我从网上下的一个2440的CE 6.0的BSP包，基于它想构建一个CE 6.0的系统，但是编译出错：
mdk2440a_ARMV4I_Debug\postproc\PBUserProjects.reg
fmerge for Windows CE (Release) (Built on Apr 5 2006 11:32:16)
Error - variable "PCI_BUS_ROOT" not defined
Error on H:\OSDesigns\QQ2440\QQ2440\RelDir\smdk2440a_ARMV4I_Debug\postproc\PBUserProjects.reg:131
[$(PCI_BUS_ROOT)\Template\ehci]
makeimg: FATAL ERROR: Command returned non-zero exit code 1 (dec).
makeimg: FATAL ERROR: Command returned non-zero exit code 1 (dec).
BLDDEMO: QQ2440 build complete.
QQ2440 - 4 error(s), 28 warning(s)
========== Build: 0 succeeded or up-to-date, 1 failed, 0 skipped ==========
请问有没有人知道是什么原因？
