Re: Cannot find normal object file when compiling TH code

3 Jan 2014


      You should maybe delete your pre cabal 1.18 ~/.cabal/config file and run
cabal update then merge back any important settings. I think cabal 1.18 by
default builds everything with dynamic-too

On Thursday, January 2, 2014, Yorick Laupa wrote:
...
Except expected #7021 error message, it works on my machine (Archlinux
x86_64) with --dynamic-too
2014/1/2 Carter Schonwald >
...
would --dynamic-too work too?
On Thu, Jan 2, 2014 at 5:36 PM, Yorick Laupa 
...
wrote:
...
Hi Carter,
Someone figured it out on #ghc. It seems we need to compile with
-dynamic when having TH code now (
https://ghc.haskell.org/trac/ghc/ticket/8180)
About a snippet, I working on that ticket (
https://ghc.haskell.org/trac/ghc/ticket/7021) so it's based on the
given sample:
-- Tuple.hs
{-# LANGUAGE ConstraintKinds, TemplateHaskell #-}
module Tuple where
import Language.Haskell.TH
type IOable a = (Show a, Read a)
foo :: IOable a => a
foo = undefined
test :: Q Exp
test = do
    Just fooName <- lookupValueName "foo"
    info         <- reify fooName
    runIO $ print info
    [| \_ -> 0 |]
--
-- Main.hs
{-# LANGUAGE TemplateHaskell #-}
module Main where
import Tuple
func :: a -> Int
func = $(test)
main :: IO ()
main = print "hello"
--
2014/1/2 Carter Schonwald 
...
...
Did you build ghc with both static and dynamic libs? Starting in
7.7/HEAD, ghci uses Dylib versions of libraries, and thus TH does too.
 What OS and architecture is this, and what commit is your ghc build from?
Last but most importantly, if you don't share the code, we can't really
help isolate the problem.
On Thursday, January 2, 2014, Yorick Laupa wrote:
...
Hi,
Oddly I can't compile code using TH with GHC HEAD. Here's what I get:
cannot find normal object file ‛./Tuple.dyn_o’
    while linking an interpreted expression
I'm currently working on a issue so I compile the code with ghc-stage2
for convenience.
I found an old ticket related to my problem (
https://ghc.haskell.org/trac/ghc/ticket/8443) but adding
-XTemplateHaskell didn't work out.
The code compiles with ghc 7.6.3.
Here's my setup: Archlinux (3.12.6-1)
Any suggestions ?
--Yorick