Please add platform detection support for sh4 (Hitachi SuperH)
I am currently bootstrapping ghc for sh4 in Debian.
In order to get the ghc build scripts detect sh4 as a valid architecture, I had to make local changes to aclocal.m4. With these changes, sh4 is properly detected as an architecture and I can both cross-build for sh4 as well as build ghc on this platform natively.
Please apply the supplied patch so that we do not have to carry this patch in the Debian package  anymore.