unknown option: '-cpp'
scala [ <compiler-option> | -howtorun:how ]... [<torun> <arguments>]

<compiler-option>'s are as for scalac; see scalac -help.
<torun>, if present, is an object or script file to run.
If no <torun> is present, run an interactive interpreter.
-howtorun allows explicitly specifying how to run <torun>:
    script: it is a script file
    object: it is an object name
    guess: (the default) try to guess

3: 1: test 1 passed (1)
3: 2: 1: test 1 passed (1)
3: 1: test 2 passed (1)
3: 2: 1: test 2 passed (1)
3: 1: test 3 passed (1)
3: 2: 1: test 3 passed (1)
3: 1: test 4 passed (2)
3: 2: 1: test 4 passed (2)