[Haskell-cafe] Question: template-haskell and profiling

[Robin Green]

As a workaround, you could try to use zeroTH to preprocess the template
haskell. (I have a patched version of zeroTH that works better but it
currently requires a patched version of GHC - ask me if you want it.)

ZeroTH darcs repo: http://darcs.haskell.org/~lemmih/zerothHead/
Original announcement by Lemmih:
http://permalink.gmane.org/gmane.comp.lang.haskell.template/219
-- 
Robin

On Fri, 27 Apr 2007 20:26:21 +0700
"ET" <equipment at ngs.ru> wrote:

> Hi, folks
> 
> Trying to profile the modules, those contain a template-haskell
> splices, I have ran into problem - GHC6.4 (win2K) returns an error
> message and then stops. Without the "-prof" option all works fine.
> 
> Is there a way to bypass this inconsistency?
> 
> 
> Example below illustrates the problem:
> 
> ============================
> 
> {-# OPTIONS_GHC -fth #-}
> module Main where
> 
> import MainTH
> 
> main :: IO ()
> main = putStrLn . show . fact $ 100
> 
> fact :: Integer -> Integer
> fact n = $(thFact "n")
> 
> ============================
> 
> module MainTH where
> 
> import Language.Haskell.TH
> 
> thFact :: String -> ExpQ
> thFact s =  appE (dyn "product") 
>   (arithSeqE (fromToR (litE . integerL $ 1) (dyn s)))
> 
> preview :: IO ()
> preview = runQ (thFact "x") >>= putStrLn . pprint
> 
> ============================
> 
> >ghc --make -prof Main.hs
> Chasing modules from: Main.hs
> Compiling MainTH           ( ./MainTH.hs, ./MainTH.o )
> Compiling Main             ( Main.hs, Main.o )
> Loading package base-1.0 ... linking ... done.
> Loading package haskell98-1.0 ... linking ... done.
> Loading package template-haskell-1.0 ... linking ... done.
> ghc:
> ./MainTH.o: unknown symbol `_era'
> 
> With function "MainTH.preview" excluded from export list, final
> phrase were ghc:
> ./MainTH.o: unknown symbol `_entering_PAP'
> 
> 
> 
> 
> 
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