CODEWITHSUNDEEP
rustwebassemblyrust-cargo
smolus
smolus

Reputation: 125

Rust stdweb fails to compile

I wanted to get started with the stdweb library but for some reason my code doesn't compile. Here's the code:

#[macro_use]
extern crate stdweb;

fn main() {
    stdweb::initialize();

    let message = "Hello, 世界!";
    js! {
        alert( @{message} );
    }

    stdweb::event_loop();
}

And here's the error I get when i run cargo web start --target=wasm32-unknown-unknown:

error: linking with `rust-lld` failed: exit code: 1
  |
  = note: "rust-lld" "rust-lld" "-flavor" "wasm" "--no-threads" "-z" "stack-size=1048576" "--stack-first" "--allow-undefined" "--fatal-warnings" "--no-demangle" "--export-dynamic" "--no-entry" "-L" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/rust_snake.16ntzdg2n8bx81q6.rcgu.o" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/rust_snake.2xfx8uklq7n12q67.rcgu.o" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/rust_snake.48klqndjiid3k9rj.rcgu.o" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/rust_snake.48le17nhrmqft97k.rcgu.o" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/rust_snake.4b580liojrglk551.rcgu.o" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/rust_snake.4rrrlrglrmdphj5c.rcgu.o" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/rust_snake.4vuc8rinrzvzrs2v.rcgu.o" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/rust_snake.50srrlytlsid8m35.rcgu.o" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/rust_snake.5fgjih7crwhwn4xr.rcgu.o" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/rust_snake.5fkqw2idrlv7jos5.rcgu.o" "-o" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/rust_snake.wasm" "--export" "main" "--export" "__web_malloc" "--export" "__web_free" "--export=__heap_base" "--export=__data_end" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/rust_snake.2l9dobmrlqco0sju.rcgu.o" "--gc-sections" "-O0" "-L" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps" "-L" "/home/kuba/Projects/rust-snake/target/debug/deps" "-L" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/libstdweb-ef476852d27a12c5.rlib" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/libdiscard-a83cebb0a142eb8f.rlib" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/libstdweb_internal_runtime-0bce6e61d1817cf7.rlib" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/libserde_json-1c98a67e94d08af3.rlib" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/libryu-322b81c9b49f7e9f.rlib" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/libitoa-a7c2d7644820b152.rlib" "/home/kuba/Projects/rust-snake/target/wasm32-unknown-unknown/debug/deps/libserde-c2f4e30465155451.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/libstd-9c867bc4c16ee4c2.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/libpanic_abort-ed0cd729c2f3d142.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/libdlmalloc-030f419e714a0cc6.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/libhashbrown-a12a1f881dba75e1.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/librustc_std_workspace_alloc-35aa06e58878157c.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/libbacktrace-6636ad5f40fe0c6e.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/librustc_demangle-3c1019358081106e.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/libunwind-b93526bae6789131.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/libcfg_if-12a659b7ffc8c645.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/liblibc-62025a1d48e0630e.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/liballoc-80234d57a1442351.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/librustc_std_workspace_core-d429e78abfaecaef.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/libcore-c485e95495d6739c.rlib" "/home/kuba/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib/libcompiler_builtins-53d1b7f6a2bd6c6f.rlib" "-fuse-ld=gold"
  = note: rust-lld: error: unknown argument: -fuse-ld=gold


error: aborting due to previous error
error: could not compile `rust-snake`.

Some additional info I think might be useful:

cargo version: cargo 1.41.0-nightly (626f0f40e 2019-12-03)
insides of ~/.cargo/config: 

[target.arm-unknown-linux-gnueabihf]
linker = "arm-linux-gnueabihf-gcc-7"

Any help would be appreciated :)

Edit: I'm using "elementary os" (basicly ubuntu with cooler ui). And trying to build on stable gives me exactly the same error.

Edit2: rustup show returns

rustup home:  /home/kuba/.rustup

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

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

installed targets for active toolchain
--------------------------------------

arm-unknown-linux-gnueabihf
armv7-unknown-linux-gnueabihf
wasm32-unknown-unknown
x86_64-unknown-linux-gnu

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

stable-x86_64-unknown-linux-gnu (default)
rustc 1.40.0 (73528e339 2019-12-16)

Edit3: cargo-web --version returns cargo-web 0.6.26

Upvotes: 2

Views: 1372

Answers (1)

wasmup
wasmup

Reputation: 16273

Your linker or compiler settings are not set correctly, or changed somehow.

error: unknown argument: -fuse-ld=gold

Remove the gold linker flag: -fuse-ld=gold from your RUSTFLAGS, LD environmental variables or the compiler options.

Use verbose flag (-v or --verbose) to see verbose output:

cargo web build -v --target=wasm32-unknown-unknown

WebAssembly is fast, safe, portable, and part of the open Web platform.
So the WebAssembly is platform independent (You don't need to compile it to ARM, and it is virtual machine based so you need a host to run WebAssembly, e.g. inside a web browser JavaScript VM for WebAssembly. Also there is WASI: WebAssembly System Interface).

Since it is portable:
You may build it using your working compiler on any machine and then just copy .wasm file(s) to the target web server machine.

To start a web hello world sample from scratch: 

rustup target add wasm32-unknown-unknown

# https://github.com/koute/stdweb
cargo search cargo-web
# cargo-web = "0.6.26"          # A Cargo subcommand for the client-side Web
# cargo install cargo-web --version 0.6.26
cargo install cargo-web
file ~/.cargo/bin/cargo-web
cargo-web --version
# cargo-web 0.6.26

# create new project e.g. "123stdweb-rs-js"
cargo new 123stdweb-rs-js
cd 123stdweb-rs-js

cargo search stdweb

Add to Cargo.toml file end after [dependencies]: 

stdweb = "0.4.20"  # A standard library for the client-side Web

main.rs file:

use stdweb;
use stdweb::js;

fn main() {
    stdweb::initialize();
    let message = "Hello from stdweb.";
    let result = js! {
        alert( @{message} );
        return 2 + 2 * 2;
    };
    println!("2 + 2 * 2 = {:?}", result);
    stdweb::event_loop();
}

Build and run web server to serve target/wasm32-unknown-unknown/debug/stdweb-rs-js.js: 

# Compile to WebAssembly using Rust's native WebAssembly backend:
cargo web start --target=wasm32-unknown-unknown

Open your web browser http://localhost:8000: 

firefox http://localhost:8000

Done.

You may release build: 

cargo web build --release --target=wasm32-unknown-unknown
mkdir static
cp target/wasm32-unknown-unknown/release/stdweb-rs-js.js ./static/
cp target/wasm32-unknown-unknown/release/stdweb-rs-js.wasm ./static/

Now you may serve stdweb-rs-js.js and stdweb-rs-js.wasm files using your favorite static web server e.g. python3 -m http.server 8080 using simple ./static/index.html file:

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
  </head>
  <body>
    Right click <b>Inspect</b> then click <b>Console</b> tab
    <hr />

    <script src="stdweb-rs-js.js"></script>
  </body>
</html>

That's all.

I hope this helps.

Upvotes: 1

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