While building -current on atari for the past two days I got:

ld -n -Ttext 0 -e start -S -o netbsd ${SYSTEM_OBJ} vers.o
bcopy.o: Definition of symbol memcpy' (multiply defined)
/sys/arch/atari/compile/GENERIC/lib/kern/libkern.o: Definition of
symbol memcpy' (multiply defined)
*** Error code 1

Stop.

I made sure config was up to date, so it's probably something less
glaringly obvious.

Cheers,
entropy

--
entropy -- it's not just a good idea, it's the second law.