[CMake] Technique for generating projects that depend on generated sources

[Bill Hoffman]

I had another idea.  About how many generated files are there, and how 
big are they? It they are smallish, you could generate a single source 
file that includes the generated files.

generated.cxx
#include "gen1.cxx"
#include "gen2.cxx"
#include "gen3.cxx"
...

Then you could have a custom command generate gen1-N.cxx first, and then 
  generate generated.cxx last, and only compile generated.cxx.

-Bill