http://zh.wikibooks.org/zh/Openwrt%E4%B8%AD%E6%96%87%E6%89%8B%E5%86%8C
Build dependency: Please install ncurses. (Missing libncurses.so or ncurses.h)
Build dependency: Please install the openssl library (with development headers)
Prerequisite check failed. Use FORCE=1 to override.
make: *** [staging_dir/host/.prereq-build] Error 1
http://www.acme-dot.com/building-openwrt-14-07-barrier-breaker-on-ubuntu-and-os-x/
http://www.linuxidc.com/Linux/2011-06/37739p2.htm
