That looks interesting. Unfortunately it looks like it hasn't been updated in a while? Is that because it's complete or a lack of interest?

For example, the approach mentioned at the bottom of the README of integrating via nlvm (https://github.com/arnetheduck/nlvm) sounded great but appears to be unpursued.

that looks interesting, thanks! Did you try it if it delivers on promises? There was not any new commit since 2020 so not sure if the project is stale by now.

Things might changed but last time I checked you could easily call C function but you had to kind of export each single C function, structs etc. You couldn't just import single header file and be ready to call any function in the library. There is some pending project [0] futhark but not sure how mature it is and that still only for C libraries (instead of C++ or Rust) but maybe easy adopt for Zig - would be great nonetheless.

[0] https://github.com/PMunch/futhark