building ghc6 on ppc64 linux

I am starting work on trying to bootstrap ghc-6.6.1 on ppc64 (yes 64bit) linux for Fedora. Has anyone successfully built it on ppc64 yet? The latest build I can find in a distro is ghc-6.4.2 in gentoo. Has anyone tried ghc6 on ppc64? Thanks in advance for idea comments or experiences you can share, Jens