Import background information about FPGA toolchains from SymbiFlow docs

[mithro]

I think we can steal a bunch of documentation from the SymbiFlow docs. There is a section called FPGA Design Flow that could fit into the Workshop Background page.

I wonder if there is a way we can just "share" the documentation in some way?

[mithro]

This is actually one of the reasons I converted to using Sphinx for the workshop.

[mithro]

@mgielda

[umarcor]

You can use intersphinx for cross-referencing multiple Sphinx sites. For example:

• https://github.com/VUnit/vunit/blob/master/docs/conf.py#L79-L81
• https://github.com/ghdl/ghdl/blob/master/doc/conf.py#L152-L156
• https://github.com/ghdl/ghdl-cosim/blob/master/doc/conf.py#L134-L139