Re: [PATCH v2 8/8] Documentation: add howto build in macos

[Masahiro Yamada]

On Fri, Sep 6, 2024 at 8:01 PM Daniel Gomez via B4 Relay
<devnull+da.gomez.samsung.com@xxxxxxxxxx> wrote:
>
> From: Daniel Gomez <da.gomez@xxxxxxxxxxx>
>
> Add documentation under kbuild/llvm to inform about the experimental
> support for building the Linux kernel in macOS hosts environments.
>
> Signed-off-by: Daniel Gomez <da.gomez@xxxxxxxxxxx>


Instead, you can add this instruction to:

https://github.com/bee-headers/homebrew-bee-headers/blob/main/README.md





> ---
>  Documentation/kbuild/llvm.rst | 78 +++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 78 insertions(+)
>
> diff --git a/Documentation/kbuild/llvm.rst b/Documentation/kbuild/llvm.rst
> index 6dc66b4f31a7..de3bde925793 100644
> --- a/Documentation/kbuild/llvm.rst
> +++ b/Documentation/kbuild/llvm.rst
> @@ -186,6 +186,84 @@ yet. Bug reports are always welcome at the issue tracker below!
>       - Supported
>       - ``LLVM=1``
>
> +Experimental Build in macOS
> +---------------------------
> +
> +Building on macOS with LLVM is experimental. This section provides steps to
> +install dependencies via Homebrew, set up the environment, and start the build
> +process.
> +
> +1. **Create a Case-Sensitive Volume**
> +
> +   For fetching and building the project, you need a case-sensitive volume. Use the following
> +   command to create one:
> +
> +   .. code-block:: shell
> +
> +      diskutil apfs addVolume /dev/disk<N> "Case-sensitive APFS" linux
> +
> +   Replace `/dev/disk<N>` with the appropriate disk identifier.
> +
> +2. **Install Build Dependencies**
> +
> +Use Homebrew to install the required build dependencies.
> +
> +- **Core Utilities**: `coreutils`, `findutils`, `gnu-sed`, `gnu-tar`, `grep`,
> +  `llvm`, `make`, and `pkg-config`.
> +
> +   .. code-block:: shell
> +
> +      brew install coreutils findutils gnu-sed gnu-tar grep llvm make pkg-config
> +
> +- **Bee Headers**: Install byteswap, elf and endian headers using the
> +  `Bee Headers Project <https://github.com/bee-headers/headers>`_.
> +
> +   .. code-block:: shell
> +
> +      brew tap bee-headers/bee-headers
> +      brew install bee-headers/bee-headers/bee-headers
> +
> +   After installation, verify the `CFLAGS` with `pkg-config`:
> +
> +   .. code-block:: shell
> +
> +      pkg-config --cflags bee-headers
> +      -I/opt/homebrew/Cellar/bee-headers/0.1/include
> +
> +3. **Configure the PATH**
> +
> +   Include all the required GNU tools and LLVM in your `PATH`. This ensures that
> +   the necessary tools are available during the build process.
> +
> +   .. code-block:: shell
> +
> +      PATH="/opt/homebrew/opt/coreutils/libexec/gnubin:$PATH"
> +      PATH="/opt/homebrew/opt/findutils/libexec/gnubin:$PATH"
> +      PATH="/opt/homebrew/opt/gnu-sed/libexec/gnubin:$PATH"
> +      PATH="/opt/homebrew/opt/gnu-tar/libexec/gnubin:$PATH"
> +      PATH="/opt/homebrew/opt/grep/libexec/gnubin:$PATH"
> +      PATH="/opt/homebrew/opt/make/libexec/gnubin:$PATH"
> +      PATH="/opt/homebrew/opt/llvm/bin:$PATH"
> +
> +Building the Project
> +--------------------
> +
> +Once the environment is set up, you can start the build process using LLVM. Run
> +the following commands to initiate the build:
> +
> +.. code-block:: shell
> +
> +   make LLVM=1 allyesconfig
> +   make LLVM=1 -j$(nproc)
> +
> +Supported in macOS
> +~~~~~~~~~~~~~~~~~~
> +
> +At the moment, only arm64 is supported and tested with `allyesconfig` Makefile
> +configuration target. Other Kconfig options not included in `allyesconfig`
> +target and architectures may be supported as well as support in macOS is based
> +on LLVM effort and maintenance.
> +
>  Getting Help
>  ------------
>
>
> --
> 2.46.0
>
>


--
Best Regards
Masahiro Yamada