Re: Accessing C++ class method from ObjC++ code

FROM : Charles Hamel
DATE : Sun Nov 18 18:22:51 2007

Forgot to mention,

this is running on XCode 3.0 under 10.5.1.

Charles

On 18-Nov-07, at 12:21 PM, Charles Hamel wrote:

> 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
>
> e
>
>
>
>
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