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Выдает ошибку:
cc -c -O -pipe -mcpu=pentiumpro -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -fformat-extensions -std=c99  -nostdinc -I-  -I. -I/usr/src/sys -I/usr/src/sys/dev -I/usr/src/sys/contrib/dev/acpica -I/usr/src/sys/contrib/ipfilter -D_KERNEL -include opt_global.h -fno-common  -mno-align-long-strings -mpreferred-stack-boundary=2 -ffreestanding -Werror  /usr/src/sys/i386/isa/npx.c
cc1: warnings being treated as errors
/usr/src/sys/i386/isa/npx.c:1075: warning: `npx_driver' defined but not used
/usr/src/sys/i386/isa/npx.c:1081: warning: `npx_devclass' defined but not used
*** Error code 1

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

Stop in /usr/src.

Листинг файла ядра:

machine         i386
cpu             I686_CPU
ident           MYKERNEL
maxusers        64
options         CPU_ENABLE_SSE

#To statically compile in device wiring instead of /boot/device.hints
#hints          "GENERIC.hints"         #Default places to look for devices.

#makeoptions    DEBUG=-g                #Build kernel with gdb(1) debug symbols

options         IPFIREWALL
options         IPFIREWALL_VERBOSE
options         IPFIREWALL_VERBOSE_LIMIT=100
options         IPDIVERT  
options         TCP_DROP_SYNFIN
options         NETSMB
options         SMBFS
options         QUOTA
options         MATH_EMULATE            #Support for x87 emulation
options         SCHED_4BSD              #4BSD scheduler
options         INET                    #InterNETworking
options         FFS                     #Berkeley Fast Filesystem
options         SOFTUPDATES             #Enable FFS soft updates support
options         UFS_ACL                 #Support for access control lists
options         UFS_DIRHASH             #Improve performance on big directories
options         MD_ROOT                 #MD is a potential root device
options         NFSCLIENT               #Network Filesystem Client
options         NFSSERVER               #Network Filesystem Server
options         NFS_ROOT                #NFS usable as root device, requires NFSCLIENT
options         MSDOSFS                 #MSDOS Filesystem
options         CD9660                  #ISO 9660 Filesystem
options         PROCFS                  #Process filesystem (requires PSEUDOFS)
options         PSEUDOFS                #Pseudo-filesystem framework
options         COMPAT_43               #Compatible with BSD 4.3 [KEEP THIS!]
options         COMPAT_FREEBSD4         #Compatible with FreeBSD4
options         SCSI_DELAY=15000        #Delay (in ms) before probing SCSI
options         KTRACE                  #ktrace(1) support
options         SYSVSHM                 #SYSV-style shared memory
options         SYSVMSG                 #SYSV-style message queues
options         SYSVSEM                 #SYSV-style semaphores
options         _KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions
options         KBD_INSTALL_CDEV        # install a CDEV entry in /dev
options         AHC_REG_PRETTY_PRINT    # Print register bitfields in debug
                                        # output.  Adds ~128k to driver.
options         AHD_REG_PRETTY_PRINT    # Print register bitfields in debug
                                        # output.  Adds ~215k to driver.

# Debugging for use in -current
#options        DDB                     #Enable the kernel debugger
#options        INVARIANTS              #Enable calls of extra sanity checking
options         INVARIANT_SUPPORT       #Extra sanity checks of internal structures, required by INVARIANTS
#options        WITNESS                 #Enable checks to detect deadlocks and cycles#options        WITNESS_SKIPSPIN        #Don't run witness on spinlocks for speed

device          pci

# Floppy drives
device          fdc

# ATA and ATAPI devices
device          ata
device          atadisk                 # ATA disk drives
device          atapicd                 # ATAPI CDROM drives
device          atapifd                 # ATAPI floppy drives
device          atapist                 # ATAPI tape drives
options         ATA_STATIC_ID           #Static device numbering

# ATA raid adapters
device          pst

# atkbdc0 controls both the keyboard and the PS/2 mouse
device          atkbdc          # AT keyboard controller
device          atkbd           # AT keyboard
device          psm             # PS/2 mouse

device          vga             # VGA video card driver

device          splash          # Splash screen and screen saver support
device          blank_saver
device          daemon_saver
device          fade_saver
device          fire_saver
device          green_saver
device          logo_saver
device          rain_saver
device          star_saver
device          warp_saver

# syscons is the default console driver, resembling an SCO console
device          sc

# Enable this for the pcvt (VT220 compatible) console driver
#device         vt
#options        XSERVER                 # support for X server on a vt console
#options        FAT_CURSOR              # start with block cursor

device          agp             # support several AGP chipsets

# Floating point support - do not disable.
device          npx

# Power management support (see NOTES for more options)
device          apm
# Add suspend/resume support for the i8254.
device          pmtimer

# Serial (COM) ports
device          sio             # 8250, 16[45]50 based serial ports

# Parallel port
device          ppc
device          ppbus           # Parallel port bus (required)
device          lpt             # Printer
device          ppi             # Parallel port interface device

# PCI Ethernet NICs that use the common MII bus controller code.
# NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
device          miibus          # MII bus support
device          rl              # RealTek 8129/8139

# Pseudo devices - the number indicates how many units to allocate.
device          random          # Entropy device
device          loop            # Network loopback
device          ether           # Ethernet support
device          ppp             # Kernel PPP
options         PPP_BSDCOMP
options         PPP_DEFLATE
options         PPP_FILTER
device          tun             # Packet tunnel.
device          pty             # Pseudo-ttys (telnet etc)
device          md              # Memory "disks"
device          gif             # IPv6 and IPv4 tunneling
device          faith           # IPv6-to-IPv4 relaying (translation)

# The `bpf' device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
device          bpf             # Berkeley packet filter

# USB support
device          uhci            # UHCI PCI->USB interface
device          ohci            # OHCI PCI->USB interface
device          usb             # USB Bus (required)
#device         udbp            # USB Double Bulk Pipe devices
device          ugen            # Generic
device          uhid            # "Human Interface Devices"
device          ukbd            # Keyboard
device          ulpt            # Printer
device          umass           # Disks/Mass storage - Requires scbus and da
device          ums             # Mouse
device          urio            # Diamond Rio 500 MP3 player
device          uscanner        # Scanners
# USB Ethernet, requires mii
device          aue             # ADMtek USB ethernet
device          axe             # ASIX Electronics USB ethernet
device          cue             # CATC USB ethernet
device          kue             # Kawasaki LSI USB ethernet

# FireWire support
device          firewire        # FireWire bus code
device          sbp             # SCSI over FireWire (Requires scbus and da)
device          fwe             # Ethernet over FireWire (non-standard!)