How hard would module initalizations / ctors be?

[daboross]

I've recently been interested in using some libraries, mainly typetag, which depend on rust-ctor to function.

rust-ctor uses link sections on Windows, Mac and Linux to allow functions to run main. Any crate can add these functions, and then they'll all be run without needing for central configuration.

If you could estimate, would it be possible to add support for this to stdweb?

Asking here rather than in rust-ctor since I'm 95% sure this needs support from cargo-web. If there's an existing way to write static constructors in wasm32-unknown-unknown, though, my apologies. Still, any solution would be good.

[koute]

I don't think wasm32-unknown-unknown can do this out-of-box. It would be possible to add it relatively easily, although, yes, it would require support from cargo-web.

It would be a good idea to ask the wasm-bindgen folks about this though, as I'd prefer to pick a common approach which will work across the whole ecosystem both with cargo-web and with wasm-bindgen.

[daboross]

Alright, that makes sense. Glad I didn't miss something obvious in the rustc documentation!

I've opened https://github.com/rustwasm/wasm-bindgen/issues/1216 to continue the discussion and include wasm-bindgen.