We’re still working to find the cross compiler. Please use the System Studio which can be downloaded here https://software.intel.com/en-us/node/660275 . When we find some information on the cross compiler we’ll post it here but it may not be available yet.
Thank you for your patience. We looked for the cross compiler and you’re right, it’s a little hard to find but we’ll guide you through the steps.
First, go to the Joule downloads site here https://software.intel.com/en-us/iot/hardware/joule/downloads
There is a link for "Download the operating system (OS) image" which points to https://download.ostroproject.org/builds/ostro-os-xt/latest/images/intel-corei7-64
At this point you need to go up two parent directories, you will find a 'sdk" folder with the cross compiler, at https://download.ostroproject.org/builds/ostro-os-xt/latest/sdk/intel-corei7-64/ostroxt-x86_64-corei7-64-toolchain-1.0+snapshot.sh
This allows you to build code using the provided cross compiler on your Ubuntu 16.04 desktop/laptop/workstation machine.
Let us know if this is what you were looking for.