CODEWITHSUNDEEP
iosxcodemacosopencl
user2756695
user2756695

Reputation: 696

Use OpenCL at Mac with xCode

I have done some CUDA programming at Windows and now I want to learn OpenCL. I have Macbook retina which contains Intel Iris graphics card. I already have xCode. I tried to find a lot at internet about how can I check if OpenCL is already installed at my Mac but I could not understand a proper way. I just read that Macbook will automatically get OpenCL installed with xCode.

I wrote few lines which are related to OpenCL but it throws error:

Undefined symbols for architecture x86_64:
  "_clGetPlatformIDs", referenced from:
      _main in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I am completely new to OpenCL and unable to understand how things work with OpenCL.

My Code:

#ifdef __APPLE__
#include "OpenCL/opencl.h"
#else
#include "CL/cl.h"
#endif

#include <iostream>
using namespace std;

int main()
{
    cl_uint platformIdCount = 0;
    clGetPlatformIDs (0, nullptr, &platformIdCount);

    cout<<"Test openCL";
    return 0;
}

PS: Inclusion of header files does not throw any error. The error occurs due to clGetPlatformIDs() in the main().

Upvotes: 1

Views: 1258

Answers (1)

jprice
jprice

Reputation: 9925

You need to link against the OpenCL framework. This involves adding -framework OpenCL to your command-line, or if you're using Xcode adding OpenCL.framework to the Link Binary With Libraries section in Build Phases.

Upvotes: 4

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