Troubleshooting

Compiling for emscripten-wasm32 is a complex task. This section provides some tips and tricks to help you troubleshoot common issues.

Buildtime errors

This section is still empty, feel free to contribute by opening a pull request.

Runtime errors

PyLong_FromLongLong: imported function does not match the expected type

When facing an error at runtime while importing a shared-library / python-package like the following:

 LinkError: WebAssembly.instantiate():
    function="PyLong_FromLongLong":
    imported function does not match the expected type

or an error message containing *LongLong or similar wording, it is likely that the linker flag -s WASM_BIGINT is missing.