Trying to compile -current kernel on i386. I have source of sys.tar.gz 
and contrib.tar.gz.

#   compile  ICE.MP/sys_socket.o
cc -ffreestanding -O2 -Werror -Wall -Wno-main -Wno-format-zero-length 
-Wpointer-arith -Wmissing-prototypes -Wstrict-prototypes 
-Wno-sign-compare -fno-zero-initialized-in-bss -Di386 -I. 
-I../../../../arch -I../../../.. -nostdinc -DLKM -DMAXUSERS=32 -D_KERNEL 
-D_KERNEL_OPT -I../../../../dist/ipf -c ../../../../kern/sys_socket.c
../../../../kern/sys_socket.c: In function `soo_ioctl':
../../../../kern/sys_socket.c:130: error: structure has no member named 
`snd'
../../../../kern/sys_socket.c:130: error: structure has no member named 
`snd'
../../../../kern/sys_socket.c:131: error: structure has no member named 
`snd'
../../../../kern/sys_socket.c:131: error: structure has no member named 
`snd'
../../../../kern/sys_socket.c:134: error: invalid type argument of `->'
../../../../kern/sys_socket.c:134: error: invalid type argument of `->'
../../../../kern/sys_socket.c:134: error: invalid type argument of `->'
../../../../kern/sys_socket.c:134: error: invalid type argument of `->'
*** Error code 1

Stop.
make: stopped in /usr/src/sys/arch/i386/compile/ICE.MP

---
Thomas