How to create a sysroot for cross compiling openframeworks for Raspberry Pi from Linux

README.md

On a Raspberry Pi with Raspbian system, first cleanup apt cache with :

sudo  aptitude clean

Then download package without installing them :

sudo aptitude --download-only reinstall \
xorg-dev                  \
libgtk-3-dev              \
libboost-filesystem-dev   \
libboost-system-dev       \
libudev-dev               \
libcairo2-dev             \
libusb-1.0-0-dev          \
libssl-dev                \
libfreetype6-dev          \
libfontconfig1-dev        \
libglu1-mesa-dev          \
libmpg123-dev             \
libopenal-dev             \
libassimp-dev             \
libopencv-dev             \
libasound2-dev            \
libsndfile1-dev           \
gstreamer1.0-x            \
gstreamer1.0-alsa         \
gstreamer1.0-libav        \
gstreamer1.0-pulseaudio   \
gstreamer1.0-plugins-base \
gstreamer1.0-plugins-good \
gstreamer1.0-plugins-bad  \
gstreamer1.0-plugins-ugly \
libgstreamer1.0-dev       \
libgstreamer-plugins-base1.0-dev \
libcurl4-openssl-dev \
liburiparser-dev \
libpugixml-dev \
zlibg1-dev \
libpng16-16

extract all deb into a sysroot folder and compress the folder

mkdir ~/sysroot
cd ~/sysroot
for deb in /var/cache/apt/archives/*.deb; do dpkg-deb -xv $deb .; done
cd ..
tar -cazf sysroot.tar.gz sysroot

then transfert the tar to your dev machine running linux and unpack it :

mkdir ~/ofnode
scp pi@raspberrypi.local:~/sysroot.tar.gz .
tar -xf sysroot.tar.gz