failure of GHC 7.0.4 on OS X

[Duncan Coutts]

On Sat, 2011-09-17 at 16:51 -0700, Mark Lentczner wrote:
> In preparation for building the Haskell Platform 2011.3.0.0 installer for
> Mac OS X, I've run into a snag: The GHC central distributed version of 7.0.4
> can't produce running executables. The problem comes at final link time,
> which fails with this message:
> 
> ld: pointer in read-only segment not allowed in slidable image, used in
> ___gmpn_modexact_1c_odd from
> /Users/markl/Projects/platform/hp-mac/src/macos/dist/root/Library/Frameworks/GHC.framework/Versions/7.0.4-x86_64/usr/lib/ghc-7.0.4/integer-gmp-0.2.0.3/libHSinteger-gmp-0.2.0.3.a(mode1o.o)
> 
> I think what this means is that something about the built version of
> HSinteger-gmp in the 7.0.4 distribution isn't compatible with code compiled
> on my system. I'm running Xcode 3.2.3 on OS 10.7. Googling of this error
> resulted in other projects having this problem with libgmp compilations, but
> usually the issue was some conflict between macports versions of GMP vs. a
> non-macports version. Was the 7.0.4 release built on a macports based build?
> 
> I'm guessing I'm going to have to build GHC 7.0.4 from source for the
> Haskell Platform build.
> 
> I'm wondering - what are other people's experiences of using 7.0.4 on Mac OS
> X.

I'd like to hear some more noise about this issue. If we can't use 7.0.4
on OSX we're really stuffed.

Duncan