Dictionary Generation Dependency Fixes, master branch (2018.01.24.)
Taught the atlas_add_dictionary(...)
function to trigger the re-generation of the library's dictionary header and selection.xml
file in (hopefully) all cases when this needs to be done.
This is to fix the issue described in ATLINFR-2210.
For future reference, I tested the behaviour of the code with: https://gitlab.cern.ch/akraszna/CMakeDictionaryTests