How to create my own GRT-target?

Hi,

for a project I need to write my own matlab/simulink target.

I have a workstation which I want to use as a real-time-target, running a rt-linux distro,

now I planned to add a hw target to matlab (including a toolchain for cross-compiling)

which allows to use external mode and ideally also gets deployed automatically.

Can you give me hint where to start?

I coudn't find any good examples for this, only for arm-cortex using embedded coder. Btw. my target has a x86 cpu.