Hello Guix, I've pushed a new branch 'wip-armhf' (not to be confused with 'wip-arm') which seems likely to finish natively building bootstrap tarballs soon. It is based on the 'core-updates' branch.
I chose system name "armhf-linux", GNU triplet "arm-linux-gnueabihf", and the following GCC configure flags: --with-arch=armv7-a --with-float=hard --with-mode=thumb --with-fpu=vfpv3-d16 I believe this coincides with what Debian does for their 'armhf' port. This branch is *not* ready for use. For one thing, the current bootstrap tarballs are cross-compiled, and we should wait for the natively-compiled ones. The branch is for review. Comments and suggestions solicited! Mark