说明：  构建嵌入式Linux系统的详细文档，系统启动bootloader的编写，GNU交叉工具链的构建，u-boot的移植,linux2.6内核的移植,应用程序的移植 NAND flash驱动的编写与移植
(Embedded Linux System Construction of the detailed document, prepared by the bootloader to boot the system, GNU cross tool chain build, u-boot transplant, linux2.6 core of the transplant, the application of transplantation NAND flash-driven preparation and transplantation)