I briefly looked a this and there's already cargo-c configuration, which is good, but it's currently namespaced differently, so it won't get automatically detected by C programs as `libbz2`:

https://github.com/trifectatechfoundation/libbzip2-rs/blob/8...

I'm not familiar enough with the symbols of bzip2 to say anything about ABI compatibility.

I have a toy project to explore things like that, but it's difficult to set aside the amount of time needed to maintain an implementation of the GNU operating system. I would welcome pull requests though:

https://github.com/kpcyrd/platypos