(cmake) update finding of Xerces and Json, according to the build options

CMakeLists.txt

@@ -33,8 +33,8 @@ set( CMAKE_FIND_FRAMEWORK "LAST" CACHE STRING
 # Set up how the project handle some of its dependenices. Either by picking them
 # up from the environment, or building them itself.
 include( SetupEigen3 )
-include( SetupXercesC )
-include( SetupJSON )
+#include( SetupXercesC )
+#include( SetupJSON )
 
 # Find the dependencies that the project always picks up from its environment.
 find_package( SQLite3 3.7.17 )
@@ -59,11 +59,14 @@ list( APPEND BUILT_PACKAGES "GeoModelIO")
 
 
 if(GEOMODEL_BUILD_TOOLS)
+  include( SetupXercesC )
+  include( SetupJSON )
   add_subdirectory(GeoModelTools)
   list( APPEND BUILT_PACKAGES "GeoModelTools")
 endif()
 
 if(GEOMODEL_BUILD_VISUALIZATION)
+  include( SetupJSON )
   add_subdirectory(GeoModelVisualization)
   list( APPEND BUILT_PACKAGES "GeoModelVisualization")
 endif()
@@ -74,12 +77,15 @@ if(GEOMODEL_BUILD_EXAMPLES)
 endif()
 
 if(GEOMODEL_BUILD_FULLSIMLIGHT)
+  include( SetupXercesC )
+  include( SetupJSON )
   set(GEOMODEL_BUILD_GEOMODELG4 TRUE) # FullSimLight needs GeoModelG4
   add_subdirectory(FullSimLight)
   list( APPEND BUILT_PACKAGES "FullSimLight")
 endif()
 
 if(GEOMODEL_BUILD_GEOMODELG4 OR GEOMODEL_BUILD_EXAMPLES_W_GEANT4)
+  include( SetupXercesC )
   add_subdirectory(GeoModelG4)
   list( APPEND BUILT_PACKAGES "GeoModelG4")
 endif()