Build and run art with ROOT6
Support compilation and running of art using ROOT version 6. As requested by the art developers, this is intended as a top level ticket for this work, so properties/subtasks will be mapped according to their bookkeeping.
Items for discussion/subtasks could include (NB, I'm a newbie to ROOT6, so these are based on my limited understanding of changes)
- Migration of Reflex to Rootcling based dictionaries, including schema evolution
- Use of TClass API in place of Reflex API
- Backward/Forward compatibility with ROOT5 files/dictionaries
- Portability to Clang/Intel compilers (Issues #8011, #8227)
No doubt many others!