Toolchains

Toolchains can be specified only by their name, or with a version number attached. For example, clang will use whatever clang binary you have in your $PATH, while clang-10 will specifically use clang version 10.

gcc

This toolchain will use gcc as compiler. It is the default if you don't request a specific toolchain. Specify gcc-N for requesting specific gcc versions.

clang

This toolchain uses clang as compiler, but the GNU binutils tools for assembling and linking. Specify clang-N for specific versions. Special variants of clang are also available:

Variant	Description
clang-nightly	Nightly clang builds, updated daily
clang-android	The exact clang compiler used for official Android builds

llvm

This toolchain does a full LLVM build, i.e. one with LLVM=1: compile with clang, and assemble/link with the LLVM tools. Specify llvm-N for requesting specific LLVM versions. As with clang, the llvm-nightly and llvm-android are also available.

rustgcc

This toolchain uses gcc as C compiler, and also includes the tools required to build the kernel with Rust support.

Alias: rust

rustclang

This toolchain uses clang as C compiler, and also includes the tools required to build the kernel with Rust support.

rustllvm

This toolchain does a full LLVM build for C code (i.e. LLVM=1), and also includes the tools required to build the kernel with Rust support.

korg-clang

This toolchain uses clang as compiler, but the GNU binutils tools for assembling and linking. Specify korg-clang-N for specific versions. The toolchain binaries are obtained from kernel.org.

korg-llvm

This toolchain does a full LLVM build, i.e. one with LLVM=1: compile with clang, and assemble/link with the LLVM tools. Specify korg-llvm-N for requesting specific LLVM versions. The toolchain binaries are obtained from kernel.org.

korg-gcc

This toolchain uses gcc as compiler. To specify a particular version, use korg-gcc-N, where N is >= 8. The toolchain binaries are obtained from kernel.org.

NOTE: korg-gcc toolchain is not supported in null runtime.