options LINPROCFS fails in todays current ....

/sys/contrib/pf -I/usr/src/sys/contrib/dev/ath 
-I/usr/src/sys/contrib/dev/ath/freebsd -I/usr/src/sys/contrib/ngatm 
-D_KERNEL -include opt_global.h -fno-common -finline-limit=8000 --param 
inline-unit-growth=100 --param large-function-growth=1000  
-mno-align-long-strings -mpreferred-stack-boundary=2 -ffreestanding 
-Werror  vers.c
linking kernel
linprocfs.o(.text+0x3f7): In function `linprocfs_domtab':
: undefined reference to `linux_emul_path'
linprocfs.o(.text+0x436): In function `linprocfs_domtab':
: undefined reference to `linux_emul_path'
linprocfs.o(.text+0xabf): In function `linprocfs_doversion':
: undefined reference to `linux_get_osname'
linprocfs.o(.text+0xad1): In function `linprocfs_doversion':
: undefined reference to `linux_get_osrelease'
linprocfs.o(.text+0x1fe8): In function `linprocfs_donetdev':
: undefined reference to `linux_ifname'
*** Error code 1

Stop in /usr/obj/usr/src/sys/CASCADE.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.