为什么我的openCL构建在OS X上失败？

Question

我在OS X 10.7 Lion上安装了所有的开发工具,但是当我在一个相对简单的程序上运行GCC时,只需要通过几次调用openCL函数等直接C clCreateProgramFromSource,我得到以下错误列表:

Undefined symbols for architecture x86_64:
  "_CreateContext", referenced from:
    _build_kernel in ccFuZYMI.o
  "_GetDevices", referenced from:
    _build_kernel in ccFuZYMI.o
  "_CreateCommandQueue", referenced from:
    _build_kernel in ccFuZYMI.o
  "_clCreateProgramWithSource", referenced from:
    _build_kernel in ccFuZYMI.o
  "_clBuildProgram", referenced from:
    _build_kernel in ccFuZYMI.o
  "_clCreateKernel", referenced from:
    _build_kernel in ccFuZYMI.o
  "_clCreateBuffer", referenced from:
    _build_kernel in ccFuZYMI.o
  "_clEnqueueWriteBuffer", referenced from:
    _sync_run_kernel in ccFuZYMI.o
  "_clSetKernelArg", referenced from:
    _sync_run_kernel in ccFuZYMI.o
  "_clEnqueueNDRangeKernel", referenced from:
    _sync_run_kernel in ccFuZYMI.o
  "_clEnqueueReadBuffer", referenced from:
    _sync_run_kernel in ccFuZYMI.o
  "_clReleaseContext", referenced from:
    _destroy_kernel in ccFuZYMI.o
  "_clReleaseCommandQueue", referenced from:
    _destroy_kernel in ccFuZYMI.o
  "_clReleaseMemObject", referenced from:
    _destroy_kernel in ccFuZYMI.o
  "_clReleaseProgram", referenced from:
    _destroy_kernel in ccFuZYMI.o
  "_clReleaseKernel", referenced from:
    _destroy_kernel in ccFuZYMI.o
ld: symbol(s) not found for architecture x86_64

还有一些其他警告,但在计算阶段没有其他错误.这是(如果不清楚)链接器错误.它似乎能够在创建目标文件时从头文件中看到定义,因为它给出了有关不兼容指针类型的警告.

我已经尝试粘贴到xcode项目中,但我得到了完全相同的错误.我尝试了唯一的其他OS X Lion/OpenCL结果的解决方案,但它没有帮助.

Answer 1

看起来你错过了OpenCL框架 - 试试:

$ gcc -Wall foo.c -framework OpenCL -o foo