Alexander Vodomerov wrote:
Hello!
I'm trying to build shared library from Haskell source to call it from external C program. Everything works fine on usual x86 machine.
However, any attempt to compile code as position independent on x86-64 result in fatal error. This is simple example:
$ cat adder.hs module Adder where
f :: Int -> Int -> Int f x y = x + y
$ ghc -fPIC -c adder.hs ghc-6.6.1: panic! (the 'impossible' happened) (GHC version 6.6.1 for x86_64-unknown-linux): initializePicBase
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
$
I've read source file compiler/nativeGen/PositionIndependentCode.hs and found that function initializePicBase is not implemented for x86-64 platform.
Are there any plans to implement such a functionality? Are there any global difficulties with such an implementation or nobody just cared about it?
As you noticed, shared libraries are only partially implemented in GHC. There is a Google Summer of Code project to get shared libraries working, the work is ongoing right now, drop into #ghc on IRC to find out more. Cheers, Simon