integrate Wwise into a cocos Project with error "Undefined symbols for architecture x86_64"

Question

I have define the path var "WWISESDK" in the xcode project

and add the "$(WWISESDK)" to the header search paths

when I compile the code 

    AkMemSettings memSettings;

    memSettings.uMaxNumPools = 20;

    

    if ( AK::MemoryMgr::Init( &memSettings ) != AK_Success )

    {

        assert( !"Could not create the memory manager." );

        return false;

    }

it break out the err under

Undefined symbols for architecture x86_64:

  "AK::MemoryMgr::Init(AkMemSettings*)", referenced from:

      AppDelegate::applicationDidFinishLaunching() in AppDelegate.o

ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

is anything I haven't add to the project?