NetBSD: XEN3 поддержка многопроцессорности?!

Дефолтовое ядро XEN3_DOM0 поддерживает 1 камень, добавляю опцию в конфиг...
options         MULTIPROCESSOR
и получаю при сборке следующее....
--- cpu.o ---
cc1: warnings being treated as errors
/usr/src/sys/arch/xen/i386/cpu.c: In function 'cpu_init_first':
/usr/src/sys/arch/xen/i386/cpu.c:213: warning: implicit declaration of function 'lapic_cpu_number'
/usr/src/sys/arch/xen/i386/cpu.c: In function 'cpu_hatch':
/usr/src/sys/arch/xen/i386/cpu.c:692: warning: implicit declaration of function 'lapic_enable'
/usr/src/sys/arch/xen/i386/cpu.c:693: warning: implicit declaration of function 'lapic_initclocks'
/usr/src/sys/arch/xen/i386/cpu.c:704: warning: implicit declaration of function 'lapic_set_lvt'
/usr/src/sys/arch/xen/i386/cpu.c:713: error: 'lapic_tpr' undeclared (first use in this function)
/usr/src/sys/arch/xen/i386/cpu.c:713: error: (Each undeclared identifier is reported only once
/usr/src/sys/arch/xen/i386/cpu.c:713: error: for each function it appears in.)
/usr/src/sys/arch/xen/i386/cpu.c: In function 'cpu_set_tss_gates':
/usr/src/sys/arch/xen/i386/cpu.c:826: warning: implicit declaration of function 'cpu_init_tss'
/usr/src/sys/arch/xen/i386/cpu.c:829: error: 'sd' undeclared (first use in this function)
*** [cpu.o] Error code 1
1 error

nbmake: stopped in /usr/obj/obj_dir/sys/arch/i386/compile/XEN3_DOM0

ERROR: Failed to make all in /usr/obj/obj_dir/sys/arch/i386/compile/XEN3_DOM0
*** BUILD ABORTED ***
Как собрать с поддержной многопроцессорности?