Build failure, undefined reference to __mq_oshandle

$ uname -a
FreeBSD vega 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r277320: Mon Jan 19 
09:02:50 EST 2015 
deischen_at_vega:/usr/FreeBSD/svn/obj/usr/FreeBSD/svn/src/sys/vega  amd64

Upgrading to today's current, 'rm -rf /usr/obj/*; make -j8 buildworld'
fails here:

===> lib/libc/tests/gen/execve (buildconfig)
--- all_subdir_tests ---
--- all_subdir_mqueue ---
mqtest3.o: In function `main':
/usr/FreeBSD/svn/src/tests/sys/mqueue/mqtest3.c:(.text+0x139): undefined 
reference to `__mq_oshandle'
/usr/FreeBSD/svn/src/tests/sys/mqueue/mqtest3.c:(.text+0x14c): undefined 
reference to `__mq_oshandle'
/usr/FreeBSD/svn/src/tests/sys/mqueue/mqtest3.c:(.text+0x16c): undefined 
reference to `__mq_oshandle'
/usr/FreeBSD/svn/src/tests/sys/mqueue/mqtest3.c:(.text+0x3e6): undefined 
reference to `__mq_oshandle'
/usr/FreeBSD/svn/src/tests/sys/mqueue/mqtest3.c:(.text+0x3f9): undefined 
reference to `__mq_oshandle'
mqtest3.o:/usr/FreeBSD/svn/src/tests/sys/mqueue/mqtest3.c:(.text+0x40f): 
more undefined references to `__mq_oshandle' follow
cc: error: linker command failed with exit code 1 (use -v to see 
invocation)

Going to try make [-j1], next, but anyone come across this?

-- 
DE