You need to export those by adding linker arguments: https://emscripten.org/docs/porting/connecting_cpp_and_javascript/Interacting-with-code.html#interacting-with-code-ccall-cwrap

Hi @SGaist , One thing that made me skeptical about the info on the introduction page, was the affirmative that webassembly doesn't support threads, which is not an absolute true, in fact is relatively simple to enable thread support with the correct emscripten version. But everything so far is telling me that is not possible, or at least it will be very hard to compile wasm as shared.

@Ahmed-Yarub-Hani-Al-Nuaimi Oh ok I see, thanks for your time !

@alizadeh91 See https://stackoverflow.com/questions/56886410/access-local-user-file-on-qt-for-web-assembly

@alizadeh91 Basically, your question is the same as "How do I make a standalone executable that is compiled to native code that plays my animation." You need to either write or use a compiler and toolchain that builds software for the target. In this case, your target is webassembly rather than something like Win64 or OS-X. It's unclear if that's really what you want to do, but there's no real support for emitting webassembly from Qt, any more than there is for emitting Windows .exe's. Qt depends on the system's native compiler and toolchain to make compiled executables. It isn't a compiler in itself. If you are able to export your animations to a (de facto) standard format like Lottie : https://airbnb.io/lottie/ you can find off the shelf player tools which may be useful to you.

Oops! It worked in my last attempt, although it look a long time. So, my problem was Emscripten's version after all. Here is the version that worked: emscripten-1.37.1 Note: I've used emsdk to install Emscripten and I had to install a matching LLVM/CLang version: clang-e1.37.1-64bit