-----------------------------------------------------------------------------
\begin{code}
-{-# OPTIONS -fno-cse #-}
--- -fno-cse is needed for GLOBAL_VAR's to behave properly
-
module SysTools (
-- Initialisation
initSysTools,
runCpp dflags args = do
let (p,args0) = pgm_P dflags
args1 = args0 ++ args
- mb_env <- getGccEnv args1
- runSomethingFiltered dflags id "C pre-processor" p args1 mb_env
+ args2 = if dopt Opt_WarnIsError dflags
+ then Option "-Werror" : args1
+ else args1
+ mb_env <- getGccEnv args2
+ runSomethingFiltered dflags id "C pre-processor" p args2 mb_env
runPp :: DynFlags -> [Option] -> IO ()
runPp dflags args = do