I Am unable to finish the kernel compilation.

I ahve the following error

ld -N -Ttext 80000000 -e start -S -o netbsd ${SYSTEM_OBJ} vers.o
cd9660_lookup.o: Undefined symbol `_strncasecmp' referenced from text
segment
*** Error code 1

Stop.

lastest current kernel, VAXstatoin 4000/60

any hint about it ?
thanks 

rj45