Error While creating hello world with cout in c++

[rggaur789]

Hi,

I have tried the below simple c++ code

#include <iostream>

int main() {
    std::cout << "Hello World!\n";
    return 0;
}

with command emcc main.cpp -o file.wasm -s STANDALONE_WASM

and wasmtime file.wasm

but I am getting

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

Caused by:
    0: failed to instantiate "file.wasm"
    1: unknown import: `env::_tzset_js` has not been defined

I am using emscripten and wasmtime latest versions. Can you please help what I am doing wrong here?

[kripken]

I believe this was fixed in #22316. That is not yet in a release, but you can use a tip of tree build, emsdk install tot.

[rggaur789]

@kripken , also File handling will also work fine if I will use tip of tree build ?

[kripken]

@rggaur789 File handling support in standalone mode is pretty limited atm. There is some work on that here, but it has not landed: https://github.com/emscripten-core/emscripten/pull/18285