[CMake] passing arguments to the final make

[Andrea Crotti]

I would like to be able to pass arguments to my generated Makefile.

Suppose I use an environment variable like this:

add_custom_target(run_dev_script
   COMMAND ${PYTHON_EXECUTABLE} ${PREREQUISITE}
   COMMAND ${PYTHON_EXECUTABLE} ${SCRIPT}
   )

Would that actually work?
In theory ${SCRIPT} is substituted at cmake time, so I have the 
impression that it wouldn't work..
I don't find anything useful in cmake -E however, that would allow me to 
do something at make time.
Any suggestions?