See attached build log. (Please do not complain about the need for looking at the build log until you can provide an easy way to open bugs with the correct data picked out of a tinderbox log. Thanks.)
Created attachment 250349 [details] Build log
Adding --ldopt="${LDFLAGS}" to ./configure is sufficient to fix that bug. As I hit a sandbox violation during the install (not related to this bug), I wrote the patch to fix that last, and uploaded the new ebuild with both fixes to the lisp overlay.
removed