Problem requiring native c++ addon from electron - node.js

Question

Error when I require a Native Addon C++ from electron that works fin from Node.js
Recently I developed my first native C++ Addon for node that works fine with my node project (node version 10.15.0)
The Addon has been built using XCode, which project has been generating using CMake.
I´m having the following error when I use the same native C++ addon from my Electron app.
dyld: lazy symbol binding failed: Symbol not found: __ZN2v816FunctionTemplate3NewEPNS_7IsolateEPFvRKNS_20FunctionCallbackInfoINS_5ValueEEEENS_5LocalIS4_EENSA_INS_9SignatureEEEiNS_19ConstructorBehaviorENS_14SideEffectTypeE
Referenced from: /Users/vicentvidal/Documents/Desarrollo/DASNet2/dasaudio/build/DASNetAddon.node
Expected in: flat namespace
dyld: Symbol not found: __ZN2v816FunctionTemplate3NewEPNS_7IsolateEPFvRKNS_20FunctionCallbackInfoINS_5ValueEEEENS_5LocalIS4_EENSA_INS_9SignatureEEEiNS_19ConstructorBehaviorENS_14SideEffectTypeE
Referenced from: /Users/vicentvidal/Documents/Desarrollo/DASNet2/dasaudio/build/DASNetAddon.node
Expected in: flat namespace
As I can see the problem appears just when I call from my Electron App
const addon = require('bindings')('DASNetAddon');
which call the following C++ code
static NAN_MODULE_INIT(Init) {
v8::Local<v8::FunctionTemplate> tpl = Nan::New<v8::FunctionTemplate>(New);
tpl->SetClassName(Nan::New("StreamingWorker").ToLocalChecked());
tpl->InstanceTemplate()->SetInternalFieldCount(2);
SetPrototypeMethod(tpl, "sendToAddon", sendToAddon);
constructor().Reset(Nan::GetFunction(tpl).ToLocalChecked());
Nan::Set(target, Nan::New("StreamingWorker").ToLocalChecked(),
Nan::GetFunction(tpl).ToLocalChecked());
}
My Electron version is 3.0.10
My Nan version 2.12.1
My bindings version 1.3.1
Does anybody has any suggestion?

Answer 1

I'm not positive that this is the problem but it is possible that, because the function template is missing your C++ class name, the namespace is coming from somewhere else. Here's one of my Nan Init() functions. The line following the // Prepare constructor template qualifies the New argument with a class namespace.
void Metadata::Init(v8::Local<v8::Object> exports) {
Nan::HandleScope scope;
// Prepare constructor template
v8::Local<v8::FunctionTemplate> ctor = Nan::New<v8::FunctionTemplate>(Metadata::New);
constructor.Reset(ctor);
ctor->InstanceTemplate()->SetInternalFieldCount(2);
ctor->SetClassName(Nan::New("Metadata").ToLocalChecked());
// Prototype
Nan::SetPrototypeMethod(ctor, "copy", Metadata::copy);
Nan::Set(exports, Nan::New("Metadata").ToLocalChecked(), ctor->GetFunction());
}
I haven't tried running/loading in an Electron environment, nor on a Mac, so I can only say this works fine on Linux. But because your error message refers to "FunctionTemplate3New" it's a guess.