Portable Linux GCC

Native GNU/Linux GCC toolchain that depends on old glibc, and targets (relatively) new, static glibc that runs on old kernel.

Build

1. Prepare build environment:

   podman build -t portable-linux-gcc/buildenv support/buildenv

2. Launch build environment:

   podman run -it --rm \
     --cap-add=sys_admin \
     -v $PWD:/mnt -w /mnt \
     portable-linux-gcc/buildenv

   To expose build directories for debugging:

   podman run -it --rm \
     --cap-add=sys_admin \
     -v $PWD:/mnt -w /mnt \
     -v $PWD/build:/tmp/build \
     -v $PWD/layer:/tmp/layer \
     portable-linux-gcc/buildenv

3. In the build environment, run:

   ./main.py -a <arch>

Available architectures:

Arch	Host glibc	Target glibc	Min. kernel	Typ. distro.
x86_64	2.13	2.43	3.2	Debian 7, Ubuntu 12.04, EL 7
x86_64.v3	2.13	2.43	3.2	Debian 7, Ubuntu 12.04, EL 7
aarch64	2.17	2.43	3.7	— (baseline)*
riscv64	2.27	2.43	4.15	— (baseline)*
loong64	2.36	2.43	5.19	— (baseline)*

* aarch64, riscv64, loong64: The toolchains target their baselines (the first versions of Linux and glibc that support the architecture).

Legacy architectures:

Arch	Host glibc	Target glibc	Min. kernel	Typ. distro.
x86_64-2010	2.11	2.25	2.6.32	Debian 6, Ubuntu 10.04, EL 6
x86_64-2007	2.3.6	2.19	2.6.16	Debian 4, Ubuntu 6.10, EL 5
i686	2.13	2.43	3.2	Debian 7, Ubuntu 12.04, EL 7
i686-2010	2.11	2.25	2.6.32	Debian 6, Ubuntu 10.04, EL 6
i686-2007	2.3.6	2.19	2.6.16	Debian 4, Ubuntu 6.10, EL 5