I was surprised to see sprintf() in the core code and it got me wondering . .
For purity sake why wouldn’t all of the library functions be brought out into a port-specific file so they can be identified and assigned an implementation. I know memcpy, memset and sprintf are all common implementations, but they ‘may’ not be thread-safe in a particular library.
Incidently, I’m working on the eZ80 (Zilog) port found in the in the community section. I fixed one problem with it and it seems stable so far. After I add some device drivers I’ll contact you about sharing it.