Dear all,

While trying to retrieve the STG using ghc I bumped into the following problem:

I try to compile the source file in a more or less standard way, found in many examples on the web:

...

                       setTargets targets

                       _ <- load LoadAllTargets

                       mgraph <- depanal [] False

                       mapM_ (compileModSummary) mgraph

Then I compile the individual files through the following pipeline (also more or less standard, I thought):

compileModSummary = do

...

     stg <- parseModule theMod

    >>= typecheckModule

    >>= desugarModule

    >>= liftIO . hscSimplify env . coreModule

    >>= liftIO . tidyProgram env

    >>= prepPgm env . fst

    >>= liftIO . coreToStg dynflags

   …

Then I do a dump to (just to check the results):

    writeFile “filename” (show . showOutputable $ stg)

The problem is, if I do a stg dump from the command line (like <compiler> -ddump-stg --make Main.hs (where <compiler> is the intended compiler program) the dump is different from the stg dump I do at writefile, to the extent that functions are missing, which gives problems when linking the results. They are numbered functions, like ‘value1’, etc. I’m not very much into the ghcmake stuff, and I’m probably missing a lot, however I have been struggling with this for a couple of days now, and it is not getting any clearer.

I guess my question would be, why is there a difference, and how could I avoid this? Any help or pointers appreciated.

kind regards,

Maarten

p.s. This is just pseudo code. I necessary, I could probably strip my sources into a working example that displays the problem, if that would help.