[GHC] #8180: ghc --make uses wrong way with Template Haskell

27 Aug 2013

      #8180: ghc --make uses wrong way with Template Haskell
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       Reporter:  goldfire        |             Owner:
           Type:  bug             |            Status:  new
       Priority:  normal          |         Milestone:
      Component:  Compiler        |           Version:  7.7
       Keywords:                  |  Operating System:  MacOS X
   Architecture:  x86_64 (amd64)  |   Type of failure:  None/Unknown
     Difficulty:  Unknown         |         Test Case:
     Blocked By:                  |          Blocking:
Related Tickets:                  |
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 I have the following files:

 {{{
 {-# LANGUAGE TemplateHaskell #-}

 module THSplice where

 number3 = [| 3 |]
 }}}

 {{{
 {-# LANGUAGE TemplateHaskell #-}

 module Main where

 import THSplice

 main = putStrLn (show $number3)
 }}}

 When I say `ghc Main.hs`, I get this:

 {{{
 [1 of 2] Compiling THSplice         ( THSplice.hs, THSplice.o )
 [2 of 2] Compiling Main             ( Main.hs, Main.o )
 Loading package ghc-prim ... linking ... done.
 Loading package integer-gmp ... linking ... done.
 Loading package base ... linking ... done.
 Main.hs:7:23:
     cannot find normal object file ‛./THSplice.dyn_o’
     while linking an interpreted expression
 }}}

 It's possible a different collection of flags could get this to work, but
 I think this behavior goes against the intended "it just works" flavor of
 `--make`.

 This is a regression bug -- ghc 7.6.3 does the right thing.

 I'm on MacOS 10.7.5, Xcode 4.3.3.

-- 
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8180
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