make menuconfig完后make的时候出了问题,请教各位

root@mch-desktop:/mnt/hgfs/UbuntuShare/linux-2.6.27-android# make
make: Warning: File `.config' has modification time 31 s in the future
scripts/kconfig/conf -s arch/arm/Kconfig

*** Error during update of the kernel configuration.

make[2]: *** [silentoldconfig] Error 1
make[1]: *** [silentoldconfig] Error 2
  CHK     include/linux/version.h
make[1]: `include/asm-arm/mach-types.h' is up to date.
make: *** No rule to make target `include/config/auto.conf', needed by `include/config/kernel.release'.  Stop.
root@mch-desktop:/mnt/hgfs/UbuntuShare/linux-2.6.27-android#

本人使用的是Ubantu7.10,请各位帮忙指点,小弟感激不尽

缺少文件！