Re: Building Yocto on M1 Mac


Robert Joslyn
 

On Feb 13, 2022, at 6:56 AM, Abhijeet Tripathi <abhijeettripathi3003@...> wrote:


On Sun, Feb 13, 2022 at 7:09 PM Anders Montonen <Anders.Montonen@...> wrote:
Hi,

On 13 Feb 2022, at 14:24, Abhijeet Tripathi <abhijeettripathi3003@...> wrote:

Hello yocto-devs,

I'm new to the yocto project and trying to set up a build environment on my M1 Mac which is arm64 architecture.

I'm following the steps as mentioned in below link:
https://github.com/crops/docker-win-mac-docs/wiki/Mac-Instructions

But it is always pulling up containers based on amd64 architecture. Are there any updated steps/link to set up a build environment specific to M1 Mac(arm64)?
Looking at Docker Hub, none of the published Crops containers are built for ARM64. You can try building the containers yourself, making sure to pick base distros that are available for ARM64.

Note that there are plenty of reports of Docker performing poorly on Macs, probably because of the file system implementation. You may be better off using a full VM via e.g. UTM.

I initially started with UTM but the problem with virtual machines is that we can only use half the resources of the machine.
This makes the builds slower, so I was looking at the container way.

Can you point me to any documentation which I can use to build customized containers for yocto builds?

Thanks,
Abhijeet
A Dockerfile like this works for me:

FROM ubuntu:20.04

ARG DEBIAN_FRONTEND=noninteractive
ENV LANG=en_US.UTF-8

RUN apt-get update \
&& apt-get -y install \
locales \
sudo \
vim-tiny \
&& sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen \
&& locale-gen \
&& apt-get -y install \
binutils \
build-essential \
chrpath \
cpio \
diffstat \
gawk \
git \
lz4 \
python3 \
python3-distutils \
wget \
zstd \
&& rm -rf /var/lib/apt/lists/*

RUN useradd -m -G sudo --uid=1000 -s /bin/bash yocto
RUN install -d -o yocto -g yocto /yocto
USER yocto

Save that to a file called “Dockerfile”. You can build a container called “yocto” with:
docker build -t yocto .

You can run this with something like:
docker run —rm —mount type=volume,src=yocto,dst=/yocto -it yocto

Once in the container, go to /yocto to do work within a Docker volume. I have an M1 MacBook Air and can use this container to run builds. As others have said, it’s not fast, but it does work if it’s what you have. Normally I don’t do builds on the MacBook, I usually ssh into my Linux desktop and do my work there.

You got me curious though, so I did a quick comparison of building on my MacBook Air and my desktop. Using the container built with that Dockerfile, I ran this sequence (the download is separate to avoid download time, which is highly variable):

git clone https://git.yoctoproject.org/poky.git -b honister
cd poky
. oe-init-build-env
bitbake core-image-minimal —runonly=fetch
rm -rf tmp/ sstate-cache/
time bitbake core-image-minimal

On my 2020 M1 MacBook Air (8 cores, 16 GB RAM, docker using 8 cores and 8 GB), the build took 84 minutes. My desktop with an AMD Ryzen 9 3950X (16 cores, 64 GB RAM) it takes 21 minutes.

Docker performance has always been bad for me on MacOS, so it wouldn’t surprise me if it’s faster to use a normal VM than docker (which uses a VM internally too).

Robert

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