UPD     include/linux/compile.h
  CC      init/version.o
  LD      init/built-in.o
  LD      .tmp_vmlinux1
drivers/built-in.o(.text+0x4cae1): In function `mgsl_isr_io_pin':
drivers/char/synclink.c:1357: undefined reference to `hdlc_set_carrier'
drivers/built-in.o(.text+0x5577e): In function `hdlcdev_open':
drivers/char/synclink.c:7851: undefined reference to `hdlc_open'
drivers/built-in.o(.text+0x5582a):drivers/char/synclink.c:7884: undefined reference to `hdlc_set_carrier'
drivers/built-in.o(.text+0x5588f): In function `hdlcdev_close':
drivers/char/synclink.c:7910: undefined reference to `hdlc_close'
drivers/built-in.o(.text+0x55929): In function `hdlcdev_ioctl':
drivers/char/synclink.c:8018: undefined reference to `hdlc_ioctl'
drivers/built-in.o(.text+0x55db7): In function `hdlcdev_init':
drivers/char/synclink.c:8109: undefined reference to `alloc_hdlcdev'
drivers/built-in.o(.text+0x55e35):drivers/char/synclink.c:8133: undefined reference to `register_hdlc_device'
drivers/built-in.o(.text+0x55eb5): In function `hdlcdev_exit':
drivers/char/synclink.c:8151: undefined reference to `unregister_hdlc_device'
drivers/built-in.o(.text+0x57c6e): In function `hdlcdev_open':
drivers/char/synclinkmp.c:1725: undefined reference to `hdlc_open'
drivers/built-in.o(.text+0x57d1a):drivers/char/synclinkmp.c:1758: undefined reference to `hdlc_set_carrier'
drivers/built-in.o(.text+0x57d7f): In function `hdlcdev_close':
drivers/char/synclinkmp.c:1784: undefined reference to `hdlc_close'
drivers/built-in.o(.text+0x57e19): In function `hdlcdev_ioctl':
drivers/char/synclinkmp.c:1892: undefined reference to `hdlc_ioctl'
drivers/built-in.o(.text+0x5829e): In function `hdlcdev_init':
drivers/char/synclinkmp.c:1983: undefined reference to `alloc_hdlcdev'
drivers/built-in.o(.text+0x58320):drivers/char/synclinkmp.c:2007: undefined reference to `register_hdlc_device'
drivers/built-in.o(.text+0x58395): In function `hdlcdev_exit':
drivers/char/synclinkmp.c:2025: undefined reference to `unregister_hdlc_device'
drivers/built-in.o(.text+0x59470): In function `isr_io_pin':
drivers/char/synclinkmp.c:2543: undefined reference to `hdlc_set_carrier'
make: *** [.tmp_vmlinux1] Error 1