The sample apps 3, 4 and 5 provide examples for building C and C++ based applications for deployment as VMs within the GOS.
The 1.0 IOx SDK is available here: IOx SDK version 1.0.0
I am given to understand that there are options for C++ support on the IR910.
How does that compare to what is possibly going to be available on the IR829 please?
For the difference between IR910 and IR829/80, please check the post: Cisco IOx Nodes (ISR819/CGR1120/1240/IR829/809/IR910) Hardware and Software Specification