WASM Compilation fails with exceptions - Few libraries needs to be upgraded

[sendilkumarn]

error[E0412]: cannot find type `c_int` in this scope
 --> /Users/sendilkumar/.cargo/registry/src/github.com-1ecc6299db9ec823/miniz-sys-0.1.10/lib.rs:7:24
  |
7 | pub const MZ_NO_FLUSH: c_int = 0;
  |                        ^^^^^ not found in this scope
help: possible candidate is found in another module, you can import it into scope
  |
5 | use std::os::raw::c_int;

most of the errors are from std::os::raw::c_* in libraries like miniz-sys memchr etc., which are from the other libraries.

cc: @Yoric

[Yoric]

Is this something we can do ourselves by just bumping up dependencies or should we contribute patches to other crates?

[sendilkumarn]

We can try bumping things, I think most of the crates were updated to handle wasm

[Yoric]

PR welcome :)

[sendilkumarn]

A bulk of the errors were from flate2 lib which is not wasm-compatible yet. Let us wait till it gets ready 👍

Also, we have to move to wbg-rand instead of rand will that be okay? (since rand crate is not wasm compatible)

[Yoric]

A bulk of the errors were from flate2 lib which is not wasm-compatible yet. Let us wait till it gets ready 👍

Is that because of the C code?

We could either switch to libflate or use the experimental option in flate2 to avoid C code. Would you be willing to try these options?

Also, we have to move to wbg-rand instead of rand will that be okay? (since rand crate is not wasm compatible)

Sounds good. We're using randomness only for testing purposes, so it shouldn't affect our features.

[sendilkumarn]

@Yoric I am waiting for this to be released rust-random/rand#520