How to call a native webassembly file in c/c++ source code?

[darkmoon233]

In the JavaScript, you can use the WebAssembly.instantiate function to load a WASM file and use the various methods provided by the WASM file. I want to know if there is such a way in C++ that I can use WASM files directly.

[binji]

You'll probably want to look at https://github.com/WebAssembly/wasm-c-api. There has been work making various wasm engines support this API (not much on wabt though).

[darkmoon233]

What I want to achieve is the cross-call between c++ and wasm. This must depend on the wasm interpreter. I think it may be some help in wabt.

[binji]

Yes, this is possible in wabt, see test-interp.cc for example. But this uses wabt's own internal interface. The wasm-c-api has (what we hope to be) a standard interface for doing this: https://github.com/WebAssembly/wasm-c-api/blob/master/include/wasm.hh#L634-L652

[sbc100]

I created #1158 to request the C-API be implemented here.

[binji]

OK, we can close this issue in favor of that one.