Created attachment 236375 [details] Failing build log. After yesterday's reversion, libkml will no longer build. Building requires deletion of the port. "pkg delete -f libkml". The port then builds and installs cleanly. A note to this effect in UPDATING would appear appropriate.
Thanks for sharing your solution. I am struggling with this build error of libkml for some days now, not finding anything in UPDATING and hoping for a further revision solving the build error. I can confirm that after deleting the package build just works fine.