The build fails with Clang 6 and soon the port will be marked as BROKEN on 12.0 and 11.2 if we do not act.
Created attachment 196554 [details] devel__glademm.diff
A commit references this bug: Author: bland Date: Sun Sep 2 14:05:49 UTC 2018 New revision: 478791 URL: https://svnweb.freebsd.org/changeset/ports/478791 Log: Fix build with Clang 6 PR: 230905 Changes: head/devel/glademm/files/patch-src_Cxx.cc head/devel/glademm/files/patch-src_glade--.cc