You can either compile Nim to Objective-C with `nim objc yourfile.nim`
Or compile Nim to C as a shared library.
Tag the exported proc with `{.exportc.}` or `{.exportc: "my_desired_name".}` to
ask Nim not to mangle them.
Then you can compile to a shared library and associated header with: `nim c
--noMain --noLinking --header:my_header.h my_file.nim`
Or combine both (?): `nim objc --noMain --noLinking --header:my_header.h
my_file.nim`
When calling Nim code, you will need to initialize Nim runtime once by calling
NimMain().
Then you can follow any tutorial to call C from Objective-C.
The full details of Nim interop are written here:
[https://nim-lang.org/docs/backends.html#interfacing-backend-code-calling-nim](https://nim-lang.org/docs/backends.html#interfacing-backend-code-calling-nim).
Note that the Objective-C backend is less tested compared to C and C++ so I
recommend you go the C way but if you get Objective-C to work that would be
very nice.
