GCC Cross-Compiler Toolchain Build Script

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

Before we start

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:

apt-get update ```

```bash 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

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

Fedora

mpfr-devel gmp-devel libmpc-devel zlib-devel glibc-devel.i686 glibc-devel
binutils-devel g++ texinfo bison flex cmake which clang ninja-build lld ```

Usage

Running this script is quite simple. We start by cloning this repository: bash git clone https://github.com/KenHV/gcc-build.git gcc-build bash ./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.

Credits

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

Looking for precompiled toolchains?

My GCC cross-compiler builds are automated and pushed weekly i.e. on Sundays at 00:00 GMT (05:30 IST). They are pushed to:

ARM64
ARM32

Contributing to this repo

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