On 2/24/20 9:41 AM, Nick Desaulniers wrote:
> Added to kbuild documentation. Provides more official info on building
> kernels with Clang and LLVM than our wiki.
>
> Suggested-by: Kees Cook <keescook@xxxxxxxxxxxx>
> Reviewed-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
> Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
> ---
> Documentation/kbuild/index.rst | 1 +
> Documentation/kbuild/llvm.rst | 80 ++++++++++++++++++++++++++++++++++
> 2 files changed, 81 insertions(+)
> create mode 100644 Documentation/kbuild/llvm.rst
>
> diff --git a/Documentation/kbuild/index.rst b/Documentation/kbuild/index.rst
> index 0f144fad99a6..3882bd5f7728 100644
> --- a/Documentation/kbuild/index.rst
> +++ b/Documentation/kbuild/index.rst
> @@ -19,6 +19,7 @@ Kernel Build System
>
> issues
> reproducible-builds
> + llvm
>
> .. only:: subproject and html
>
> diff --git a/Documentation/kbuild/llvm.rst b/Documentation/kbuild/llvm.rst
> new file mode 100644
> index 000000000000..68ae022aebc0
> --- /dev/null
> +++ b/Documentation/kbuild/llvm.rst
> @@ -0,0 +1,80 @@
> +==============================
> +Building Linux with Clang/LLVM
> +==============================
> +
> +This document covers how to build the Linux kernel with Clang and LLVM
> +utilities.
> +
> +About
> +-----
> +
> +The Linux kernel has always traditionally been compiled with GNU toolchains
> +such as GCC and binutils. On going work has allowed for `Clang
Ongoing
> +<https://clang.llvm.org/>`_ and `LLVM <https://llvm.org/>`_ utilities to be
> +used as viable substitutes. Distributions such as `Android
> +<https://www.android.com/>`_, `ChromeOS
> +<https://www.chromium.org/chromium-os>`_, and `OpenMandriva
> +<https://www.openmandriva.org/>`_ use Clang built kernels. `LLVM is a
> +collection of toolchain components implemented in terms of C++ objects
> +<https://www.aosabook.org/en/llvm.html>`_. Clang is a front-end to LLVM that
> +supports C and the GNU C extensions required by the kernel, and is pronounced
> +"klang," not "see-lang."
Thanks for the info.
--
~Randy
