undefined reference to `accent_table_size'

编译linux内核出现的错误：

drivers/char/char.o(.text+0xa7bc): In function `vt_ioctl':

: undefined reference to `accent_table_size'

drivers/char/char.o(.text+0xa7c0): In function `vt_ioctl':

: undefined reference to `accent_table'

drivers/char/char.o(.text+0xb1d4): In function `do_kdsk_ioctl':

: undefined reference to `key_maps'

drivers/char/char.o(.text+0xb1e8): In function `do_kdsk_ioctl':

: undefined reference to `keymap_count'

drivers/char/char.o(.text+0xb66c): In function `do_kdgkb_ioctl':

: undefined reference to `func_table'

drivers/char/char.o(.text+0xb674): In function `do_kdgkb_ioctl':

: undefined reference to `funcbufsize'

drivers/char/char.o(.text+0xb678): In function `do_kdgkb_ioctl':

: undefined reference to `funcbufleft'

drivers/char/char.o(.text+0xb67c): In function `do_kdgkb_ioctl':

: undefined reference to `funcbufptr'

drivers/char/char.o(.text+0xb680): In function `do_kdgkb_ioctl':

: undefined reference to `func_buf'

drivers/char/char.o(.text+0x130c0): In function `setkeycode':

: undefined reference to `pckbd_setkeycode'

drivers/char/char.o(.text+0x130c4): In function `getkeycode':

: undefined reference to `pckbd_getkeycode'

drivers/char/char.o(.text+0x13190): In function `handle_scancode':

: undefined reference to `pckbd_translate'

drivers/char/char.o(.text+0x13230): In function `kbd_processkeycode':

: undefined reference to `pckbd_unexpected_up'

drivers/char/char.o(.text+0x13474): In function `kbd_processkeycode':

: undefined reference to `key_maps'

drivers/char/char.o(.text+0x13a88): In function `handle_diacr':

: undefined reference to `accent_table_size'

drivers/char/char.o(.text+0x13a90): In function `handle_diacr':

: undefined reference to `accent_table'

drivers/char/char.o(.text+0x13a94): In function `handle_diacr':

: undefined reference to `accent_table'

drivers/char/char.o(.text+0x13ac8): In function `do_fn':

: undefined reference to `func_table'

drivers/char/char.o(.text+0x13e60): In function `compute_shiftstate':

: undefined reference to `key_maps'

drivers/char/char.o(.text+0x13fb0): In function `do_slock':

: undefined reference to `key_maps'

drivers/char/char.o(.text+0x14114): In function `kbd_bh':

: undefined reference to `pckbd_leds'

drivers/char/char.o(.text.init+0xde4): In function `kbd_init':

: undefined reference to `pckbd_init_hw'

make: *** [vmlinux] Error 1

/************************************************/

解决方法：

    根据网上所查到的方法，检查下driver/char/Makefile文件中的，ifeq($(ARCH)),arm)下面的“KERYMAP:=”和“KEYBD:=”是否为空，如果是的话，把defkeymap.o和pc_keyb.o写上去。修改后的代码如下：KERYMAP:=defkeymap.o,KEYBD:=pc_keyb.o。