import Development.Hake
import Development.Hake.FunSetRaw
import System.Environment

target         = "hello"
default_cflags = [ "-O" ]

main = do
  args <- getArgs
  let cflags_ = getVals "cflags" args
      cflags  = if null cflags_ then default_cflags else cflags_
  hake [

   dflt [ target ]
   ,
   rule "" ".c" $ \t (s:_) -> [ [ "cc" ] ++ cflags ++ [ "-o", t, s ] ]
   ,
   task "clean" [ [ "rm", "-f", target ] ]

   ]