Cross compiling QT width piomxtextures

Based on https://wiki.qt.io/RaspberryPi2EGLFS, https://thebugfreeblog.blogspot.com and https://github.com/raspberrypi/tools

Notes

Uses the arm-rpi-4.9.3-linux-gnueabihf toolchain
Tested only on RPi 3 (but should support pi1/pi2 just fine)
Tested on clean Ubuntu 16.04 (64 bit) as host and clean Raspbian Jessie Lite 2017-01-11 on device
Make sure to use 64 bit host OS as that's what the used toolchain is built for
To use the toolchain once downloaded you must run source env.sh first to setup environment variables.

Guide

on host install tools and clone this repo

# install tools
sudo apt-get install build-essential sshpass git python pkg-config

# clone this repo
mkdir -p ~/raspi
cd ~/raspi
git clone https://github.com/Kukkimonsuta/rpi-buildqt.git .

# add executable permissions (this may not be required)
chmod +x scripts/0_init.sh
./scripts/0_init.sh

update values in env.sh (RPIDEV_DEVICE_* and optionally other settings)

prepare RPi (ideally use clean 'RASPBIAN JESSIE LITE' image)

# change gpu memory to 256 MB
sudo raspi-config

# uncomment deb-src line
sudo nano /etc/apt/sources.list

# install qt dependencies
sudo apt-get update
sudo apt-get build-dep qt4-x11
sudo apt-get build-dep libqt5gui5
sudo apt-get install libudev-dev libinput-dev libts-dev libxcb-xinerama0-dev libxcb-xinerama0 libsmbclient-dev libssh-dev libv4l-dev libboost1.55-all-dev libbz2-dev

# remove gstreamer
sudo apt-get purge *gstreamer*

# fix old egl
sudo rm /usr/lib/arm-linux-gnueabihf/libEGL.so.1.0.0 /usr/lib/arm-linux-gnueabihf/libGLESv2.so.2.0.0
sudo ln -s /opt/vc/lib/libEGL.so /usr/lib/arm-linux-gnueabihf/libEGL.so.1.0.0
sudo ln -s /opt/vc/lib/libGLESv2.so /usr/lib/arm-linux-gnueabihf/libGLESv2.so.2.0.0

# create qt install dir (must be at the path `QT_DEVICE_DIR`, owned by user `RPIDEV_DEVICE_USER` defined in `env.sh`)
sudo mkdir -p /usr/local/qt5.8
sudo chown pi:pi /usr/local/qt5.8

# register the lib directory in ld
echo /usr/local/qt5.8/lib | sudo tee /etc/ld.so.conf.d/qt5.8.conf

run 1_download.sh, this will download all required repositories
run 2_sync.sh, this will connect to RPi and creates a sysroot for crosscompilation
run 3.0_build_qtbase.sh, this will build and install qtbase
run 3.*_build_*.sh, this will build and install modules for qt. Feel free to add more from https://github.com/qt
run 4_build_piomxtextures.sh, this will build and install piomxtextures
run 5_sync_to_device.sh, this will copy qt5 to the device
on RPi run ldconfig
```
sudo ldconfig
```
~/piomxtextures_pocplayer /opt/vc/src/hello_pi/hello_video/test.h264

License

Kukkimonsuta/rpi-buildqt

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