This repository contains the script needed to compile bare metal GCC for various architectures using Linux distributions. The GCC source is fetched from the master branch hence, contains all the bleeding edge changes.

Below are the packages you'll need

• Ubuntu or other Debian based distros

  Note: On Ubuntu 20.04, the default GCC version is gcc 9.3.x which (in my test cases) brought in a lot of unneeded regressions. This was however fixed by compiling the toolchain itself with GCC 10

  To install and set GCC 10 as the default compiler, you need to:

  sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y && sudo apt-get update

  sudo apt-get install flex bison ncurses-dev texinfo gcc gperf patch libtool automake g++ libncurses5-dev gawk subversion expat libexpat1-dev python-all-dev binutils-dev bc libcap-dev autoconf libgmp-dev build-essential pkg-config libmpc-dev libmpfr-dev autopoint gettext txt2man liblzma-dev libssl-dev libz-dev mercurial wget tar gcc-10 g++-10 zstd --fix-broken --fix-missing

• Arch Linux

  sudo pacman -S base-devel clang cmake git libc++ lld lldb ninja

Running this script is quite simple. We start by cloning this repository:

git clone https://github.com/mvaisakh/gcc-build.git gcc-build

./build-gcc.sh -a <architechture>

As of now, I only support arm, arm64 and x86 (compiles for x86_64 only). This list is subject to change as I receive requests.

Keep in mind that this script contains just the bare minimum prerequisites.

• Vaisakh (me) for writing this script.
• OS Dev Wiki for knowledge base.
• USBHost's Amazing GCC Build script for certain prerequisite dependencies.

My GCC Cross Compiler builds are automated and pushed biweekly i.e. on Sundays & Thursdays at 00:00 GMT+5:30 (IST). They are pushed to:

• ARM64
• ARM32
• X86_64 (Not built on cron anymore)

You're more than welcome to improve the contents within this script with a pull request. Enjoy :)