New ghc6 needs manual bootstrapping for C++ ABI/libgmp3 transition.
Because of the C++ ABI transition, ghc6 needs to be rebuild
against the new libgmp3c2. This however requires a manual
bootstrap because all build dependencies can't be installed.
We're however lucky that the old and new libgmp3 are compatible
and nothing is using any C++. This allows an easy workaround.
I'm still looking for people who want to build it on one of the
following arches: hppa, ia64, powerpc and s390.
To build it, follow the instruction in
PS: The build dependency on libgmp3-dev should have been
>= 4.1.4-7, 4.1.4-10 is currently the latest in sid and available
on all arches.