How can set the compiler for jetons TX1 L4T 28.2?

How can set the compiler for jetons TX1 L4T 28.2?
and How can compile the jetons TX1 L4T 28.2 kernel source code?

gcc should already be there after a normal install.

nvidia@tegra-ubuntu:~$ gcc --version
gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609

For building kernel, check: http://www.jetsonhacks.com/2017/07/31/build-kernel-ttyacm-module-nvidia-jetson-tx2/.