[cmake-developers] Add command line options for deprecation message control

[Michael Scott]

> Actually when one choose a build tree it will locate the corresponding
> source tree automatically if both exist.  Selecting the source tree
> may be followed by creating a new build tree so that direction does
> not happen automatically IIRC.
Okay, I'm not too familiar with the GUI, how do you choose a build tree? 
So that I can look at where I can hook in the message cache detection.

> Your mailer broke the thread again.
Sorry, this one shouldn't break the thread.


Cheers,
Michael