xpp uses cupsTempFile() which is no longer a valid cups function.
A commit references this bug: Author: cy Date: Tue Nov 8 20:53:00 UTC 2016 New revision: 425761 URL: https://svnweb.freebsd.org/changeset/ports/425761 Log: Replace cupsTempFile() with tmpnam(). cupsTempFile() no longer exists. PR: 214332 Changes: head/print/xpp/Makefile head/print/xpp/files/patch-xpp.cxx
Replaced cupsTempFile() with tmpnam().