Please add --enable-cmsis-dap with dependency on comms/hidapi to the optionlist. I've successfully tested it with several Atmel onboard EDBG on xplained and Arduino M0 pro boards as well as the Atmel-ICE using a FreeBSD-arm system.
Port has been updated with this as an option Thanks
A commit references this bug: Author: skreuzer Date: Fri Feb 26 18:33:42 UTC 2016 New revision: 409629 URL: https://svnweb.freebsd.org/changeset/ports/409629 Log: Add an option to build with support for CMSIS-DAP PR: 207488 Submitted by: Bernd Walter <ticso@cicely7.cicely.de> Changes: head/devel/openocd/Makefile