; cd /sys/src/cmd
; objtype=arm mk bar.install
5c -FTVw bar.c
5l  -o 5.bar bar.5
nanosec: undefined: cycles
(1802)	BL	,cycles+0(SB)
nanosec: illegal combination BL 0 0 26
(1802)	BL	,cycles+0(SB)
nanosec: illegal combination BL 0 0 26
(1802)	BL	,cycles+0(SB)
mk: 5l  -o ...  : exit status=5l 87108: error