Qt5 (minimal) on Beaglebone, with Yocto

Introduction

• This post publishes the method to build Qt5 for Beaglebone. To build Qt5 for Beaglebone, the below repos are needed:

• pokymeta-oemeta-timeta-qt5

Downloading the configuration files

$ git clone git://git.yoctoproject.org/poky$ cd poky$ git clone

https://github.com/openembedded/meta-oe$ git clone git://git.yoctoproject.org/meta-ti$ git clone git@github.com:prabindh/meta-

qt5.git

Adding qt5 to minimal image

• Add below line to conf/local.conf (notice the space at start)

• IMAGE_INSTALL_append = " qtbase qtbase-tools qtbase-plugins"

Setting Beaglebone as target

• Specify Beaglebone as target, as below, in conf/local.conf

• MACHINE ?= "beaglebone"BBMASK ?= ".*/meta-ti/recipes-misc/(images|payload)/"

Adding meta-ti and meta-oe layers to Bitbake build system

• Add meta-oe and meta-ti, so that it looks like below in conf/bblayers.conf

• BBFILES ?= ""BBLAYERS ?= " \${TOPDIR}/../meta \${TOPDIR}/../meta-yocto \${TOPDIR}/../meta-yocto-bsp \${TOPDIR}/../meta-oe/meta-oe \${TOPDIR}/../meta-ti \"

Building the image

$ source oe-init-build-env$ bitbake core-image-minimal• Creating SD card:• The images (MLO, u-boot, dt, uImage, and

rootfs) are available at below folder,• <>/poky/build/tmp/deploy/images• Use mkmmc scripts (or any other standard SD

format scripts) to burn these images to SD card.

Running the Qt5 examples with minimal plugin

• Boot the Beaglebone, and login in as root.• $>export QT_DEBUG_BACKINGSTORE=1

$>export QT_QPA_PLATFORM=minimal$>cd /usr/bin/qt5/examples/

• UI/widget examples (ex, calculator) can be run and output observed from the png file stored in the same folder.

Yocto build configuration used• There was an update after this, but below should give a reference.• BB_VERSION = "1.17.1"

BUILD_SYS = "i686-linux"NATIVELSBSTRING = "Ubuntu-12.04"TARGET_SYS = "arm-poky-linux-gnueabi"MACHINE = "beaglebone"DISTRO = "poky"DISTRO_VERSION = "1.3+snapshot-20130403"TUNE_FEATURES = "armv7a vfp neon"TARGET_FPU = "vfp-neon"metameta-yocto = "master:c0910f26ea0d692c6d22f2e3f87cf710b31fdf0a"meta-oe = "master:af6c39379dbe6822d1457498e53747ed63bdbb65"meta-ti = "master:ca0f68d71b08de156c4424324466aab0ebc7296f"meta-yocto-bsp = "master:c0910f26ea0d692c6d22f2e3f87cf710b31fdf0a"

TODO and References• TODO:• - fonts are not installed to target, so no text appears• - eglfs with virtual/gles2 configuration update • - wayland update• - Qt 5.1 update• - webkit update• - Beaglebone itself runs only at 250 MHz (!) in the default Yocto core-

image-minimal. To update with TI scripts for a better performance profile

• References:• https://gist.github.com/errordeveloper/4056193

https://github.com/meta-qt5/• http://gpupowered.org/node/20