Accessing C++ class method from ObjC++ code

FROM : Charles Hamel
DATE : Sun Nov 18 18:21:22 2007

Hi

I have a C++ class definition in a file that looks like this:

class Vision {

   public: void analyze(NSMutableArray* a);

};

The implementation of this class in located in a seperate file (.mm 
extension) and compiled as Obj-C++ code.

I have an AppController ObjC class that has as an instance variable of 
pointer to a Vision object. The AppController.mm file is also compiled 
as Obj-C++. AppController.mm imports AppController.h which in turns 
imports Vision.h.

In one of AppController's method, I call this : vision-
>analyze(newArray);


Everything compiles fine, except linker says :

  "Vision::analyze(NSMutableArray*)", referenced from:
      -[AppController testAction:] in AppController.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

I have tried to specify the symbol visibility using 
__attribute__((visibility("default"))) but that failed as well.

What am I missing ?

Thank you

Charles

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