gistfile1.c

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

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

        exit(1);
    }