Hiroaki Yutani

Oh, maybe we can just set `LIBRSYS_R_VERSION` envvar? https://github.com/extendr/libR-sys#configuration

I see. Thanks for investigation. Then, maybe we should go with the bindgey way as we discussed above?

In my opinion, it would be better because we don't need to embed the logic just for docs.rs in the source code.

I'd vote for the option 4 (Remove or regenerate bindings for R 3.6 on libR-sys) above, but I don't have strong opinion here. I don't think any of the options...

> I'm not sure how to do this I think you can just add `bindgen` feature to `[package.metadata.docs.rs]`.

Oh, sorry. I completely forgot I made the change. Then, it's just that the version is not published yet.

Yeah, this should be solved when we publish a new release. If you mean you want to publish it now, I have no idea whether we even have a criteria...

No, I didn't.

I think there are roughly three options: 1. Move all tests and doc tests to extendr-api's side 2. Don't test extendr-macros on Windows 3. Use the GNU toolchain (i.e. `+stable-gnu`)...