Setting up build environment for compiling AirOS 5.3.3 SDK

SDK available @ http://www.ubnt.com/support/sdk.php

[halli@centos software]$ tar xzvf SDK.UBNT.v5.3.3.tar.gz
[halli@centos software]$ cd SDK.UBNT.v5.3.3/openwrt
[halli@centos openwrt]$ cd package/
[halli@centos package]$ cd ubnt-base-files/files/

[halli@centos files]$ ls
bin  etc  init  lib  sbin  usr

[halli@centos files]$ cd usr/etc/

[halli@centos etc]$ ls
cardlist.txt    hotplug.d   protocols     system-3g.cfg    system-e6c2.cfg
ethertypes      init.d      rc.d          system.cfg       system-soho.cfg
fstab           inittab     server.crt    system-e402.cfg  system-wsoho.cfg
group           lighttpd    server.key    system-e4a2.cfg  udhcpc
host.conf       login.defs  services      system-e4b2.cfg  udhcpc_services
hosts           passwd      shells        system-e6a2.cfg
hotplug2.rules  profile     startup.list  system-e6b2.cfg

[halli@centos software]$ cd ~/software/SDK.UBNT.v5.3.3/openwrt
[halli@centos openwrt]$ make
Checking 'working-make'... ok.
Checking 'case-sensitive-fs'... ok.
Checking 'getopt'... ok.
Checking 'fileutils'... ok.
Checking 'working-gcc'... ok.
Checking 'working-g++'... ok.
Checking 'ncurses'... ok.
Checking 'zlib'... ok.
Checking 'gawk'... ok.
Checking 'flex'... ok.
Checking 'unzip'... ok.
Checking 'bzip2'... ok.
Checking 'patch'... ok.
Checking 'perl'... ok.
Checking 'python'... ok.
Checking 'wget'... ok.
Checking 'gnutar'... ok.
Checking 'svn'... ok.
Checking 'gnu-find'... ok.
Checking 'getopt-extended'... ok.
Checking 'non-root'... ok.
++ mkdir -p software/SDK.UBNT.v5.3.3/openwrt/staging_dir/toolchain-mips_gcc4.1.2
++ cd software/SDK.UBNT.v5.3.3/openwrt/staging_dir/toolchain-mips_gcc4.1.2
++ mkdir -p bin lib include stamp
Collecting package info: done
Collecting target info: done
 make[1] world
 make[2] tools/install
 make[3] -C tools/sed compile
 make[3] -C tools/sed install
 make[3] -C tools/sstrip compile
 make[3] -C tools/sstrip install
 make[3] -C tools/ipkg-utils compile
 make[3] -C tools/ipkg-utils install
  ~~~~~~~~~~~~
 make[3] -C tools/quilt compile
 make[3] -C tools/quilt install
 make[3] -C tools/ubnt-mkfwimage compile
 make[3] -C tools/ubnt-mkfwimage install
 make[2] toolchain/install
 make[3] -C toolchain/kernel-headers prepare
 make[3] -C toolchain/uClibc prepare
 make[3] -C toolchain/binutils prepare
 make[3] -C toolchain/binutils compile
 make[3] -C toolchain/binutils install
 make[3] -C toolchain/gcc prepare
 make[3] -C toolchain/gcc compile
 make[3] -C toolchain/uClibc compile
 make[3] -C toolchain/gcc install
 make[3] -C toolchain/uClibc install
 make[2] target/compile
 make[3] -C target/linux compile
 make[2] package/cleanup
 make[2] package/compile
 make[3] -C package/base-files compile
 make[3] -C package/busybox compile
 make[3] -C package/linux-atm compile
 make[3] -C package/libpcap compile
 make[3] -C package/ppp compile
 make[3] -C package/dnsmasq compile
 ~~~~~~~~~~~~
 make[3] -C package/wpa_supplicant install
 make[3] -C package/zlib install
 make[2] package/rootfs-prepare
 make[3] package/preconfig
 make[2] target/install
 make[3] -C target/linux install
 make[2] package/index

Copy FW to your device & initiate update process:

[halli@centos openwrt]$ scp bin/XM.v5.3.3.sdk.bin ubnt@ap-temp.bdsm.local:/tmp/fwupdate.bin

Log into your device and start the update:
 
[ubnt@ap-temp]$ /sbin/ubntbox fwupdate.real -m /tmp/fwupdate.bin -d

In a few minutes, after the unit comes back up, log into it again and
issue the command to reset the device to the AirOS defaults:

[ubnt@ap-temp]$ cfgmtd -f /usr/etc/system.cfg -w && reboot