Freedom-e-sdk cann't install toolchain

hello, today I download the freedom-e-sdk from github in my new ubuntu system, but when I use the command make tools , it creat a error like the picture, how can I solve this problem???

You need to insure that your Ubuntu has all of the required packages installed. I see for example that you have not installed bison, which is required. You can read all about the requirements in the README file :smirk: