"This type must be class definition for: ..." error when enabling EMBIND_AOT

[martijnthe]

Hi!
I'm trying to enable EMBIND_AOT & DYNAMIC_EXECUTION=0.
Without those flags, the project builds fine, but with them I get this confusing error:

Error: This type must be class definition for: getAddressByteSize
    at /tmp/emscripten_temp_e0rzgss1/tsgen.js:4450:19
    at onComplete (/tmp/emscripten_temp_e0rzgss1/tsgen.js:3933:32)
    at /tmp/emscripten_temp_e0rzgss1/tsgen.js:3957:15
    at /tmp/emscripten_temp_e0rzgss1/tsgen.js:4014:35
    at Array.forEach (<anonymous>)
    at sharedRegisterType (/tmp/emscripten_temp_e0rzgss1/tsgen.js:4014:19)
    at registerType (/tmp/emscripten_temp_e0rzgss1/tsgen.js:4018:14)
    at onComplete (/tmp/emscripten_temp_e0rzgss1/tsgen.js:3938:11)
    at /tmp/emscripten_temp_e0rzgss1/tsgen.js:3957:15
    at /tmp/emscripten_temp_e0rzgss1/tsgen.js:4014:35

Does anyone know what this means or what I could be doing wrong?

In my .cpp code I have something like this:

class_<MyClass>("MyClass")
    ... more .function(...) calls
    .function("getAddressByteSize", &GetAddressByteSize)   // <= pointer to regular function, taking a const MyClass&
    ... more .function(...) calls

[sbc100]

@brendandahl

[brendandahl]

Can you provide more of your bindings or ideally a minimal reproducer? I tried this below and it seems to work fine:

#include <stdio.h>
#include <emscripten.h>
#include <emscripten/bind.h>

using namespace emscripten;

struct Foo {
  int i = 42;
};

int foo(const Foo& foo) {
  return foo.i;
}

int main() {
  EM_ASM(
    let foo = new Module.Foo();
    console.log(foo.foo());
  );
  printf("done\n");
}

EMSCRIPTEN_BINDINGS(xxx) {
  class_<Foo>("Foo")
    .constructor()
    .function("foo", &foo);
}