Question

我刚刚在我的64位ubuntu盒子上对clang 3.4进行了全新安装，我正在尝试编译一个使用OpenCV的项目。 Clang和OpenCV库都是使用apt-get从ubuntu存储库安装的。使用GCC构建工作正常。构建过程由CMake管理。

当我使用Clang运行构建时，我收到以下错误：

/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clReleaseMemObject@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clGetKernelWorkGroupInfo@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clFlush@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined  reference to `clReleaseKernel@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clReleaseCommandQueue@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clReleaseEvent@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clEnqueueWriteBuffer@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clEnqueueCopyBufferRect@OPENCL_1.1'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clCreateBuffer@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clFinish@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clBuildProgram@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clEnqueueFillBuffer@OPENCL_1.2'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clSetKernelArg@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clCreateProgramWithBinary@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clCreateContext@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clReleaseProgram@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clGetDeviceIDs@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clGetEventProfilingInfo@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clEnqueueUnmapMemObject@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clRetainCommandQueue@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clCreateProgramWithSource@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clCreateKernel@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clGetDeviceInfo@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clReleaseContext@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clRetainContext@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clCreateCommandQueue@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clEnqueueNDRangeKernel@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clWaitForEvents@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clEnqueueReadBuffer@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clEnqueueMapBuffer@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clCreateImage@OPENCL_1.2'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clEnqueueWriteBufferRect@OPENCL_1.1'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clEnqueueCopyBufferToImage@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clGetProgramBuildInfo@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clGetPlatformIDs@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clGetProgramInfo@OPENCL_1.0'
/usr/lib64/gcc/x86_64-linux-gnu/4.8/../../../../lib64/libopencv_ocl.so: undefined reference to `clEnqueueReadBufferRect@OPENCL_1.1'

他们似乎与OpenCL有关。如何修复这些链接器错误？

Answer 1

尝试手动编译。有时通过数据包管理器安装依赖项存在一些问题。而CMake是一个非常强大的工具。它执行编译器，平台等检查。

安装cmake（通过数据包管理器）并从存储库下载最后一个OpenCV源：

https://github.com/Itseez/opencv

并在shell上键入蛋糕构建的标准命令：

$ cd opencv_path
$ mkdir build
$ cmake ..
$ make

执行cake还可以输出一些重要信息，最好阅读它们：）

opencv的CMake脚本还为您提供了一种配置CUDA和OpenCL的好方法！

使用Clang编译基于OpenCV的项目

1 个答案: