error code (-11):: what are all possible reasons of getting error “cl_build_program_failure” in OpenCL?

Question

I am using ATI RV770 graphics card, OpenCl 1.0 and ati-stream-sdk-v2.3-lnx64 on linux.

While running my host code which includes following two sections to build kern

Answer 1

This error is typically caused by a syntax error in your kernel code. You can call the OpenCL function clGetProgramBuildInfo with the flag CL_PROGRAM_BUILD_LOG to access the log generated by the compiler. This log contains the output you are probably used to when compiling on the command-line (errors, warnings, etc.).

For example, you could add something similar to the following after you call clBuildProgram:

if (err == CL_BUILD_PROGRAM_FAILURE) {
    // Determine the size of the log
    size_t log_size;
    clGetProgramBuildInfo(program, devices_id[0], CL_PROGRAM_BUILD_LOG, 0, NULL, &log_size);

    // Allocate memory for the log
    char *log = (char *) malloc(log_size);

    // Get the log
    clGetProgramBuildInfo(program, devices_id[0], CL_PROGRAM_BUILD_LOG, log_size, log, NULL);

    // Print the log
    printf("%s\n", log);
}

You can also see the function buildOpenCLProgram() in SDKCommon.cpp in the AMD APP SDK for a real example.