Build crosscompile environment for Motorola E680G

For my old cellphone can't satisfy my needs, I'm thirsty for a new one. After days's hunting, I have chosen Moto E680G for its Linux operating system and expansibility which enable me to develop my own software on it. But the first thing I should do is to build a crosscompile environment on my Laptop so that I can write code for it in SLED.