMAKE_ARGS
-#  	        -DBUILD_SHARED_LIBS:BOOL=ON
-#	        -DBUILD_EXAMPLES:BOOL=OFF
-#	        -DBUILD_TESTING:BOOL=OFF
-#		    -DVTK_Group_Web:BOOL=OFF
-#	        -DModule_vtkImagingMath:BOOL=ON
-#	  	    LOG_DOWNLOAD 0
+#		GIT_TAG  "v8.2.0"
+#    	PREFIX ${CMAKE_CURRENT_BINARY_DIR}/external/vtk8
+#  		CMAKE_ARGS 
+#    	    -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX} 
+#            -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS} /
+#            -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER} /
+#   	        -DBUILD_SHARED_LIBS:BOOL=ON /
+#	        -DBUILD_EXAMPLES:BOOL=OFF /
+#	        -DBUILD_TESTING:BOOL=OFF /
+#		    -DVTK_Group_Web:BOOL=OFF /
+#	        -DModule_vtkImagingMath:BOOL=ON /
+#	  	    LOG_DOWNLOAD 0 /
 #	  	    LOG_UPDATE 0
 #		)
 #	endif()
+#	add_definitions(-DLEMMAUSEVTK) 
 #endif()
 
-if ( LEMMA_VTK8_SUPPORT ) 
-	find_package(VTK 8.2 COMPONENTS vtkCommonCore vtkRenderingCore vtkFiltersCore vtkFiltersSources 
-			vtkCommonDataModel vtkFiltersHyperTree vtkIOXML vtkIOImage vtkIOLegacy vtkIOGeometry vtkInteractionStyle 
-			vtkRenderingAnnotation vtkFiltersHybrid vtkFiltersModeling vtkRenderingVolumeOpenGL2 NO_MODULE)
-	#find_package(VTK 8 NO_MODULE) 
-			#vtkCommonDataModel vtkFiltersHyperTree vtkIOXML vtkIOImage vtkIOLegacy vtkIOGeometry vtkInteractionStyle 
-			#vtkRenderingAnnotation vtkFiltersHybrid vtkFiltersModeling vtkRenderingVolumeOpenGL2 NO_MODULE)
-	if (VTK_FOUND)
-		message(STATUS "VTK 8 was found! " ${VTK_VERSION}, ${VTK_USE_FILE} ) 
-		set(volumeRenderer volumerenderer.cxx)
-	    #include(${VTK_USE_FILE}) 
-	else()
-		message( STATUS "External build of VTK 8 has been added, this may take some time to build." )
-		ExternalProject_Add(VTK8
-  		GIT_REPOSITORY "https://gitlab.kitware.com/vtk/vtk.git"
-		GIT_TAG  "v8.2.0"
-    	PREFIX ${CMAKE_CURRENT_BINARY_DIR}/external/vtk8
-  		CMAKE_ARGS 
-    	    -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX} 
-            -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS} /
-            -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER} /
-   	        -DBUILD_SHARED_LIBS:BOOL=ON /
-	        -DBUILD_EXAMPLES:BOOL=OFF /
-	        -DBUILD_TESTING:BOOL=OFF /
-		    -DVTK_Group_Web:BOOL=OFF /
-	        -DModule_vtkImagingMath:BOOL=ON /
-	  	    LOG_DOWNLOAD 0 /
-	  	    LOG_UPDATE 0
-		)
-	endif()
-	add_definitions(-DLEMMAUSEVTK) 
-endif()
-
 #######################
 # Lemma Configuration #
 #######################