Emscripten linker couldn't find functions, what am I doing wrong?

Question

Suppose I have function abc implemented module.cc and I build module.o and then link with flag:

-s EXPORTED_FUNCTIONS="['_abc']"

I'm getting this error:

WARNING  root: function requested to be exported, but not implemented: "_abc"

What could be the reason?

Answer 1

enclosing the functions within extern "C" {} fixed the issue.