How to identify a link between wasm file and its source code?

Hi,

I am trying to identify a link between a wasm file and its source.

Actually, I compile a c/c++ program using emcmake cmake, then emmake make of emscripten.

It generates wasm files. But I want to know, which c/c++ file generated the wasm file? How can I identify this link?

Thanks in advance.