The build tree derived from "lesstif-0.91.4-1.src.rpm" from your
server links the libtool files "config.guess", "config.sub", "ltconfig", and
"ltmain.sh" to "/usr/local/share/libtool".
On a stock Red Hat system, those files are in "/usr/share/libtool",
rather than in "/usr/local". This breaks the build.
The offending links are in the root directory of the build tree, and in
"lib/XBae" and "lib/Xlt".
An easy fix that doesn't require you to mess with the tarball is to
change the "prep" phase in the RPM spec file to fix up the links.
-- John B.