On my system, running "libtoolize --copy" creates config.guess. I don't see why it doesn't on your system, or how adding automake would fix that anyway.
Update config.sub, install-sh, and config.guess from latest libtool.
Old versions of libtool would re-copy config.guess with "libtoolize --copy",
but new versions need "libtoolize --copy --install". Instead of trying to
detect the version, we'll just add config.guess to the repository for now.