How to load a dynamic library that needs another library?

Hi,

I am new to Node FFI and more generally to native addons. I need to wrap a dynamic library on MacOS (let’s call it libA), which needs to load another dynamic library (libB). This is my project structure:

• build/
  • libA.dylib
  • libB.dylib
• lib/
  • a.js

lib/a.js is where I create my wrapper:

// [...]
const addon = ffi.Library("./build/libA.dylib", {
	// [...]
});
// [...]

Now when I want to test this, from the project root folder: node ./lib/a.js. FFI seems to be able to load libA, but then libB is not loaded:

Error: Dynamic Linking Error: dlopen(./build/libA.dylib, 2): Library not loaded: @rpath/libB.dylib
  Referenced from: /Users/jroy/Workspace/test-node-ffi/build/libA.dylib
  Reason: image not found
    at new DynamicLibrary (/Users/jroy/Workspace/test-node-ffi/node_modules/ffi/lib/dynamic_library.js:74:11)
    at Object.Library (/Users/jroy/Workspace/test-node-ffi/node_modules/ffi/lib/library.js:45:12)
    at Object.<anonymous> (/Users/jroy/Workspace/test-node-ffi/lib/a.js:31:19)
    at Module._compile (internal/modules/cjs/loader.js:721:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:732:10)
    at Module.load (internal/modules/cjs/loader.js:620:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:560:12)
    at Function.Module._load (internal/modules/cjs/loader.js:552:3)
    at Module.require (internal/modules/cjs/loader.js:657:17)
    at require (internal/modules/cjs/helpers.js:22:18)

How am I supposed to handle this? Do I need to copy libB.dylib somewhere else (I already tried to copy it in lib and in the project root folder without success)?

[manuxdjent]

In my case the solution was fixing the DLL path using ‘path.join’.

const dllFunctions = ffi.Library(path.join(static__, myDll.dll), { // some code });

[manuxdjent]

I have the same problem. I tried to put the dependencies in my System32 folder and it doesn’t work every time.