Using rug in Rust with wasm-bindgen

问题

I'd like to use the rug crate with wasm-bindgen to allow me to use arbitrary-precision arithmetic in a web browser. Whenever I try to compile, though, it fails to build the library, saying something along the lines of

unresolved imports libc::c_char, libc::c_int, libc::c_long.

Is there a workaround for this? If Emscripten is involved that's fine, but I'd like to be able to mostly write Rust code.

回答1:

rug depends on libc

I found https://github.com/rust-lang/libc/issues/858#issuecomment-573331279

By definition, wasm32-unknown-unknown has no libc. If you want to use emscripten or wasi you can use wasm32-unknown-emscripten or wasm32-wasi, both of which are already supported in the libc crate.

https://users.rust-lang.org/t/wasm-unknown-vs-emscripten/22997/5 looks like a good explanation about the difference.

来源：https://stackoverflow.com/questions/62110162/using-rug-in-rust-with-wasm-bindgen