Trouble with ghc on linux x86_64

[Simon Marlow]

Bit Connor wrote:
> The system is a xen virtual machine:
> Linux 2.6.24-19 SMP x86_64 Dual-Core AMD Opteron(tm) Processor 2212
> AuthenticAMD GNU/Linux
> 
> With GHC version 6.8.2, ghci gives the error:
> 
> $ ghci
> GHCi, version 6.8.2: http://www.haskell.org/ghc/  :? for help
> ghc-6.8.2: internal error: R_X86_64_32S relocation out of range:
> (noname) = 0x7f10a29e56d0
> 
>    (GHC version 6.8.2 for x86_64_unknown_linux)
>    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
> Aborted

Yes, this is a known bug.  Xen doesn't respect the MAP_32BIT flag to 
mmap(), which GHC on x86_64 relies on.

http://hackage.haskell.org/trac/ghc/ticket/2512

> GHC version 6.10.1 gives a similar error:
> 
> $ ghci
> GHCi, version 6.10.1: http://www.haskell.org/ghc/  :? for help
> ghc: internal error: mmap() returned memory outside 2Gb
>    (GHC version 6.10.1 for x86_64_unknown_linux)
>    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
> Aborted
 >
> These same 2 results happen on 2 different distros that I've tried.
> With both GHC versions, compiling haskell programs sometimes works,
> but sometimes hangs during the linking stage.

Compiling and running executables should work fine, only GHCi is affected 
by the above bug.  Could you try -v when linking and see what stage is hanging?

Cheers,
	Simon