[CMake] include_directories(...) versus set_directory_properties(PROPERTIES INCLUDE_DIRECTORIES ...)

[David Cole]

>> That's just the quick brain dump version. If necessary, I can 
actually
>> look at old commits, or the current code to try to refresh my memory.
>>
>
> I think that's needed. Can you do that research into the commits and
> discussion?


Please see the results of my "research" (aka, old commits detective 
work) in the newly added note to the mantis bug report here:

    http://public.kitware.com/Bug/view.php?id=14758#c35153

Sorry I don't have more time to spend on this for a while, but the 
links are in the bug note if anybody wants to investigate ways to 
reverse the effects of postponing de-duplication.


Cheers,
David C.