Alternately, the "standard" way to use profiling with template haskell is a 2-stage process: - First, compile all of the modules normally, *without* -prof - Then, compile all of the module again, with the following flags: -prof -osuf p_o These steps, and the reason this workaround is necessary, are documented in the GHC user manual (section 7.6.4): http://www.haskell.org/ghc/docs/latest/html/users_guide/template-haskell.htm... Best, -Judah On 4/27/07, Robin Green wrote:

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" 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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