에러가 나는데 왜인지 모르겠군요..그리구 중간에 warning도 많이 뜹니다.
 ld -m elf_i386 -T /usr/src/linux-2.4.2/arch/i386/vmlinux.lds -e stext arch/i386/kernel/head.o arch/i386/kernel/init_tas
k.o init/main.o init/version.o         --start-group
        arch/i386/kernel/kernel.o arch/i386/mm/mm.o kernel/kernel.o mm/mm.o fs/fs.o ipc/ipc.o
        drivers/block/block.o drivers/char/char.o drivers/misc/misc.o drivers/net/net.o drivers/media/media.o  driv
ers/char/drm/drm.o drivers/net/fc/fc.o drivers/net/tokenring/tr.o drivers/ide/idedriver.o drivers/scsi/scsidrv.o drivers
/cdrom/driver.o drivers/pci/driver.o drivers/pcmcia/pcmcia.o drivers/net/pcmcia/pcmcia_net.o drivers/pnp/pnp.o drivers/v
ideo/video.o drivers/usb/usbdrv.o arch/i386/math-emu/math.o         net/network.o         /usr/src/linux-2.4.2/a
rch/i386/lib/lib.a /usr/src/linux-2.4.2/lib/lib.a /usr/src/linux-2.4.2/arch/i386/lib/lib.a         --end-group    
     -o vmlinux drivers/pcmcia/pcmcia.o: In function `yenta_close':
drivers/pcmcia/pcmcia.o(.text+0x9a65): undefined reference to `del_timer_sync'
    /usr/src/linux-2.4.2/include/asm/processor.h:78: warning: `cpu_data' redefined
/usr/src/linux-2.4.2/include/linux/modules/i386_ksyms.ver:76: warning: this is the location of the previous definition
In file included from /usr/src/linux-2.4.2/include/linux/sched.h:23,
                 from /usr/src/linux-2.4.2/include/linux/mm.h:4,
                 from /usr/src/linux-2.4.2/include/linux/poll.h:10,
                 from cpuid.c:35:
/usr/src/linux-2.4.2/include/linux/smp.h:80: warning: `smp_num_cpus' redefined
/usr/src/linux-2.4.2/include/linux/modules/i386_ksyms.ver:80: warning: this is the location of the previous definition
/usr/src/linux-2.4.2/include/linux/smp.h:87: warning: `smp_call_function' redefined
/usr/src/linux-2.4.2/include/linux/modules/i386_ksyms.ver:96: warning: this is the location of the previous definition
/usr/src/linux-2.4.2/include/linux/smp.h:88: warning: `cpu_online_map' redefined
/usr/src/linux-2.4.2/include/linux/modules/i386_ksyms.ver:82: warning: this is the location of the previous definition
In file included from /usr/src/linux-2.4.2/include/linux/sched.h:80,
                 from /usr/src/linux-2.4.2/include/linux/mm.h:4,
                 from /usr/src/linux-2.4.2/include/linux/poll.h:10,
                 from cpuid.c:35:
/usr/src/linux-2.4.2/include/linux/timer.h:34: warning: `del_timer_sync' redefined
/usr/src/linux-2.4.2/include/linux/modules/ksyms.ver:506: warning: this is the location of the previous definition
gcc -D__KERNEL__ -I/usr/src/linux-2.4.2/include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -fno-strict-aliasing 
-pipe  -march=i386    -c -o apm.o apm.c rm -f kernel.o