Figured out a way to do this, posting to potentially save someone else a couple days. Solution was to pretty much ignore CMake on its own and present the library as an IDF component local to the project.

- Make a "components" directory in your project root.
- Put the library source tree in the ...

Howdy,
I'm trying to use libfixmath (a plain Makefile based library) in a simple project derived from the blink example, but not having much success in finding the correct incantations for CMakeLists.txt.

I have the libfixmath source tree in my project root directory (no idea if this is correct ...