[CMake] CMake for many interdependent libraries/executables

[Wiser, Tyson]

We already have nightly builds set up, so this would certainly be a possibility,
though I would have to think through how to make it work when we didn't have a
connection to our build server.  I would still prefer, however, to have this
work locally.  You mention that you set this up 5 years or so ago.  Was that
before the ExternalProject module existed?  If not, was there a reason
ExternalProject was not used?

Since no one has responded to say that my ideas are not possible I will probably
start tinkering with them in my spare time.  If I discover anything in the
process I will post it here, though it won't likely be very soon.  If anyone
does have thoughts as to the possibility or impossibility of such a setup I am
still very much interested in hearing them.


> What we did here, faced with the same issue, is have an automated, ightly build
> that builds everything, and then have partial checkouts.
>
> The cmake link dependencies then first check if there is local source and local
> libs, and if so uses those, otherwise it takes the nightly build libs.
>
> A bit of a pain to setup, but once it's setup (which was 5 years orso ago), it is a blessing.