This is is pre-built compiler tool chain for various platforms cross-compiling for various ARM targets.

Prepare installation.

mkdir -p /embedded/arm-cortex
cd /embedded/arm-cortex

Install latest version.

wget https://launchpad.net/gcc-arm-embedded/5.0/5-2015-q4-major/+download/gcc-arm-none-eabi-5_2-2015q4-20151219-linux.tar.bz2
tar xjvf gcc-arm-none-eabi-5_2-2015q4-20151219-linux.tar.bz2

wget https://github.com/vanbwodonk/gcc-arm-embedded-build-armhf/releases/download/9-2019-q4-major/gcc-arm-none-eabi-9-2020-q1-update-armv7l-linux.tar.bz2
tar -xvf gcc-arm-none-eabi-9-2020-q1-update-armv7l-linux.tar.bz2
sudo mkdir /opt
sudo mv gcc-arm-none-eabi-9-2020-q1-update /opt

gcc-arm for Intel

gcc-arm for RPi