How to Resolve Errors When Compiling Golang to Wasm with Wasmtime and Wasm3?-Golang-php.cn

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How to Resolve Errors When Compiling Golang to Wasm with Wasmtime and Wasm3?

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Oct 23, 2024 pm 04:47 PM

How to Resolve Errors When Compiling Golang to Wasm with Wasmtime and Wasm3?

Errors in Golang to Wasm Compilation with Wasmtime and Wasm3

Compiling Golang code to WebAssembly (Wasm) using GOOS=js GOARCH=wasm go build -o main.wasm may lead to errors when executing with Wasmtime or Wasm3. Let's investigate the errors and explore possible solutions.

Wasmtime Error:

Error: failed to run main module `main.wasm`

Caused by:
    0: failed to instantiate "main.wasm"
    1: unknown import: `go::debug` has not been defined

The error indicates that Wasmtime encounters an unresolved import (go::debug) during runtime, suggesting that the compiled Wasm module lacks a definition for this import.

Wasm3 Error:

Error: function lookup failed ('_start')

Wasm3 encounters an error during function lookup, suggesting that the Wasm module does not define an entry point function (_start).

Solution:

According to the provided response, the original approach has limitations when compiling Golang to Wasm outside the browser. The following options are suggested to resolve the errors:

Use Node.js with the wasm_exec.js shim:
```
node wasm_exec.js main.wasm
```
This allows for execution outside the browser environment.
Compile with TinyGo and Wasi support:
```
tinygo build -target=wasi -o main.wasm main.go
```
TinyGo provides support for compilation to Wasm with Wasi, which should work with Wasmtime.
Experimental Golang compilation with Wasm support:
```
GOOS=wasip1 GOARCH=wasm gotip build -o main.wasm
```
This requires compiling Go from sources and enabling the latest experimental features, but should allow for direct execution with Wasmtime.

For these specific errors, it is suggested to try option 1 (using Node.js with wasm_exec.js), or option 2 (compiling with TinyGo and Wasi support) if running standalone with Wasmtime is desired.

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