重新修改编译Android NDK

[nowhyis]

我要重新编译NDK,
按NDK自带文档：“android-ndk-r6\docs\DEVELOPMENT.html”，
从这里开始的：
Here are more details on how to do that:
3.a/ Download + patching + packaging sources:
3.b/ Build the binaries:
可是当执行完脚本 “$NDK/build/tools/rebuild-all-prebuilt.sh --toolchain-pkg=<file>”后，出现以下ERROR：
==============================================================================================
ERROR: Source directory doesn't support these ARCHs:arm
.
.
.
ERROR: Invalid sysroot path: /tmp/ndk-Administrator/build/platforms/android-0/arch-arm
Use --sysroot=<path> to indicate a valid ont.
ERROR: Could not build arm-linux-androideabi-4.4.3 toolchain!
===============================================================================================
哪位大神指点一下小弟，不甚感激！