build kernel broken in hammer_mirror.c

[Francois Tigeot <ftigeot@xxxxxxxxxxxx>]

This is the result of a "make kernel" with today's src snapshot:

sh /usr/src/sys/conf/newvers.sh GENERIC cc -c -O -pipe  -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -std=c99 -g -nostdinc -I. -Iinclude -I/usr/src/sys -I/usr/src/sys/../include -I/usr/obj/usr/src/sys/GENERIC -I"/usr/src/sys/dev/acpica5" -I"/usr/src/sys/contrib/dev/acpica-unix-20061109/include" -I/usr/src/sys/contrib/ipfilter  -D_KERNEL -include opt_global.h -finline-limit=8000 --param inline-unit-growth=100 --param lar
ge-function-growth=1000 -fno-common -ffreestanding -mpreferred-stack-boundary=2 -fno-stack-protector -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3  vers.c
linking kernel.debug
hammer_mirror.o: In function `hammer_ioc_mirror_read':
/usr/src/sys/vfs/hammer/hammer_mirror.c:259: undefined reference to `crc32_ext'
*** Error code 1

-- 
Francois Tigeot