On 4 February 2011 05:03, Michael Snoyman wrote:

My guess (a complete guess) is that the deliterate step is creating a temporary .hs file elsewhere on your filesystem, which is why the CPP step can't find B.hs without a fully-qualified path.

That is what is happening (you can confirm with "ghc -v"). Interestingly, you can work around by compiling with -I. on the command line: {{{ mbolingbroke@equinox ~/Junk/lhscpp $ cat Test.lhs Included.h

{-# LANGUAGE CPP #-} module Main (main) where

#include "MachDeps.h" #include "Included.h"

main :: IO () main = print MY_CONSTANT #define MY_CONSTANT 2 mbolingbroke@equinox ~/Junk/lhscpp $ ./Test 2 }}}

Perhaps worth filing a bug report? Cheers Max