bug

[Simon Marlow]

Hi there,

> bash.exe-2.04$ pwd
> /cygdrive/d/avv/soft/haskell/testc
> bash.exe-2.04$ ghc --interactive -fglasgow-exts
>    ___         ___ _
>   / _ \ /\  /\/ __(_)
>  / /_\// /_/ / /  | |      GHC Interactive, version 5.01, for Haskell
> 98.
> / /_\\/ __  / /___| |      http://www.haskell.org/ghc/
> \____/\/ /_/\____/|_|      Type :? for help.
> 
> Loading package std ... linking ... done.
> Prelude> :load testh2c.hs
> Skipping  Main             ( testh2c.hs, ./testh2c.o )
> ghc: panic! (the `impossible' happened, GHC version 5.01):
> 	resolveObjs: failed
> 
> Please report it as a compiler bug to 
> glasgow-haskell-bugs at haskell.org,
> or http://sourceforge.net/projects/ghc/.
> Prelude> :quit
> Leaving GHCi.
> ocResolve_PEi386: ./testh2c.o: unknown symbol `_testc'

You haven't asked GHC to load the additional object file 'testc.o'.  Try
adding this to the GHCi command line.

GHC's diagnostic is a bit unhelpful here, I'll see what I can do about
that.

> [avv at str12 testc]$ ghci -fglasgow-exts
>    ___         ___ _
>   / _ \ /\  /\/ __(_)
>  / /_\// /_/ / /  | |      GHC Interactive, version 5.00, For Haskell
> 98.
> / /_\\/ __  / /___| |      http://www.haskell.org/ghc/
> \____/\/ /_/\____/|_|      Type :? for help.
> 
> Loading package std ... linking ... done.
> Prelude> :load testh2c.hs
> Compiling Main             ( testh2c.hs, interpreted )
> ghc-5.00: panic! (the `impossible' happened, GHC version 5.00):
> 	bytecode generator can't handle unboxed tuples

The interpreter can't handle foreign declarations, so you have to load
the compiled version of this module.  Again, the diagnostic is a little
unhelpful, but the next version will have FFI support (at least for
foreign import) in the interpreter.

Cheers,
	Simon