It has been announced that the debian-amd64 project will move from the
current alioth machine to a new host soon.
The amd64 gcc-3.4/gcc-4.0 archive will not move to that new host.
Instead, it will be rebuilt from scratch with the newly released gcc-4.0
and reuploaded to a different project on alioth. This process
will take a few days. During this period, the gcc-3.4/gcc-4.0 archive
will not be available. I apologize for the inconvenience, but alioth
is low on disk space and consequently the old archive has to be deleted
before the new files can be safely uploaded.
The rebuilt gcc4 archive will be accessible in a few days at the
following new location:
deb http://debian-ppc64.alioth.debian.org/gcc4 unstable main contrib non-free