- 6.4.1 release
    - the following patches are now upstream: ghc-6.4-powerpc.patch,
        rts-GCCompact.h-x86_64.patch, ghc-6.4-dsforeign-x86_64-1097471.patch,
        ghc-6.4-rts-adjustor-x86_64-1097471.patch
    - builds with gcc4 so drop %%_with_gcc32
    - x86_64 build restrictions (no ghci and split objects) no longer apply