OpenCL：如何使用C ++包装器检查构建错误

Question

If I build an openCL Program from source code like this

cl::Program program = cl::Program(context, sourceCode);
program.build(devices);

I would like to check if this was successful. I saw a few examples of how to do this in C, but since my project ist in C++ I was wondering how to get (in case something goes wrong) a readable text message that indicates what might be the issue using the C++ wrapper.

I have also enabled exceptions

#define CL_HPP_ENABLE_EXCEPTIONS 

but do not know if build(...) throws an exception.

I am using the AMD APP SDK 3.0 and the cl2.hpp from the Khronos webpage (as it was not included in the SDK).

Answer 1

The cl::Program::build() function does indeed throw an exception if the build fails. Here's how you can get the build log:

cl::Program program = cl::Program(context, sourceCode);
try
{
  program.build(devices);
}
catch (cl::Error& e)
{
  if (e.err() == CL_BUILD_PROGRAM_FAILURE)
  {
    for (cl::Device dev : devices)
    {
      // Check the build status
      cl_build_status status = program.getBuildInfo<CL_PROGRAM_BUILD_STATUS>(dev);
      if (status != CL_BUILD_ERROR)
        continue;

      // Get the build log
      std::string name     = dev.getInfo<CL_DEVICE_NAME>();
      std::string buildlog = program.getBuildInfo<CL_PROGRAM_BUILD_LOG>(dev);
      std::cerr << "Build log for " << name << ":" << std::endl
                << buildlog << std::endl;
  }
  else
  {
    throw e;
  }
}