GHC.Prim problem

[Stefan O'Rear]

On Tue, May 29, 2007 at 09:58:38PM -0400, Alec Berryman wrote:
> Simon Marlow on 2007-05-29 16:05:49 +0100:
> 
> > Ben Sinclair wrote:
> > >Hello, I've had a problem with GHC.Prim when compiling the darcs HEAD
> > >lately. When I compile it in the normal way with no special options
> > >
> > >>sh boot && ./configure && make && make install
> > >
> >
> > It works for me, with last night's HEAD build.  Are you running GHC from
> > the build tree, or installing it first?  (not that it ought to make a
> > difference). If you say 'ghc-pkg describe base', does it list GHC.Prim as
> > exposed?
> 
> I built a clean HEAD from today and installed it with 'make install'.
> It works well enough to compile libraries like zlib and binary as well
> as applications like xmonad.
> 
> When I try to compile the example file Ben gave using the installed ghc,
> it fails as Ben described - no GHC.Prim.  'ghc-pkg describe base' does
> not list GHC.Prim as exported, even though base's cabal file does.  When
> I use the GHC from the build tree, it compiles fine.
> 
> > While importing GHC.Prim should work, the right way is to import GHC.Exts
> > instead.
> 
> GHC.Exts doesn't appear to export unsafeCoerce#, which hs-plugins and
> gtk2hs both want.

I'd like to point out one other major application which depends on the
availability of GHC.Prim:

GHC

(As of 20070518) GHC HEAD cannot compile itself for exactly this reason.

Stefan