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install/build yoto for raspberryPi.md

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Raspberry Pi with Yocto

Install dependency:

su
pacman -S diffstat chrpath cpio
exit

configure locals:

su
locale -a
edn /etc/locale.gen
  unselect at minimum en_US.UTF-8 UTF-8
locale-gen
exit
  1. set-up working directory:
mkdir -p RASPBERRYPI/BSP
cd RASPBERRYPI/BSP
  1. Clone of Yocto:
git clone -b krogoth git://git.yoctoproject.org/poky.git
cd poky/
  1. Clone of meta de Raspberry Pi:
git clone -b master git://git.yoctoproject.org/meta-raspberrypi
  1. Clone of meta Open Embedded:
git clone -b krogoth https://github.com/openembedded/meta-openembedded.git
  1. Force python 2.7:
mkdir pythonBase2
cd pythonBase2
ln -s /usr/bin/python2.7 python
ln -s /usr/bin/python2.7-config python-config
export PATH=`pwd`:$PATH
cd ..
  1. Initialize the configuration:
source oe-init-build-env raspberryPiBuild/
  1. update configuration file:

Open: conf/local.conf

find: MACHINE ??= "qemux86"

Remplace with: MACHINE ?= "raspberrypi2"

find: PACKAGE_CLASSES ?= "package_rpm"

Remplace with: PACKAGE_CLASSES ?= "package_deb"

Add at the end:

BBMASK = "meta-raspberrypi/recipes-multimedia/libav|meta-raspberrypi/recipes-core/systemd"

Open: conf/bblayers.conf

find:

BBLAYERS ?= " \
  ${HOME}/RASPBERRYPI/BSP/poky/meta \
  ${HOME}/RASPBERRYPI/BSP/poky/meta-yocto \
  ${HOME}/RASPBERRYPI/BSP/poky/meta-yocto-bsp \
  "

Remplace with:

BBLAYERS ?= " \
  ${HOME}/RASPBERRYPI/BSP/poky/meta \
  ${HOME}/RASPBERRYPI/BSP/poky/meta-yocto \
  ${HOME}/RASPBERRYPI/BSP/poky/meta-yocto-bsp \
  ${HOME}/RASPBERRYPI/BSP/poky/meta-raspberrypi \
  ${HOME}/RASPBERRYPI/BSP/poky/meta-openembedded/meta-oe \
  ${HOME}/RASPBERRYPI/BSP/poky/meta-openembedded/meta-networking \
  "
  1. Build basic image:

Simply run:

bitbake core-image-minimal

display result:

ls -l tmp/deploy/images/raspberrypi/
  1. Burn image on the sd card:
cd tmp/deploy/images/raspberrypi/
sudo dd bs=1M if=core-image-minimal-raspberrypi.rpi-sdimg of=/dev/mmcblk0
  1. All is ready:

login: root pasword root

some yocto options:

in the file: conf/local.conf

mumber of distinct lib to compile at the same time

BB_NUMBER_THREADS = "4"

number of thread fore eache build

PARALLEL_MAKE = "-j 4"

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