[CMake] Progress reporting in CMake

[Bill Hoffman]

Denis Scherbakov wrote:
> I see progress jumping even on freshly CMake prepared, but never compiled tree.
> 
> So is this a bug or a feature?
> 

The progress is an approximation at best.  It should always betting 
bigger, and it should not go over 100%.   Working with make there really 
is not a better way to do it.   When the first configure is run, CMake 
has really no idea how much stuff is in the project, so it just keeps 
heading towards 100 until it is done.   After that it basically just 
reports on the number of directories processed.   There is no global 
count of all the rules that need to be run in make, or a way to get that 
information.


-Bill