[CMake] post-installation testing

[Brandon J. Van Every]

How do I ensure that INSTALL has already occurred, so that I can proceed 
with post-installation testing?  When I last tried my hand at this, I 
found that "install" is not a first class dependency target.  In fact, 
trying to make a dependency on "install" crashed CMake, but the crash 
got fixed at least.

I suppose one way to do it, would be to fire up an entirely new 
CMakeLists.txt, that merely performs a bunch of FINDs on the 
installation, to prove that it's set up as one would expect.  But I'm 
wondering if there are other / better methodologies.


Cheers,
Brandon Van Every