@whitequark You mean there isn't a hello world? If so, that makes me feel good that I didn't just fail to find it. :-)
I probably don't have the terminology right. What does it mean to "have gdb" for my "DSP target"?
I presume the steps look something like write some code on the PC that translates between what gdb needs to work and what my serial-cli can provide. (?!).
This is a custom FPGA, I presume there is also some sort of definition for my architecture/assembly/machine code needed?