For a manual on how to install crosstool see our wiki https://github.com/esp8266/esp8266-wiki/wiki/Compiler
Online community http://www.esp8266.com supporting all aspects of the ESP8266 and ESP8266EX
For more info see our wiki https://github.com/esp8266/esp8266-wiki/wiki