If WITHOUT_RADIUS_SUPPORT is set to true in /etc/src.conf, "make delete-old" doesn't remove the files that may remain from when this option was not used.
A commit references this bug: Author: avos Date: Sun Jan 27 18:53:36 UTC 2019 New revision: 343502 URL: https://svnweb.freebsd.org/changeset/base/343502 Log: Remove RADIUS-related files when WITHOUT_RADIUS_SUPPORT=true is set in src.conf(5) PR: 234041 MFC after: 5 days Changes: head/tools/build/mk/OptionalObsoleteFiles.inc
A commit references this bug: Author: avos Date: Sat Feb 2 16:57:50 UTC 2019 New revision: 343685 URL: https://svnweb.freebsd.org/changeset/base/343685 Log: MFC r343502: Remove RADIUS-related files when WITHOUT_RADIUS_SUPPORT=true is set in src.conf(5) PR: 234041 Changes: _U stable/10/ stable/10/tools/build/mk/OptionalObsoleteFiles.inc _U stable/11/ stable/11/tools/build/mk/OptionalObsoleteFiles.inc _U stable/12/ stable/12/tools/build/mk/OptionalObsoleteFiles.inc