Yocto設定

概要

• https://www.yoctoproject.org/development/releases/
• Wrynose
  • https://docs.yoctoproject.org/brief-yoctoprojectqs/index.html
• Scarthgap
  • https://docs.yoctoproject.org/scarthgap/brief-yoctoprojectqs/index.html

設定

Wrynose

$ sudo apt-get install build-essential chrpath cpio debianutils diffstat file gawk gcc git iputils-ping libacl1 libc
$ locale --all-locales | grep en_US.utf8
$ sudo dpkg-reconfigure locales

$ git clone https://git.openembedded.org/bitbake
$ ./bitbake/bin/bitbake-setup init

※「./bitbake/bin/bitbake-setup init」を非対話で設定

$ ./bitbake/bin/bitbake-setup init --non-interactive poky-wrynose poky distro/poky machine/qemuarm64

$ source bitbake-builds/poky-wrynose/build/init-build-env
$ bitbake-config-build list-fragments
$ bitbake-config-build enable-fragment core/yocto/root-login-with-empty-password

Raspberry Pi用の設定

$ bitbake-layers layerindex-fetch meta-raspberrypi
($ git clone -b wrynose https://git.yoctoproject.org/meta-raspberrypi ../layers/meta-raspberrypi)
($ bitbake-layers add-layer ../layers/meta-raspberrypi)
$ bitbake-layers show-layers

$ bitbake-config-build enable-fragment machine/raspberrypi4-64

• conf/local.conf

LICENSE_FLAGS_ACCEPTED = "synaptics-killswitch"

$ bitbake core-image-minimal
($ runqemu snapshot)

$ cd build/tmp/deploy/images/raspberrypi4-64/
$ sudo bmaptool copy core-image-sato-raspberrypi4-64.rootfs.wic.bz2 /dev/sdX

Scarthgap

$ git clone -b scarthgap https://git.yoctoproject.org/poky
$ source poky/oe-init-build-env
$ bitbake-layers layerindex-fetch meta-raspberrypi
$ bitbake-layers show-layers

• conf/local.conf

MACHINE = "raspberrypi4-64"

$ bitbake core-image-minimal

kas

• kas-poky-rpi.yml

Scarthgap

header:
  version: 14

machine: raspberrypi4-64
distro: poky

target:
  - core-image-minimal

repos:
  poky:
    url: https://git.yoctoproject.org/poky
    branch: scarthgap
    layers:
      meta:
      meta-poky:
      meta-yocto-bsp:

  meta-openembedded:
    url: https://git.openembedded.org/meta-openembedded
    branch: scarthgap
    layers:
      meta-oe:
      meta-python:

  meta-raspberrypi:
    url: https://git.yoctoproject.org/meta-raspberrypi
    branch: scarthgap
    layers:
      .:

$ kas-container build kas-poky-rpi.yml

SDK

ビルド

~/yocto/build$ bitbake -c populate_sdk core-image-base

インストール

~/yocto/build/tmp/deploy/sdk/poky-glibc-x86_64-core-image-base-cortexa57-qemuarm64-toolchain-5.0.4.sh

環境設定

$ source /opt/poky/5.0.4/environment-setup-cortexa57-poky-linux

使用方法

$ pkg-config --list-all

自作アプリの追加

デバッグ

git clone -b kirkstone https://git.openembedded.org/meta-openembedded
bitbake-layers add-layer meta-oe
bitbake-layers add-layer meta-python

local.conf

CORE_IMAGE_EXTRA_INSTALL += " python3 apache2 gdb gdbserver"
DISTRO_FEATURES += " debuginfod"

debuginfod

• local.conf

gdb /bin/cat

ホスト

oe-debuginfod

gdbserver

local.conf

IMAGE_GEN_DEBUGFS = "1"
IMAGE_FSTYPES_DEBUGFS = "tar.bz2"

EXTRA_IMAGE_FEATURES:append = " tools-debug"

mkdir debugfs
cd debugfs
tar xjf build/tmp/deploy/images/qemuarm64/core-image-minimal-qemuarm64.rootfs.tar.bz2
tar xjf build/tmp/deploy/images/qemuarm64/core-image-minimal-qemuarm64.rootfs-dbg.tar.bz2

build-dir/tmp/sysrootfs/host/usr/bin/architecture/architecture-gdb

gdbserver localhost:1234 /bin/gzip -help

cd debugfs
aarch64-poky-linux-gdb
(gdb) set sysroot debugfs
(gdb) set substitute-path /usr/src/debug debugfs/usr/src/debug
(gdb) target remote IP-of-target:1234

• ~/.gdbinit

bitback bash
bitbake -c devshell bash
cd ..
scp packages-split/bash/bin/bash target:/bin/bash
cp -a packages-split/bash-dbg/* path/debugfs

ターゲット上でのみデバッグ

• local.conf

EXTRA_IMAGE_FEATURES:append = " tools-debug"
IMAGE_INSTALL:append = " packagename-dbg"
EXTRA_IMAGE_FEATURES:append = " dbg-pkgs"

DEBUG_BUILD = "1"

USBブート

• local.conf

CMDLINE_remove = "root=/dev/mmcblk0p2"
CMDLINE_append = "root=/dev/sda2"

NFSルート