README:

1. To Build both Toolchain and Firmware image: 
   1.1 Host Ubuntu 12.04 or higher (Linux kernel 3.2.0) on x86 machine
   1.2 Compiling tool version: gcc 4.6.3 or higher, GNU Make version 3.81

2. Put the package GPL_PACKAGE_NAME.tar.bz2 to a directory such as /home/TP-LINK, then extract the compressed files.
   $ cd /home/TP-LINK
   $ tar xzvf GPL_PACKAGE_NAME.tar.bz2

To Build Firmware image:
   Go to GPL_PACKAGE_NAME build folder and execute make.
   
   $ cd /home/TP-LINK/gpl/build
   $ ./make.sh env_build
   $ ./make.sh all

   will generate the DEV_NAME_(xxx).bin, under gpl/BUILD_DIR/build_MODEL_NAME_UN/image folder. 
   xxx refers to flash or up_boot, with specific time-stamp and version info.