请指点一下在VM下面编译FB4.11内核出错怎么解决？

lnx

自己做了个精简内核，但在make depend了一会时出现下面的提示后就停止了，请各位指点一下，谢谢！

make -V CFILES -V SYSTEM_CFILES -V GEN_CFILES | xargs  mkdep -a -f .newdep -O -pipe  -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -fformat-extensions -ansi  -nostdinc -I- -I. -I../.. -I../../../include -I../../contrib/dev/acpica -I../../contrib/ipfilter  -D_KERNEL -include opt_global.h  -mpreferred-stack-boundary=2
../../netipsec/key.c:911: unterminated `#if' conditional
In file included from ../../i386/isa/pci_cfgreg.c:47:
machine/pci_cfgreg.h:35: warning: `CONF1_ENABLE_MSK' redefined
../../i386/isa/pcibus.h:35: warning: this is the location of the previous definition
In file included from ../../i386/isa/pcibus.c:38:
machine/pci_cfgreg.h:35: warning: `CONF1_ENABLE_MSK' redefined
../../i386/isa/pcibus.h:35: warning: this is the location of the previous definition
mkdep: compile failed
*** Error code 1
Stop in /usr/src/sys/compile/IPF_GENERIC