Tools to unpack system.img, patch the framework.jar, and repack it under UBUNTU

1. cd to the root directory.
2. Place the system.img file in this directory.
3. source envsetup.sh
4. run_from_scratch.sh

Compiling mkyaffs2image for osx

1. Download yaffs2-source.tar from http://code.google.com/p/fatplus/downloads/list

2. Add following before last #endif in devextras.h

typedef long long       __kernel_loff_t;
typedef __kernel_loff_t loff_t;

3. cd yaffs2/utils && make && cd ../.. && cp yaffs2/utils/mkyaffs2image osx_bin