Make setup to print out wrong keyword(s)

Hello,

would it be possible for setup to print out wrong keyword ? For instance, **--debug** flag disappeared from DIRAC setup...why ? 
~~~
milias@hydra.jinr.ru:~/work/software/dirac/master_trunk/../setup --fc=ifort --mkl=parallel --debug  --int64  build_ifort_mklpar_i8_debug
ERROR: bad input to ./setup

Usage:
  ./setup [options] [<builddir>]
  ./setup (-h | --help)
~~~
