@Horusiath Thanks for the fast reply!

I've just checked the logs for the failing tests. Apparently, the change that needs to be done is a little more significant than the minimal oneliner I hoped for. yffi exports its staticlib and cdylib named yrs, thus if I add rlib, it has a name conflict with the actual yrs crate. There are some different ways to address it:

1. Preserving current yrs naming for yffi crate exports: make current yffi crate an intermediate crate by making it rlib only and add another crate yffi-exports (maybe a better name) that will export staticlib and cdylib preserving the current yrs naming.
2. Almost identical to option 1, but keep the current yffi as the one that exports the C libraries and creates an intermediate that is an rlib.
3. Change lib.name in yffi from yrs to yffi. As a consequence, everything that depends on these C libraries will have to change their linker flags (which is not ideal).

I'd suggest implementing option 1 or 2 as the implications of that are minimal. I'd choose option 1. Would this work for you?

@Horusiath I did a little more digging into it and found out that ywasm actually does what I described in option 3 (exports itself as ywasm and not yrs):

[lib]
crate-type = ["cdylib", "rlib"]

I look forward to your opinion on what I should do with this PR. If you find option 3 OK (considering dependent libraries needing an update), I'd say it's a better long-term choice, IMO.

Anyhow, please let me know what you think, and I'll adjust the PR according to your preference.

@dileping Sorry that it took me so long to respond.

I think that option 2 would be the best one out of three: AFAIK everyone who use static/dynamic libs for C interop, do it through yffi.

Another option would be to merge yffi into yrs as a dedicated module that can be turned on/off via eg. feature flag.

@Horusiath, thanks for getting back to me on this. It makes sense. I'll try to arrange some time next week to move this forward.

@Horusiath, I've just pushed the update here. Please check if that's okay with you. Also, if the PR is accepted, it would be great if you could publish yffi-impl on crates.io.