pytorch 1.4.0 for armhf

## I am starting on ubuntu 19.10 ##

sudo mkdir stretch-armhf
sudo debootstrap --arch=armhf stretch stretch-armhf/ http://deb.debian.org/debain

sudo chroot stretch-armhf
mount -t proc proc /proc

## I would try to install vim here ##

apt-get install vim

## find out num of processors ##

nproc

## disable daemons ##

## /usr/sbin/policy-rc.d ##

vim /usr/sbin/policy-rc.d

## add the following to the file and then exit ##

exit 101

## make sure the file has the right permissions ##

sudo chmod 755 /usr/sbin/policy-rc.d

## install some programs here ##

apt-get install libblas3 libatlas-base-dev

apt-get install python3-dev python3-yaml python3-pillow python3-setuptools python3-numpy python3-cffi python3-wheel

## build python 3.7.3 ##

apt-get install build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev wget

wget https://www.python.org/ftp/python/3.7.3/Python-3.7.3.tar.xz

tar xvz Python-3.7.3.tar.xz

cd Python-3.7.3

./configure --enable-optimizations

make

make altinstall

cd ..

## make git ##

wget https://github.com/git/git/archive/v2.25.0.tar.gz

apt-get install dh-autoreconf libcurl4-gnutls-dev libexpat1-dev gettext libz-dev libssl-dev

tar xvz v2.25.0.tar.gz

cd v2.25.0

make configure

./configure --prefix=/usr

make all doc info

make install install-doc install-html install-info

cd ..

alias python=python3.7
alias python3=python3.7

python3.7 -m pip install wheel pyyaml setuptools

git clone https://github.com/pytorch/pytorch --recursive 

cd pytorch

git checkout v1.4.0 

git submodule update --init --recursive

export NO_CUDA=1
export NO_DISTRIBUTED=1
export NO_MKLDNN=1 
export BUILD_TEST=0 # for faster builds
export MAX_JOBS=8 # see nproc above

python3.7 setup.py bdist_wheel

## wait 5 to 10 hours ##

## this is where you find the wheel... ##

ls dist/