[CMake] Pure Python project

[Emmanuel Blot]

Hi,

I'm using CMake (2.6) to build several C and C++ projects.
I'd like to add another project which would be a pure Python project:

CMake would simply have to invoke Python script (which in turn  
generates an output file based on two input files).
What would be the rules to do so ?

I've tried ADD_CUSTOM_COMMAND and ADD_CUSTOM_TARGET with no luck:
CMake does create the Makefile files, but running "make" simply does  
nothing (no error, simply does nothing)

TIA,
Manu.