Need a bit of clarification on micro-ecc installation instructions

[cpeng]

on the page

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fsdk_nrf5_v16.0.0%2Flib_crypto_backend_micro_ecc.html&anchor=lib_crypto_backend_micro_ecc_install

step one:

"Install version 4.9-2015-q3-update of the GCC compiler toolchain for ARM. You can use ARM's Launchpad to find the toolchain for your operating system."

I am on ubuntu system, after i downloaded "gcc-arm-none-eabi-5_4-2016q3-20160926-linux.tar.bz2", which directory should i put it?

Also is this the right command to install?

tar xjf gcc-arm-none-eabi-5_4-2016q3-20160926-linux.tar.bz2

EDIT: never mind i found the correct install path should be

/usr/local/gcc-arm-none-eabi-7-2018-q2-update/bin/

as indicated in

/components/toolchain/gcc/Makefile.posix

I think it would be helpful to mention this path in your infocenter page. People would grab all kinds of versions of arm gcc from the internet and when they make file it will throw errors complaining cant find the right version.