WD Cloud runs Debian Linux on ARM. When you build applications for other architectures, you need to use cross-building. I have successfully built a package on Ubuntu 14 by following this post with a few notes.

If you see an error message like: {% codeblock lang

Then, copy /etc/resolv.conf into build/etc, e.g., {% codeblock lang

Summary of Cross-Building with Wheezy for WD Cloud Firmware Version 4 or Above

{% codeblock lang

required for cross-building

apt-get install qemu-user-static apt-get install binfmt-support

folder for building

mkdir wdmc-build cd wdmc-build

download location can be found in http://support.wdc.com/product/download.asp?groupid=904&lang=en

wget http://download.wdc.com/gpl/gpl-source-wd_my_cloud-04.01.03-421.zip

unzip gpl-source-wd_my_cloud-04.01.03-421.zip packages/build_tools/debian/* mkdir 64k-wheezy cp -R packages/build_tools/debian/* ./64k-wheezy echo ’#!/bin/bash’ > 64k-wheezy/build.sh echo ’./build-armhf-package.sh —pagesize=64k $1 wheezy’ >> 64k-wheezy/build.sh chmod a+x 64k-wheezy/build.sh

cd 64k-wheezy

the setup script will prompt for root password during chroot

./setup.sh bootstrap/wheezy-bootstrap_1.24.14_armhf.tar.gz build

sudo mv build/usr/bin/qemu-arm-static build/usr/bin/qemu-arm-static_orig sudo cp /usr/bin/qemu-arm-static build/usr/bin/qemu-arm-static

override build/etc/apt/sources.list

sudo echo “deb http://security.debian.org/ wheezy/updates main contrib non-free” > build/etc/apt/sources.list sudo echo “deb-src http://security.debian.org/ wheezy/updates main contrib non-free” >> build/etc/apt/sources.list sudo echo “deb http://ftp.debian.org/debian wheezy-updates main contrib non-free” >> build/etc/apt/sources.list sudo echo “deb-src http://ftp.debian.org/debian wheezy-updates main contrib non-free” >> build/etc/apt/sources.list sudo echo “deb http://ftp.debian.org/debian wheezy main contrib non-free” >> build/etc/apt/sources.list sudo echo “deb-src http://ftp.debian.org/debian wheezy main contrib non-free” >> build/etc/apt/sources.list

optional until you need to use backports packages

sudo echo “deb http://ftp.debian.org/debian wheezy-backports main contrib non-free” >> build/etc/apt/sources.list sudo echo “deb http://ftp.debian.org/debian wheezy-backports main contrib non-free” >> build/etc/apt/sources.list

sudo cp /etc/resolv.conf build/etc {% endcodeblock %}

Then you can build by running build.sh with the package name, e.g., {% codeblock lang

It will download the source package from the repository, cross-compile it, and build a deb file. The process could take over 10 minutes. Once it is successful, you can scp the .deb file to your router and install it with dpkg -i.

Building Node.js Manually

It is a little tricky to build Node.js because the source is not in the repository. I have tried to use a binary from http://nodejs.org/dist/v0.12.0/node-v0.12.0-linux-x86.tar.gz, but it failed with: cannot execute binary file You can follow the scripts to build it manually: {% codeblock lang

setup utils

./setup.sh bootstrap/wheezy-bootstrap_1.24.14_armhf.tar.gz build sudo mkdir -p build/root/binutils sudo tar vfx binutils/binutils-armhf-64k.tar.gz -C build/root/binutils sudo chroot build /bin/bash cd /root/binutils dpkg -i binutils_.deb dpkg -i binutils-multiarch_.deb export DEBIAN_FRONTEND=noninteractive export DEBCONF_NONINTERACTIVE_SEEN=true export LC_ALL=C export LANGUAGE=C export LANG=C export DEB_CFLAGS_APPEND=’-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE’ export DEB_BUILD_OPTIONS=nocheck cd /root

now the build environment is ready

wget http://nodejs.org/dist/v0.12.0/node-v0.12.0.tar.gz tar vfxz node-v0.12.0.tar.gz cd node-v0.12.0 ./configure make

go back to original environment

exit {% endcodeblock %} The binary is ready in build/root/node-v0.12.0/node for you to upload to the WD Cloud. You can upload to /usr/local/bin in your WD Cloud.

You also need to download npm and other components from http://nodejs.org/dist/v0.12.0/node-v0.12.0-linux-x86.tar.gz. Extract the files and put them in either /usr/local or /usr. {% codeblock lang

Package List

Below is a list of packages I have successfully built:

• htop
• joe
• unrar
• transmission
  • libcurl3-gnutls
  • libminiupnpc5
  • libnatpmp1
  • transmission-common
  • transmission-daemon
• Node.js prerequisites
  • libc-ares2
  • libv8
• python3-pip
  • libcurl3-gnutls
  • python2.6
  • python3
  • python3-pkg-resources
  • python3-setuptools
  • python-pkg-resources
  • python-setuptools
• liberror-perl (required for git)
• git
• rrdtool (required for cacti)
• virtual-mysql-client (required for cacti)
• php5-mysql (required for cacti)
• dbconfig-common (required for cacti)
• libphp-adodb (required for cacti)
• snmp (required for cacti)
• php5-snmp (required for cacti)
• cacti

Packages are uploaded to https://app.box.com/wdcloud.

Script to build: {% gist 1629e9a9bf266fb4abfc %}