\begin{code}
{-# LANGUAGE CPP #-}
{-# OPTIONS_GHC -Wall #-}
module Main (main) where

#ifndef MIN_VERSION_cabal_doctest
#define MIN_VERSION_cabal_doctest(x,y,z) 0
#endif

#if MIN_VERSION_cabal_doctest(1,0,0)

import Distribution.Extra.Doctest ( defaultMainWithDoctests )
main :: IO ()
main = defaultMainWithDoctests "doctests"

#else

#ifdef MIN_VERSION_Cabal
#warning You are configuring this package without cabal-doctest installed. \
         The doctests test-suite will not work as a result. \
         To fix this, install cabal-doctest before configuring.
#endif

import Distribution.Simple

main :: IO ()
main = defaultMain

#endif

\end{code}
