Configure failure - nevermind!
I wrote:
Configuration name missing.
Usage: /usr/local/src/xemacs-21/config.sub CPU-MFR-OPSYS
or /usr/local/src/xemacs-21/config.sub ALIAS
where ALIAS is a recognized configuration type.
I figured this one out... I had updated my C compiler (gcc) and didn't
have a symlink cc->gcc. Seems like config.guess wants to use cc if
$CC is not set in the environment. Creating a symlink makes the
problem go away.