Compiling to WASM

[godronus]

Having managed to get winterjs building on Linux, @Arshia001 thanks again..
I am now trying to build it to wasm. My understanding is that I should be able to follow your build.sh script to get this done.
i.e. cargo +wasix build --target wasm32-wasmer-wasi -r so long as I have the required tooling installed.

error: failed to run custom build command for `mozjs_sys v0.68.2 (https://github.com/wasmerio/mozjs.git?branch=fix-obj-file-lists#f6cbd122)`

Caused by:
  process didn't exit successfully: `/home/doco/dev/winterjs/target/release/build/mozjs_sys-e8860a2e484c9cf9/build-script-build` (exit status: 101)
  --- stdout
  cargo:outdir=/home/doco/dev/winterjs/target/wasm32-wasmer-wasi/release/build/mozjs_sys-f724c30fa6d4af20/out/build

  --- stderr
  gmake: *** No targets specified and no makefile found.  Stop.
  thread 'main' panicked at /home/doco/.cargo/git/checkouts/mozjs-e1c76167ba7c548f/f6cbd12/mozjs-sys/build.rs:251:38:
  Please provide WASI_SYSROOT for WASI targets: NotPresent
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Any help here would be appreciated... :)

[MasatoDev]

I also tried it, but I encountered the following error:

error[E0658]: use of unstable library feature 'wasi_ext'
  --> /home/myname/.cargo/git/checkouts/tokio-2eb71367495b4da5/833de72/tokio/src/fs/open_options.rs:19:5
   |
19 | use std::os::wasi::fs::OpenOptionsExt;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #71213 <https://github.com/rust-lang/rust/issues/71213> for more information
   = help: add `#![feature(wasi_ext)]` to the crate attributes to enable

I put #![feature(wasi_ext)] at the top of the file main.rs, but it didn't work.

[Arshia001]

Hey @godronus!

To fix this issue, you need a build of the wasix-libc, available here: https://github.com/wasix-org/wasix-libc

You'd need to clone that repo, run build32.sh, and feed the resulting sysroot into the WinterJS build process using WASI_SYSROOT=path/to/sysroot, which is what the error message is complaining about. Make sure you have the latest version of the WASIX toolchain as well, since WinterJS does not compile with older versions.

[Arshia001]

@MasatoDev which version of the WASIX toolchain do you have? That looks like an error message from an outdated compiler to me.

[MasatoDev]

@Arshia001

Thank you for your reply.🙇‍♂️

my versions log

ubuntu :~/winterjs$ cargo wasix --version
cargo-wasix 0.1.23

ubuntu :~/winterjs$ rustup show
Default host: x86_64-unknown-linux-gnu
rustup home:  /home/ubuntu/.rustup

installed toolchains
--------------------

stable-x86_64-unknown-linux-gnu
nightly-x86_64-unknown-linux-gnu (default)
1.76-x86_64-unknown-linux-gnu
wasix

active toolchain
----------------

nightly-x86_64-unknown-linux-gnu (default)
rustc 1.79.0-nightly (ccfcd950b 2024-04-15)

ubuntu :~/winterjs$ rustup -V
rustup 1.27.0 (bbb9276d2 2024-03-08)
info: This is the version for the rustup toolchain manager, not the rustc compiler.
info: The currently active `rustc` version is `rustc 1.79.0-nightly (ccfcd950b 2024-04-15)`

ubuntu :~/winterjs$ cargo -V
cargo 1.79.0-nightly (48eca1b16 2024-04-12)

ubuntu :~/winterjs$ rustc -V
rustc 1.79.0-nightly (ccfcd950b 2024-04-15)

I've already tried with cargo 1.76.

[Arshia001]

@MasatoDev Try running:

cargo wasix download-toolchain

and retry your build, see if the output changes? Unfortunately, it's not easy to view the WASIX toolchain version, so I don't know if you have the latest version or not. The downloader should find version v2023-11-01.1 and install it for use.

[MasatoDev]

@Arshia001
thank you!
I've already installedx86_64-unknown-linux-gnu_v2023-11-01.1 but it's not working with same error.

[marvelken]

@godronus, how did you manage to build winter.js on linux? Please your immediate reply would be deeply appreciated.