sandym / crossc

Building cross toolchain for (some) linux distros.

crossc

Building cross toolchain for linux distros.

The goal is to be able to build a x86-64 linux projects from an Apple Silicon chip.

Running the compiler from an x86-64 docker image result in a build time 2 to 3 times slower (!) because each invocation of gcc runs through rosetta while building with a native compiler is much faster (in my limited tests, building clang+tooling: arm64: 20 minutes, x86-64: 45 minutes).

This repo contains scripts to build cross toolchains for some specific linux distros.

Requirement

• cmake
• sudo port install autoconf autoconf-archive automake gmake gsed m4

Status

centos9 gcc-toolset-13

@todo:

• a fast linker ?
• build steps dependencies to fix:
  • the source code is re-copied every time cmake files change.
  • separation of duty between the 2 CMakeLists.txt is not clean

How to build

Make sure that /opt/cross exists and is writable.

> mkdir crossc/build
> cd crossc/build
> cmake -G Ninja -DCROSSC_PLATFORM=centos9-gcc13 ../.
> ninja

It will build and install the cross toolchain in /opt/cross/centos9-gcc13-x86_64.

/opt/cross/centos9-gcc13-x86_64/bin:

• ...